Committee on NFPA 30 · PDF filethe design pressure of other atmospheric tanks when filling or emptying the tank or because of atmospheric temperature changes. Low-pressure tanks and

Committee on NFPA 30

M E M O R A N D U M

TO: NFPA Technical Committee on Tank Storage and Piping Systems

FROM: Jeanne Moreau

DATE: March 24, 2010

SUBJECT: NFPA 30 A11 ROP Letter Ballot

The ROP letter ballot for NFPA 30 is attached. The ballot is for formally voting on

whether or not you concur with the committee’s actions on the proposals. Reasons must

accompany all negative and abstention ballots.

Please do not vote negatively because of editorial errors. However, please bring such

errors to my attention for action.

Please complete and return your ballot as soon as possible but no later than Wednesday,

April 7, 2010. As noted on the ballot form, please submit the ballot to Jeanne Moreau,

e-mail to [email protected] or fax to 617-984-7110.

The return of ballots is required by the Regulations Governing Committee Projects.

Attachment: Proposals

mailto:[email protected]

Report on Proposals – June 2011 NFPA 30_______________________________________________________________________________________________30-2 Log #CP18 FLC-TAN

_______________________________________________________________________________________________Technical Committee on Tank Storage and Piping Systems,

Review entire document to: 1) Update any extracted material by preparing separate proposals to

do so, and 2) review and update references to other organizations documents, by preparing proposal(s) as required.

To conform to the NFPA Regulations Governing Committee Projects.

See Proposals 30-17 (Log #16), 30-11 (Log #CP63), 30-13 (Log #CP64), 30-14 (Log #CP65),30-15 (Log #CP66), 30-16 (Log #CP67), 30-18 (Log #CP68) and 30-19 (Log #CP69).

_______________________________________________________________________________________________30-149 Log #CP49 FLC-TAN

_______________________________________________________________________________________________Technical Committee on Fundamentals,

Revise 21.1 to read:"21.1 Scope. This chapter shall apply to the following:(1) The storage of flammable and combustible liquids, as defined in 3.3.30 and Chapter 4, in fixed tanks that exceed

60 gal (230 L) capacity(2) The storage of flammable and combustible liquids in portable tanks that exceed 660 gal (2500 L) capacity and(3) The storage of flammable and combustible liquids in intermediate bulk containers that whose capacity exceeds

793 gal (3000 L)(43) The design, installation, testing, operation, and maintenance of such tanks, portable tanks, and bulk containers

These revisions to the scope of Chapter 21 clarify which portable tanks and intermediate bulkcontainers are covered by the chapter.

_______________________________________________________________________________________________30-150 Log #CP27 FLC-TAN


Add a new 21.3.1 to read: "Storage of Class II and Class III liquids heated at or above their flashpoint shall follow the requirements for Class I liquids, unless an engineering evaluation conducted in accordance withChapter 6 and Section 21.6 justifies following the requirements for some other liquid class."

Renumber existing subsections accordingly.

This requirement provides necessary guidance for the proper application of the requirements of

Chapter 21 to situations where a Class II or Class III liquid is heated to a temperature at or above its flash point.

1Printed on 3/24/2010

Report on Proposals – June 2011 NFPA 30_______________________________________________________________________________________________30-151 Log #81 FLC-TAN

_______________________________________________________________________________________________Richard S. Kraus, PSC Petroleum Safety Consultants / Rep. American Petroleum Institute

Revise text to read as follows:21.4.1.2 (3) Aboveground storage of Class IIIB liquids at temperatures below their flash points in areas not exposed to

a spill or leak of Class I liquid or Class II liquid21.4.1.2 (4) Storage of Class IIIB liquids at temperatures below their flash points inside a building protected by an

approved automatic fire extinguishing system.This change prohibits storage of Class IIIB liquids in combustible tanks if Class IIIB has flammable

liquid hazards

Do not change the existing text. See Proposal 30-150 (Log #CP27).

See Proposal 30-150 (Log #CP27).

_______________________________________________________________________________________________30-152 Log #82 FLC-TAN


Revise text to read as follows:21.4.1.4. Tanks shall be permitted to have combustible or noncombustible linings. The choice selection, specification

and type of the lining material and its required thickness shall depend on the properties of the liquid to be stored. Shouldthere be a change in the characteristics of the liquid to be stored, a management of change hazard analysis shall beconducted to assure that the lining and new material are compatible.

This change provides more specific requirements for choice of lining and provides for a hazard reviewwhen stored materials change

Revise 21.4.1.4 to read as follows:"21.4.1.4. Tanks shall be permitted to have combustible or noncombustible linings. The choice selection, specification

and type of the lining material and its required thickness shall be based depend on the properties of the liquid to bestored. When there is a change in the characteristics of the liquid to be stored, the compatibility of the lining and the

liquid shall be verified."

The Committee has simplified the language. The intent here is to ensure that the lining is

compatible with the liquid stored whenever a change in service occurs.



_______________________________________________________________________________________________Bob Eugene, Underwriters Laboratories Inc.

21.4.2.1.1* Atmospheric tanks shall be designed and constructed in accordance with recognizedengineering standards. Atmospheric tanks that meet any of the following standards shall be deemed as meeting therequirements of 21.4.2.1:(1) API Specification 12B, Bolted Tanks for Storage of Production Liquids(2) API Specification 12D, Field Welded Tanks for Storage of Production Liquids(3) API Specification 12F, Shop Welded Tanks for Storage of Production Liquids(4) API Standard 650, Welded Steel Tanks for Oil Storage(5) UL 58, Standard for Steel Underground Tanks for Flammable and Combustible Liquids(6) ANSI/UL 80, Standard for Steel Tanks for Oil Burner Fuel(7) ANSI/UL 142, Standard for Steel Aboveground Tanks for Flammable and Combustible Liquids(8) ANSI/UL 1316, Standard for Glass-Fiber Reinforced Plastic Underground Storage Tanks for Petroleum Products,

Alcohols, and Alcohol-Gasoline Mixtures(9) ANSI/UL 1746, Standard for External Corrosion Protection Systems for Steel Underground Storage Tanks(10) UL 2080, Standard for Fire Resistant Tanks for Flammable and Combustible Liquids(11) ANSI/UL 2085, Standard for Protected Aboveground Tanks for Flammable and Combustible Liquids

Delete ANSI approval designation from UL 1316.




1. Revise section 21.4.3 and add an annex note as follows

Storage tanks shall be vented to prevent the development of vacuum or pressure that can distort the tank orexceed the rated design pressure of the tank when filling or emptying the tank or because of atmospheric temperaturechanges. Normal vents shall be located above the maximum normal liquid level.

Normal venting shall be provided for primary tanks and each primary compartment of a compartmented tank.Normal venting does not need to be provided for venting of secondary containment.

Normal vents shall be sized in accordance with either API Standard 2000, Venting Atmospheric andLow-Pressure Storage Tanks, or another approved standard. Alternatively, the normal vent shall be at least as large asthe largest filling or withdrawal connection but in no case shall it be less than 1.25 in. (32 mm) nominal inside diameter.

Atmospheric storage tanks shall be vented to prevent the development of vacuum or pressureabove the 1.0 psi (6.9 kPa) maximum operating pressure. that can distort the roof of a cone roof tank or that exceedsthe design pressure of other atmospheric tanks when filling or emptying the tank or because of atmospheric temperaturechanges.

Low-pressure tanks and pressure vessels shall be vented to prevent the development of pressureor vacuum that exceeds the rated design pressure of the tank or vessel. when filling or emptying the tank or vessel orbecause of atmospheric temperature changes. Means shall also be provided to prevent overpressure from any pumpdischarging into the tank or vessel when the pump discharge pressure can exceed the design pressure of the tank orvessel.

If any tank or pressure vessel has more than one fill or withdrawal connection and simultaneousfilling or withdrawal can be made, the vent size shall be based on the maximum anticipated simultaneous flow.

For tanks equipped with vents that permit pressures to exceed a gauge pressure of 2.5 psi (17 kPa)and for low-pressure tanks and for pressure vessels, the outlet of all vents and vent drains shall be arranged todischarge in a manner that prevents localized overheating of or flame impingement on any part of the tank, if vaporsfrom the vents are ignited.

Tanks and pressure vessels that store Class IA liquids shall be equipped with venting devices thatare closed, except when venting under pressure or vacuum conditions.

Tanks and pressure vessels that store Class IB and Class IC liquids shall be equipped with ventingdevices or with listed flame arresters. When used, vent devices shall be closed, except when venting under pressure orvacuum conditions.

Tanks of 3000 barrels (bbl) (126,000 gal or 475 m3) capacity or less that store crude petroleum incrude-producing areas and outside aboveground atmospheric tanks of less than 1000 gal (3785 L) capacity that containother than Class IA liquids shall be permitted to have open vents.

Flame arresters or venting devices required in 21.4.3.6 21.4.3.8 and 21.4.3.7 21.4.3.9 shall bepermitted to be omitted on tanks that store Class IB or Class IC liquids where conditions are such that their use can, incase of obstruction, result in damage to the tank.

Piping for normal vents shall be designed in accordance with Chapter 27.

This proposal clarifies requirements in the normal venting section as follows:1. Consolidates normal venting requirements that are applicable to atmospheric and low pressure tanks and pressure

vessels into 21.4.3.1, and indicates that venting is provided so all tanks do not distort, not just cone roof tanks. A newrequirement for normal venting to be provided above the maximum normal liquid level was also added.2. Section 21.4.3.2 is new and indicates that normal vents are required for both primary tanks and each primary tank

compartment. We have also seen instances where jurisdictions are asking for normal vents, in addition to emergencyvents, to be provided for aboveground secondary containment tanks. An annex note to this section clarifies that this isnot required.3. Sections 21.4.3.4 and 21.4.3.5 have been revised to remove the common venting requirements that were moved

into section 21.4.3.1. Also, 21.4.3.4 now indicates that atmospheric tanks shall be vented to avoid pressures above 1.0psi, which provides guidance to the code user and is consistent with the definition of atmospheric tank in Chapter 3.


Report on Proposals – June 2011 NFPA 30

Accept proposed Code text verbatim, but revise the new Annex as follows:

"A.21.4.3.2 Normal venting is not required for the interstitial space of a secondary containment tank."

The revision to A.21.4.3.2 clarifies the intent.

_______________________________________________________________________________________________30-155 Log #27 FLC-TAN

_______________________________________________________________________________________________Jon Nisja, Northcentral Regional Fire Code Development Committee

Add a new section to read as follows:Atmospheric storage tanks shall be vented to prevent the development of vacuum or pressure that can distort

the roof of a cone roof tank or that exceeds the design pressure of other atmospheric tanks when filling or emptying thetank or because of atmospheric temperature changes.

This requirement shall apply to primary tanks, and each primary tank compartment of a compartmentedtank.

The code does not specifically indicate where the normal vents are to be installed, and it has beenreported that some jurisdictions are requiring normal vents to be provided in the interstitial space of secondarycontainment tanks. The requirement is being proposed for this section so it can apply to both aboveground andunderground tanks.

See Committee Statement and Action on Proposal 30-154 (Log #183).




Primary storage tanks, and each compartment of a compartmented primary storage tank shall include, inaddition to the required vents, openings for filling, withdrawal and inventory control.

The interstitial spaces of storage tanks with enclosed secondary containment shall include, in addition torequired emergency vents, openings for leak detection monitoring equipment.

Fill pipes that enter the top of a tank shall terminate within 6 in. (150 mm) of the bottom of the tank. Fill pipesshall be installed or arranged so that vibration is minimized.Exception No. 1: Fill pipes in tanks whose vapor space under the expected range of operating conditions is not in theflammable range or is inerted need not meet this requirement.Exception No. 2: Fill pipes in tanks handling liquids with minimal potential for accumulation of static charge need notmeet this requirement, provided that the fill line is designed and the system is operated to avoid mist generation and toprovide residence time downstream of filters or screens to allow dissipation of the generated static charge.

. Examples of liquids with minimal potential for accumulation of static chargeinclude crude oil, asphalt, and water-miscible liquids. For additional information, see NFPA 77, Recommended Practiceon Static Electricity.

This proposal describes the openings that must be provided in storage tanks for them to function asanticipated by this Code.

Revise title of 21.4.4 to read: "Tank Fill Pipes."

Do not incorporate any of the other proposed changes.

The title is revised to clarify that the existing requirements only deal with tank fill pipes. Thechanges proposed by the proponent to cover additional tank openings are no longer relevant to this section, given thetitle change, and these recommendations have not been accepted. The recommended provisions to specify tankopenings are also not accepted because the various openings will differ based on the design standard and the purpose

of the tank.




Revise text to read as follows:21.4.5.3 Where tanks are not designed in accordance with standards of the American Petroleum Institute; the

American Society of Mechanical Engineers; ASTM International; or Underwriters Laboratories, Inc; or if corrosion isanticipated beyond that provided for in the design formulas or standards used, degradation shall be compensated for byproviding additional tank material thickness or by application of protective coatings or linings An engineering analysisshall be conducted to determine the proper requirements for said compensation.

This change provides for clarity that it is the tank material and not the lining or coating that needs to bethicker and also requires an engineering analysis to determine the correct remedy..

Revise 21.4.5.3 to read as follows:"21.4.5.3 Where tanks are not designed in accordance with standards of the American Petroleum Institute; the

American Society of Mechanical Engineers; ASTM International; or Underwriters Laboratories, Inc; or if corrosion isanticipated beyond that provided for in the design formulas or standards used, degradation shall be compensated for byproviding additional tank material thickness or by application of protective coatings or linings, as determined by an

engineering analysis."

The revised text developed by the Technical Committee is essentially an editorial

simplification.

_______________________________________________________________________________________________30-158 Log #CP53 FLC-TAN


Change title of subsection from "Initial Testing" to "General".Subsection 21.5.1 addresses a variety of topics related to testing, not just the initial testing>

_______________________________________________________________________________________________30-159 Log #84 FLC-TAN


New text to read as follows:21.5.1.1 An approved listing mark on a tank shall be considered to be evidence of compliance with this requirement.

Tanks not so marked shall be tested before they are placed into service in accordance with the requirements for testingin the codes listed in 21.4.2.1.1, 21.2.1.1.2, 21.4.2.2.1; or 21.4.2.3.1. Upon completion of satisfactory testing, anapproved listing mark shall be placed on the tank and test results shall be recorded in the facility tank file.

This change provides for recording testing to avoid future questions as to the tank’s listing. . .

Revise 21.5.1.1 to read:"21.5.1.1 An approved listing mark on a tank shall be considered to be evidence of compliance with this requirement.

Tanks not so marked shall be tested before they are placed in service in accordance with recognized engineeringstandards or in accordance with the applicable requirements for testing in the standards codes listed in 21.4.2.1.1,21.4.2.2.1, or 21.4.2.3.1. Upon satisfactory completion of testing, a permanent record of the test results shall be

maintained by the owner."

The reference to 21.2.1.1.2 is deleted because it does not exist in the current version of

21.5.1.1 and there is no such numbered paragraph in Chapter 21.




Add a new 21.5.2.1 to read:"21.5.2.1 Testing required by 21.5.2 shall not be required for a primary tank or an interstitial space that continues to

maintain a factory-applied vacuum in accordance with the manufacturer’s instructions. Such components shall beconsidered to be tight until such time that the vacuum is broken. Final tightness testing of an interstitial space shall notbe required if the factory-applied vacuum is maintained until backfill has been completed to the top of the tank."

Nearly all double wall underground and aboveground storage tanks are shipped with a vacuum withinthe interstice. As long as the vacuum remains intact per the manufacturer’s instructions, both walls of the tank are

demonstrated as being tight.

_______________________________________________________________________________________________30-161 Log #30 FLC-TAN


New text to read as follows:Each storage tank, whether underground or aboveground subject to galvanic corrosion or

cracking, containing gasoline-alcohol blends where the alcohol content is in excess of 10 percent and its connectedappurtenances, shall be inspected or monitored as required by its listing, or by the manufacturer’s instructions or byapplicable standards, on an annual basis, to assure the integrity of the tank and appurtenances. Results of saidinspections or monitoring shall be recorded in the facility tank file and be available for review by the authority havingjurisdiction.

This new requirement provides for compliance with new API, UL listings and other requirements foralcohol containing tanks. . .

The code already addresses this subject in Sections 21.8, 22.17, and 23.17.

_______________________________________________________________________________________________30-162 Log #86 FLC-TAN


Revise text to read as follows:21.6. Fire and Hazardous Exposure Prevention and Control.

This change in title provides for changes proposed for this section covering hazardous toxic materialreleases

At this time, hazards other than fire and explosion are not within the scope of the NFPA 30

Flammable and Combustible Liquids Code project.




Revise text to read as follows:21.6.1.1 This section shall apply to the commonly recognized management techniques and fire and hazardous

exposure control methods used to prevent or minimize the loss from fire or explosion or hazardous release in tankstorage facilities. The wide range in size, design and location of tank storage facilities shall preclude the inclusion ofdetailed fire and hazard exposure control methods applicable to all such facilities.

This change provides for management of hazardous liquid and vapor releases



_______________________________________________________________________________________________30-164 Log #88 FLC-TAN


Revised text to read as follows:21.6.1 2 Tank storage facilities shall have establish and implement fire and hazardous material prevention and control

procedures and measures for life safety, for minimizing property loss within and outside of the facility, and for reducingfire exposure to personnel inside and outside the facility and adjoining facilities resulting form fire or explosion orhazardous releases. .

This change covers requirements for hazardous material releases as well as requiring procedures andmeasures for control of fires, explosion and releases.

Revise the first sentence of 21.6.1.2 to read:"Tank storage facilities shall establish and implement have fire prevention and control methods for life safety, for

minimizing property loss, and for reducing fire exposure to adjoining facilities resulting from fire and explosion."

While the Committee agrees with some of the changes in this proposal, it has deleted those

dealing with hazards other than fire and explosion, which are currently not within the scope of NFPA 30.




Revise text to read as follows:21.6.3 Management of Fire, Explosion and Exposure Hazards. The extent of fire, explosion and hazardous release

prevention and control procedures and measures provided for tank storage facilities shall be determined by anengineering evaluation of the installation and operation, followed by the application of sound recognized fire, explosionand release prevention and process engineering principles. The evaluation shall include, but not be limited to thefollowing:(1) Analysis of fire, exposure and explosion hazards of the facility.(2) and (3) NO CHANGE

This change covers requirements for explosions and hazardous material releases as well as requiringprocedures and measures for control of fires, explosion and releases.

Revise 21.6.3 to read as follows:"21.6.3 Management of Fire and Explosion Hazards. The extent of fire and explosion prevention and control

procedures and measures provided for tank storage facilities shall be determined by an engineering evaluation of theinstallation and operation, followed by the application of sound recognized fire and explosion prevention protection andprocess engineering principles. The evaluation shall include, but not be limited to the following:(1) Analysis of fire and explosion hazards of the facility(2) Analysis of local conditions, such as exposure to and from adjacent properties, flood potential, or earthquake

potential

(3) Fire department or mutual aid response"

While the Committee agrees with some of the changes in this proposal, it has deleted thosedealing with hazards other than fire and explosion, which are not currently within the scope of the NFPA 30 Flammable

and Combustible Liquids Code project.




Revise text to read as follows:21.6.5.1 An emergency plan, consistent with the available equipment, resources and personnel, shall be established

and implemented to respond to fires, explosions, hazardous releases and other emergencies. The plan shall addressthe following:(1) Procedures to be use in case of fire, explosion or hazardous release, such as including, but not limited to,

sounding the alarm, notifying the fire department, evacuating personnel, controlling and mitigating the explosion orrelease and controlling and extinguishing the fire.(2) Appointing and training of personnel to carry out fire safety emergency response duties.(3) Maintenance of fire protection, spill control and containment and other emergency response equipment.(4) Conducting holding fire emergency response drills(5) ((6) Alternate measures for the safety of personnel while any fire protection or other emergency response equipment is

shut down or inoperative.This change covers requirements for explosions and hazardous releases as well as requiring

emergency response requirements

Revise 21.6.5.1 to read as follows:"21.6.5.1* An emergency plan, consistent with the available equipment, resources and personnel, shall be established

and implemented to respond to fires, and explosions, and or other emergencies. This plan shall address the following:(1) Procedures to be use in case of fire, explosion, or accidental release of liquid or vapor such as including, but not

limited to, sounding the alarm, notifying the fire department, evacuating personnel, controlling and mitigating theexplosion, and controlling and extinguishing the fire.(2) Appointing and training of personnel to carry out fire safety emergency response duties.(3) Maintenance of fire protection, spill control and containment, and other emergency response equipment.(4) Conducting holding fire emergency response drills(5) Shutdown or isolation of equipment to control unintentional releases(6) Alternate measures for the safety of personnel while any fire protection or other emergency response equipment is

shut down or inoperative."A.21.6.5.1 Resources include but not limited to:

(1) mutual aid(2) water supply

(3) extinguishing agent supply"

While the Committee agrees with some of the changes in this proposal, it has deleted thosedealing with hazardous releases, which are not currently within the scope of the NFPA 30 Flammable and Combustible

Liquids Code project.




Revise text to read as follows:21.6.5.2 Personnel responsible for .the inspection, maintenance, use and operation of fire protection and emergency

response equipment shall be trained and qualified, in the use of and be able to demonstrate knowledge of theinspection, maintenance, use and operation of that equipment. Refreshed training in the use or operation of fireprotection and emergency response equipment shall be conducted at least annually.

This change covers requirements for inspection and maintenance in addition to use and operation. Itadds emergency response equipment in addition to fire protection. .

Add a new 21.6.6.6 to read:"21.6.6.6 Personnel responsible for the inspection and maintenance of fire protection and emergency response

equipment shall be trained and shall be able to demonstrate knowledge of the inspection and maintenance of that

equipment. Refresher training shall be conducted as needed to maintain proficiency."

The changes proposed by the submitter belong in Section 21.6.6, not in 21.6.5. The wording

has been changed to reflect performance requirements.

_______________________________________________________________________________________________30-168 Log #92 FLC-TAN


Revise text to read as follows:21.6.5.3 Planning of effective fire and hazardous exposure control measures shall be coordinated with local emergency

response agencies and shall include, but not be limited to, the identification of all tanks by location, contents, size, type,and hazard identification as required by 21.7.2.1.

This change adds control of hazards in addition to fire and adds type of tank to the identificationrequirements as fire fighting measure will differ depending on the construction of the tank. .



_______________________________________________________________________________________________30-169 Log #93 FLC-TAN


Revise text to read as follows:21.6.5. 4 Procedures shall be established and implemented to provide for safe shutdown of tank storage facilities

under emergency conditions and for safe return to service following the emergency. These procedures shall providerequirements for periodic training of personnel and scheduled inspection and testing of associated alarms, interlocksand controls.

This change adds implementation of procedures and provides for safe return to service.

Revise 21.6.5.4 to read as follows:"21.6.5.4 Procedures shall be established to provide for safe shutdown of tank storage facilities under emergency

conditions and for safe return to service. These procedures shall provide requirements for periodic training of personnel

and scheduled inspection and testing of associated alarms, interlocks and controls."

The changes made to this proposal are essentially editorial to simplify the text.




Revise text to read as follows:21.6.5. 5 Emergency procedures shall be kept available in an operating area. The procedures shall be reviewed and

updated whenever conditions change as required in 6.4.2, Management of Change.This change references management of change requirements for better control of change

Add an annex item to 21.6.5.5 to read:

"A.21.6.5.5 See Subsection 6.4.2."

The addition of the annex item more effectively meets the submitter's intent without limiting the

requirement to 6.4.2.

_______________________________________________________________________________________________30-171 Log #95 FLC-TAN


Revise text to read as follows:21.6.6 Inspection and Maintenance of Fire Protection and Emergency Response Equipment .

This change in title reflect proposed changes to section 21.6.6

_______________________________________________________________________________________________30-172 Log #96 FLC-TAN


Revise text to read as follows:21.6.6.1 All fire protection and emergency response equipment shall be maintained, inspected and tested in

accordance with regulatory requirements, standard practices and equipment manufacturer’s recommendations. .This change adds emergency response equipment to the requirements

_______________________________________________________________________________________________30-173 Log #97 FLC-TAN


Revise text to read as follows:21.6.6.2 Maintenance and operating procedures and practices at tank storage facilities shall be established and

implemented to control leakage and prevent spillage and release of liquids.This change provides for establishing and implementing procedures (in addition to practices) and to

prevent release of liquids (other than a spill)




Revise text to read as follows:21.6.6.4 Accessways established for movement of personnel shall be maintained clear of obstructions to permit

evacuation and access for manual fire fighting and emergency response in accordance with regulatory requirementsand the emergency plan.

This change provides for an emergency other than fire

_______________________________________________________________________________________________30-175 Log #99 FLC-TAN


Revise text to read as follows:21.7.1.1 Facilities with aboveground tanks that receive and transfer Class I liquids form mainline pipelines or marine

vessels shall establish and follow implement formal written procedures in accordance with API 2350,or similar industry standards to prevent overfilling of tanks utilizing one of the

following methods of protection: ( )This change moves the requirements for compliance with industry standards from the annex to the

code, making it mandatory

The reference to API RP 2350 already appears in the annex and is redundant in 21.7.1.1.The reference to other industry standards is deleted, since such referenced standards could conflict with the specific

requirements in API 2350.

_______________________________________________________________________________________________30-176 Log #CP56 FLC-TAN


Replace the current text of 21.7.1.5 with the following:"21.7.1.5 An underground tank shall be equipped with overfill prevention equipment that will operate as follows:(1) Alert the transfer operator when the tank is no more than 90 percent full by triggering an audible and visual

high-level alarm and(2) Automatically shut off the flow of liquid into the tank when the tank is no more than 95 percent fullOther approved methods shall be permitted."

This is basically an editorial rearrangement of the text for clarity.




Revise text to read as follows:21.7.2.2 Security for Unsupervised Storage Tanks. Unsupervised isolated aboveground storage tanks shall be

secured and shall be marked to identify the fire and exposure hazards of the tank and the tank’s contents to the generalpublic.

This change adds identification for hazards other than fire such as defined by NFPA 704



_______________________________________________________________________________________________30-178 Log #101 FLC-TAN


Revise text to read as follows:21.7.3.2 Operating Instructions. Operating instructions or procedures to be followed in a flood emergency shall be

established and made available for implementation by personnel identified in 21.7.3.3This change required establishing the procedures so they can be implemented

_______________________________________________________________________________________________30-179 Log #102 FLC-TAN


Revise text to read as follows:21.7.3.3 Personnel Training. Personnel relied on to carry out activate and perform flood emergency procedures shall

be trained in their implementation and shall be informed of the location and operation of valves and other controls andequipment necessary to effect the intent of these procedures. requirements. Personnel shall also be trained andqualified in the procedures required to place the facility back into service following a flood emergency.

This change requires establishing and implementing the procedures by trained personnel. And addscontrols in addition to valves and equipment.

Revise 21.7.3.3 to read as follows:"21.7.3.3 Personnel Training. Personnel relied on to carry out activate and perform flood emergency procedures shall

be trained in their implementation and shall be informed of the location and operation of valves and other controls andequipment necessary to effect the intent of these procedures. requirements. Personnel shall also be trained in the

procedures required to place the facility back into service following a flood emergency. "

Accept the proposal, but remove the words "and qualified" from the second sentence. It is

redundant.




Revise text to read as follows:21.7.4.3.3 Permanent Closure in Place. Underground tanks shall be permitted to be permanently closed in place if

approved by the authority having jurisdiction. Written procedures shall be established and implemented to assure that allof the following requirements shall be met:

This change required establishing and implementing written procedures

The proposed change offers no improvement, since permanent closure is a one-time

procedure.

_______________________________________________________________________________________________30-181 Log #104 FLC-TAN


Revise text to read as follows:21.8.8 Facilities with aboveground storage tanks shall establish and implement a procedure for checking and removal

of water from the bottom of storage tanks that contain nonmiscible liquids or water reactive liquids.This provides for implementation of procedures not just establishment and also provides for water

removal from tanks containing liquids that are water reactive.

Revise 21.8.8 to read as follows:"21.8.8 Facilities with aboveground storage tanks shall establish and implement a procedure for checking and removal

of water from the bottom of storage tanks that contain nonmiscible liquids."

At this time, the hazards of water reactive materials is not within the scope of the NFPA 30Flammable and Combustible Liquids Code project.



_______________________________________________________________________________________________Kendall Crawford, Houston, TX

New text to read as follows:Add a new 21.8.9 and accompanying annex item to read:“21.8.9* Overfill protection and prevention systems and tank level gauging systems shall be inspected and maintained

in accordance with manufacturer’s specifications to ensure their proper operation as intended by the operationalprocedures of the facility.A.21.8.9 Refer to API 2350, Overfill Protection for Storage Tanks in Petroleum Facilities, for appropriate information on

such systems.”Recent overfill incidents that have led to serious fires, e.g., the Dec 11, 2005 spill, explosion and fire in

Buncefield UK, and more recent incidents, demonstrate the need for proper maintenance and oversight of automatictank gauging systems and overfill protection systems so that they can function as intended with called upon to do so.

Revise 21.8.6 and its Annex item to read:"21.8.6* Storage tanks and their appurtenances, including normal vents, emergency vents, overfill prevention devices,

and related devices shall be inspected and maintained to ensure that they function as intended in accordance withwritten procedures.A.21.8.6 For additional information, see API 653, Tank Inspection, Repair, Alteration, and Reconstruction, API RP

2350, Standard for Overfill Prevention for Storage Tanks In Petroleum Facilities, and PEI RP600, Recommended

Practices for Overfill Prevention for Shop-Fabricated Aboveground Tanks."

Subsection 21.8.6 already addresses maintenance of tank appurtenances and is a logical

place to address inspection of appurtenances as well. A reference to PEI RP600 is appropriate here and is included.

_______________________________________________________________________________________________30-183 Log #CP20 FLC-TAN


Add a new Section 21.9 to read:21.9 Change of Stored Liquid. Storage tanks that undergo any change of stored liquid shall be re-evaluated for

compliance with Chapters 21 through 25, as applicable.

Delete 21.7.4.3.9.

This requirement exists in the current code only for underground storage tanks. The requirement

logically applies to any tank storing flammable or combustible liquid.




Revise 22.1 to read:"22.1 Scope. This chapter shall apply to the following:(1) The storage of flammable and combustible liquids, as defined in 3.3.30 and Chapter 4, in fixed tanks that exceed

60 gal (230 L) capacity(2) The storage of flammable and combustible liquids in portable tanks that exceed 660 gal (2500 L) capacity and(3) The storage of flammable and combustible liquids in intermediate bulk containers that whose capacity exceeds

793 gal (3000 L)(43) The design, installation, testing, operation, and maintenance of such tanks, portable tanks, and bulk containers

These revisions to the scope of Chapter 22 clarify which portable tanks and intermediate bulkcontainers are covered by the chapter.

_______________________________________________________________________________________________30-185 Log #CP28 FLC-TAN


Revise 22.3 to read as follows:"22.3 General Requirements.22.3.1 Storage of Class II and Class III liquids heated at or above their flash point shall follow the requirements for

Class I liquids, unless an engineering evaluation conducted in accordance with Chapter 6 justifies following the

requirements for some other liquid class."



_______________________________________________________________________________________________30-186 Log #105 FLC-TAN


Revise and add new text to read as follows:22.4.1.2 Vertical tanks with weak roof to shell seams (see 22.7.2) that store Class IIIA liquids at temperatures below

their flash points shall be permitted to be ...This limits the requirements to Class IIIA liquids only at temperatures below the flash point.






Revise and add new text to read as follows:22.4.1.6 Tanks storing Class IIIB stable liquids shall be located in accordance with table 2.4.1.622.4.1.6.1 Tanks storing Class IIIB liquids shall be located in accordance with 22.4.1.1 if when located within

the same diked area as, or within the drainage path of, a tank storing a Class I or Class II liquid

22.4.1.6.2 Tanks storing Class IIIB liquids at temperatures at or above their flash points shall be located in accordancewith 22.4.1.1

This (6.1) changes the exception to a requirement and also (6.2) adds requirements for Class IIIBliquids at high temperatures.

Given the hazard at issue, i.e., exposure to a potential fire involving or spill from a tank storing

Class I or Class II liquid, it is irrelevant whether the Class IIIB liquid is heated or unheated.

_______________________________________________________________________________________________30-188 Log #CP1 FLC-TAN

_______________________________________________________________________________________________Technical Committee on Tank Storage and Piping Systems,

Clarify the text that was the subject of the following Formal Interpretation.Question No. 1: Does the term “sum of adjacent tank diameters” refer to the diameter of one tank plus the diameter of

a single adjacent tank?Answer: Yes.Question No. 2: Where there are more than two tanks adjacent to each other, is the “sum of adjacent tank diameters”

determined for each pair of tanks, as opposed to adding the diameters of all tanks present?

Answer: Yes.

The Regulations Governing Committee Projects require that a proposal be processed to clarify the text

of a document on which a Formal Interpretation has been issued.

Add a note to Table 22.4.2.1 to read:"Note: The "sum of adjacent tank diameters" means the sum of the diameters of each pair of tanks that are adjacent to

each other. See also A.22.4.2.1."Add an annex item to 22.4.2.1 to read:"Where more than two tanks are involved, the sum of the diameters of each possible pair of tanks is calculated. For

example, assume four tanks in a common diked area, numbered 1 through 4 clockwise from tank #1. The diameter of

each pair of tanks is summed, as follows: 1 and 2, 1 and 3, 1 and 4, 2 and 3, 2 and 4, and 3 and 4."

The proposed note to Table 22.4.2.1 and the annex item to 22.4.2.1 resolve this Formal

Interpretation.

_______________________________________________________________________________________________30-189 Log #107 FLC-TAN


Revise text to read as follows:22.4.2.1 Tanks storing Class I, Class II or Class IIIA stable liquids shall be separated by the distances given in Table

22.4.2.1This corrects an error in the text .Table 22.4.2.1 covers Class IIIA not Class III




Revise text to read as follows:22.4.2.1.2 Tanks used only for storing Class IIIB liquids at temperatures below their flash points shall not be required

This provides for proper spacing for Class IIIB liquids stored at higher temperatures.

For the purpose of this paragraph, it is irrelevant whether the Class IIIB liquid is heated or

unheated.

_______________________________________________________________________________________________30-191 Log #109 FLC-TAN


New text to read as follows:22.4.2.1.3 Tanks used only for storing Class IIIB liquids at temperatures at or above their flash points shall be

separated by the distances given in Table 22.2.4.2.1 for Class I or Class II liquids.This provides for proper spacing for Class IIIB liquids stored at higher temperatures.



_______________________________________________________________________________________________30-192 Log #110 FLC-TAN


Revise text to read as follows:22.4.2.4 The minimum horizontal separation between an LP gas container and a Class I, Class II or Class IIIA liquid

storage tank, or a storage tank containing Class IIIB liquid at temperatures at or above its flash point, shall be 20 ft (6m).

This delineates proper spacing for Class IIIB liquids stored at temperatures at or above their flashpoints






Revise text to read as follows:22.5.2.3 Where tanks storing Class I, Class II or Class IIIA liquid storage tank, or a storage tank containing Class IIIB

liquid at temperatures at or above its flash point, are supported above their foundations, tank supports shall be ofconcrete, masonry or protected steel.




_______________________________________________________________________________________________30-194 Log #112 FLC-TAN


Revise text to read as follows:22.5.2.4 Steel support structures or exposed piling for tanks storing Class I, Class II or Class IIIA liquid storage tank,

or a storage tank containing Class IIIB liquid at temperatures at or above its flash point, shall be protected by materialshaving a fire resistance rating of not less than 2 hours.




_______________________________________________________________________________________________30-195 Log #CP55 FLC-TAN


Revise 22.5.2.6.1 to read:"21.5.2.6.1 The interstitial space (annulus) of such tanks shall be tested either hydrostatically or with air pressure at a

gauge pressure of 3 to 5 psi (20 to 35 kPa) by vacuum at 5.3 in Hg 2.6 psi (18 kPa), or in accordance with the tank’slisting or the manufacturer’s instructions. These limits shall not be exceeded.'"

When measuring vacuum, inches of mercury (Hg) is the more appropriate measurement.




Revise text to read as follows:22.7.1.1.3 Tanks storing Class IIIB liquids at temperatures below their flash points that are larger than 12,000 gal

(45,400 L) capacity ……… .This delineates proper spacing for Class IIIB liquids stored at temperatures below their flash points



_______________________________________________________________________________________________30-197 Log #175 FLC-TAN

_______________________________________________________________________________________________Samuel A. Rodgers, Honeywell, Inc.

Revise text to read as follows:22.7.3.2.2 The wetted area of a the tank or storage vessel shall be calculated as follows:(1) Spheres or Spheroids - Fifty-five percent of the total exposed area or the exposed area to a height of 30 ft (9m)

above grade, whichever is greater of a sphere or spheroid(2) Horizontal Tanks - Seventy-five percent of the total exposed area or the exposed area to a height of 30 ft (9m)

above grade, whichever is greater of a horizontal tank(3) Vertical Tanks - One hundred percent of the exposed shell and floor area, plus one hundred percent of the vertical

shell to a height of 30 ft (9m) above grade of a rectangular tank, but excluding the top surface of the tank(4) The first 30 ft (9 m) above grade of the exposed shell area of a vertical tank

The current text is confusing to the user and does not clearly incorporate the limitation of 30 ft abovegrade into the exposed areas of all tankage. NFPA-30 is in substantial agreement with API-2000 in areas except thewetted area determination. This change would retain the current conservatism for the bottom of a vertical tank, whileclearly applying the concept that fire heat loads can affect the upper exposed areas of smaller vessels, as often found inchemical facilities.

No technical substantiation has been provided to justify this amendment. While the TechnicalCommittee acknowledges the difference between NFPA 30 & API 2000, the historical basis for the requirements in API2000 is not known. Lacking a technical basis for changing NFPA 30, the Technical Committee chooses to remain

consistent with the provisions of UL 142, which currently matches NFPA 30.




Revise 22.7.3.10 to read:"22.7.3.10 Each commercial tank venting device shall have the following information affixed to stamped on it:(1) Start-to-open pressure(2) Pressure at which the valve reaches the full open position(3) Flow capacity at the pressure indicated by 22.7.3.10(2)The information shall be either stamped or cast into the metal body of the device or shall be included on a metal

nameplate permanently affixed to it."Some manufacturers provide this information on metal label or tag that is permanently attached to the

body of the venting device. The Committee sees no reason not to allow this means of complying with 22.7.3.10.

_______________________________________________________________________________________________30-199 Log #114 FLC-TAN


Revise text to read as follows:22.8 Fire protection for Aboveground Storage Tanks. A fire extinguishing system in accordance with an applicable

NFPA standard shall be provided or shall be available for vertical atmospheric fixed roof storage tanks larger than50,000 gal (190m3) capacity storing Class I liquids or storing Class II or Class III liquids at temperatures at or abovetheir flash points, if located in a congested area where there is an unusual exposure hazard to the tank from adjacentproperty or to adjacent property from the tank.

This delineates proper protection for Class Ii and III liquids stored at temperatures above their flashpoints



_______________________________________________________________________________________________30-200 Log #115 FLC-TAN


Revise text to read as follows:22.11. Control of Spills from Aboveground Storage Tanks. Every tank that contains a Class I Class II or Class IIIA

liquid, or a hazardous liquid shall be provided with means to prevent an accidental release of liquid from endangeringimportant facilities and adjoining property or from reaching waterways, Such means shall meet the requirements of22.11.1, 22.11.2, 22.11.3, or 22.11.4 whichever is applicable.

This delineates proper protection for hazardous liquids other than flammable and combustible.






New text to read as follows:22.11. 1.5 (new) Where the potential exists for a toxic exposure as a result of an accidental release of a hazardous

liquid material the drainage and impounding shall provide for containment of vapors to control such exposure .This provides for proper protection for exposures to hazardous liquids other than flammable and

combustible liquids



_______________________________________________________________________________________________30-202 Log #117 FLC-TAN


Revise text to read as follows:22.11. 2.6.3.5 Whenever two or more tanks storing Class I liquids, or storing Class Ii or Class III liquids at

temperatures at or above their flash points, or a hazardous liquid, any one of which is over 150 ft (45 m) in diameter arelocated in a common diked area, intermediate dikes shall be provided between adjacent tanks to hold at leats 10percent of the capacity of the tank so enclosed not including the volume displaced by the tank.

This provides for proper protection for exposures to hazardous liquids and Class II and III liquids attemperatures above their flash points

At this time, hazards other than fire and explosion are not within the scope of the NFPA 30Flammable and Combustible Liquids Code project. As to heated Class III liquids, do not change the existing text. See

Proposal 30-185 (Log #CP28).

_______________________________________________________________________________________________30-203 Log #118 FLC-TAN


Revise text to read as follows:22.13.4 Filling and emptying connections for Class I, Class II and Class IIIA liquids and for Class IIIB liquids at

temperatures at or above their flash points that are connected and disconnected shall be located outside of buildings ata location free from any source of ignition.

This provides for proper protection for exposures to Class IIIB liquids at temperatures above their flashpoints






Revise text to read as follows:22.13.4.1 Such connections shall be located not less than 5 ft (1.5 m) away from any building opening so that vapors

will not be trapped by eaves or other obstructions and shall be at least 5 ft (1.5 m) from building openings and at least15 ft (4.5 m) from powered ventilation air intake devices.

This provides for proper protection as required by 27.8.1.1

The substantiation is not justified. To equate a fill connection, which is capped unless actuallybeing used, with a vent is not technically correct. A fill connection does not release the same quantities of vapors as

would a vent and would not do so continuously.

_______________________________________________________________________________________________30-205 Log #120 FLC-TAN


Revise text to read as follows:22.17.3. Each tank constructed of other materials other than steel shall be inspected and maintained in accordance

with manufacturers instructions and applicable standards.This provides for clarity

_______________________________________________________________________________________________30-206 Log #CP60 FLC-TAN


Revise 22.17.4 to read:"22.17.4* Pontoons in external floating roof tanks shall be inspected, at intervals not exceeding 5 years, by visual and

atmospheric testing methods to ensure that the pontoon covers are mechanically secured to the floating roof deck andto ensure the pontoons do not contain liquids or vapors resulting from leaks or corrosion holes in the pontoons. Ifliquids, or flammable vapor concentrations at or above 25% of the LFL are found, the liquids or vapors shall be safelyremoved and the source of the leak shall be repaired. The finding of vapors at levels below 25% of the LFL shall resulteither in the implementation of monitoring of the tank pontoons at least annually to assure that vapors in the flammablerange are not achieved before corrective action is taken or removal of the tank from service. Rim vents, if any, shallalso be inspected to ensure that they are not frozen open.

A.22.17.4 An explosion hazard can exist due to flammable liquids or vapors within the pontoon. Ignition can becaused by lightning strikes or general maintenance activities. Lightning protection systems and other means of tankgrounding cannot prevent sparking caused by lightning across gaps such as those between pontoon covers and thetank roof, between the tank wall and the roof, or at shunts. Such sparks can serve as a source of ignition causing a fireor explosion resulting in sufficient overpressure to throw portions of the pontoon assembly completely away from thetank with subsequent, partial, or complete loss of the tank due to fire. Caution is particularly advisable when tanks withvapor-containing pontoons are located within lightning prone areas."

API 653, Tank Inspection, Repair, Alteration, and Reconstruction, states that, if liquid is found in thepontoons, the leak should be corrected. It is unclear as to the steps to be taken if vapors are found. Inspectioncompanies currently do not consider a finding of vapors outside the flammable limits to warrant more than a watch-and-see approach. No guidance is given about the frequency of re-inspection of the pontoon with vapors.




Revise text to read as follows:23.1 (1) The storage of flammable, combustible and hazardous liquids as defined in 3.30 and Chapter 4 in fixed

underground tanks.

This provides for inclusion of water miscible and unstable liquids and other liquids as defined in 3.30



_______________________________________________________________________________________________30-208 Log #CP29 FLC-TAN


Add a new 23.3.1 to read: "Class II and Class III Liquids At Elevated Temperatures. Storage ofClass II and Class III liquids heated at or above their flash point shall follow the requirements for Class I liquids, unlessan engineering evaluation conducted in accordance with Chapter 6 justifies following the requirements for some otherliquid class."

Renumber existing subsections accordingly.



_______________________________________________________________________________________________30-209 Log #122 FLC-TAN


Revise text to read as follows:23.4.2 The distance from any part of a tank storing Class I liquids, or Class II or Class III liquids at temperatures at or

above their flash points to the nearest wall of any basement or pit shall not be less than 1 ft (0.3 m) and not less than 3 ft(0.9 m) to any property line that can be built upon not less than 3 ft (0.9 m).

This provides for inclusion Class II and II liquids when they are similar to Class I (and replaces thedangling participle).

Revise 23.4.2 to read as follows:"23.4.2 The distance from any part of a tank storing Class I liquids to the nearest wall of any basement or pit shall not

be less than 1 ft (0.3 m) and to any property line that is or can be built upon shall not be less than 3 ft (0.9 m)."

The reference to heated Class II or Class III liquids is deleted. See Proposal 30-208 (Log#CP29). Editorial changes have been made to effect consistency with other similar provisions of the Code.




Revise text to read as follows:23.4.3 The distance from any part of a tank storing Class II or Class III liquids at temperatures below their flash points

to the nearest wall of any basement, pit or property line shall not be less than 1 ft (0.3 m)This provides for clarity vs 23.4.2



_______________________________________________________________________________________________30-211 Log #124 FLC-TAN


Revised text to read as follows:23.13.5 Underground tanks for Class I liquids, hazardous liquids, and for Class II and Class III liquids delivered or

stored at temperatures at or above their flash points having a capacity of more than 1000 gals (3800 L) shall beequipped with a tight fill device for connecting the fill hose to the tank.

This provides for protection when filling hazardous chemicals or heated products.



_______________________________________________________________________________________________30-212 Log #125 FLC-TAN


Revised text to read as follows:23.13.6 Filling, emptying and vapor recovery connections for Class I, Class II and Class IIIA liquids, hazardous liquids

and for Class IIIB liquids delivered or stored at temperatures at or above their flash points that are connected anddisconnected shall be located outside of buildings at a location free from any source of ignition and not less than 5 ft (1.5m) from any building opening or air intake.

This provides for protection when filling hazardous chemicals or heated Class IIIB products andprovides for protection from intake of vapors by fresh air systems.

Revised 21.13.6 to read as follows:"23.13.6 Filling, emptying and vapor recovery connections for Class I, Class II and Class IIIA liquids,that are

connected and disconnected shall be located outside of buildings at a location free from any source of ignition and not

less than 5 ft (1.5 m) from any building opening or air intake.

The reference to hazardous liquids is deleted because, at this time, hazards other than fire

and explosion are not within the scope of NFPA 30. See also Proposal 30-208 (Log #CP29).




Revise 23.14 to read:"23.14 Underground Storage Tanks Located in Areas Subject to Flooding.23.14.1* Tanks shall be anchored or shall be secured by approved means to resist movement when subjected to

hydrostatic forces associated with high groundwater or floodwater.23.14.1.1 The design of the anchoring or securing method shall be based on the buoyancy of an empty tank that is

fully submerged.23.14.1.21 Tank vents and or other openings that are not liquidtight shall be extended above maximum flood stage

water level.Water Ballast. At locations where an ample and dependable water supply is available, underground tanks containing

flammable or combustible liquids, placed so that more than 70 percent of their storage capacity will be submerged at themaximum flood stage, shall be so anchored, weighted, or secured as to prevent movement when filled or loaded withwater and submerged by floodwater to the established flood stage.

23.14.2* Tank Anchoring. At locations where an ample and dependable water supply is not available or where filling ofunderground tanks with water is impractical because of the contents, each tank shall be safeguarded against movementwhen empty and submerged by high groundwater or floodwater by anchoring or by securing by other means.

23.14.1.32.1 Each such tank shall be so constructed and installed that it will safely resist external pressures ifsubmerged.

A.23.14.12 Anchoring can be accomplished should be done using metallic straps that are separated from the tankshell by inert insulating dielectric material or using nonmetallic straps. The straps should be connected to a bottomhold-down pad or deadman anchors. For additional information, see reference to API RP 1615, Installation ofUnderground Petroleum Storage Systems; PEI RP100, Recommended Practices for Installation of Underground LiquidStorage Systems; and STI RP R011, Recommended Practice for Anchoring of Steel Underground Storage Tanks.

Previous editions of NFPA 30 included provisions for the use of water ballast as a means to weight a tank to preventmovement during a flood. In anticipation of a flood event, water could be used to fill the tank to reduce buoyancy. Whilethis approach remains technically viable for existing tanks that are not properly secured to prevent movement, the use ofwater as a means of providing ballast is no longer considered an acceptable basis of design for new tank installations.

It is not the intent of this section to prohibit the use of water as ballast in underground tanks during sytem installationand prior to the initial introduction of the stored liquid."

The substantiation for this change is basically stated in the proposed annex text. In addition, becausetank contents might have to be disposed of as hazardous waste, because human intervention is required to ballast thetank prior to a flood event, and because, once a tank has been filled with water, remaining fuel is no longer available for

use by vehicles that may require fueling to facilitate evacuation.




Revise text to read as follows:23.14.1 Water Ballast. At locations where an ample and dependable water supply is available, underground tanks

containing flammable, combustible or hazardous liquids shall be placed so that more than 70 percent of their storagecapacity will be submerged at the maximum flood stage. Tanks shall be so anchored, weighted or secured as to preventmovement when filled or loaded with water and submerged by floodwater to the established flood stage.

This provides for protection when filling hazardous chemicals and clarity by splitting into two sentences



_______________________________________________________________________________________________30-215 Log #127 FLC-TAN


Revise text to read as follows:24.1.2 This chapter shall also apply to installations of aboveground storage tanks storing hazardous liquids and Class

IIIB liquids in storage tank buildings where Class IIIB liquids are heated up to at temperatures at or above their flashpoints.

This provides for storing hazardous liquids and indicated Class IIIB at or above, not “up to” flash points

Revise 24.1.2 to read as follows:"24.1.2 This chapter shall also apply to installations of aboveground storage tanks storing Class II, Class IIIA, or Class

IIIB liquids in storage tank buildings where the Class IIIB liquids are heated at up to or above their flash points. In suchcases, the liquids shall regulated as Class I liquids unless an engineering evaluation conducted in accordance with

Chapter 6 justifies following the requirements for some other liquid class."

This is consistent with the amendments made in Proposals 30-150 (Log #CP27), 30-185 (Log#CP28), and 30-208 (Log #CP29).

_______________________________________________________________________________________________30-216 Log #128 FLC-TAN


Revise text to read as follows:24.4.9 Class I liquids, hazardous liquids and Class II and Class IIIA liquids heated at or above their flash points shall

not be stored in basements. .This provides for safely storing hazardous liquids and includes all Class III heated liquids not just Class

IIIA

Do not change the existing text. See Proposal 30-215 (Log #127).

See Proposal 30-215 (Log #127).




Revise text to read as follows:24.5.3 Where Class I liquids, hazardous liquids and Class II and Class III liquids heated at or above their flash points

are stored above grade within buildings with basements or other belowground areas into which flammable or hazardousvapors can travel, such belowgrade areas shall be provided with mechanical ventilation designed to prevent theaccumulation of flammable or hazardous vapors. Enclosed storage tank pits shall not be considered basements.

This provides for safely storing hazardous liquids and includes Class II and III heated liquids

Do not change the existing text. See Proposal 30-215 (Log #127).

See Proposal 30-215 (Log #127).

_______________________________________________________________________________________________30-218 Log #32 FLC-TAN


Revise text to read as follows:In all section listed above, add the following phrase after “Class I Liquids”or Hazardous liquids or Class II liquids or Class III Liquids when heated at or above their flash points

This change provides for protection when hazardous liquids and Class II and III liquids are consideredthe same as Class I liquids

Do not change the existing text. See Proposals 30-150 (Log #CP27) and 30-185 (Log #CP28).

At this time, hazards other than fire and explosion are not within the scope of the NFPA 30Flammable and Combustible Liquids Code project. As to heated Class III liquids, see Proposals 30-150 (Log #CP27)

and 30-185 (Log #CP28).

_______________________________________________________________________________________________30-219 Log #130 FLC-TAN


Revise text to read as follows:24.6.2.3 Where the need is indicated by the hazards of storage or exposure as determined by 21.6.3, fixed protection

shall be required utilizing approved foam, foam-water sprinkler systems, sprinkler systems, water spray systems, delugesystems, gaseous extinguishing systems, dry chemical extinguishing systems, fire resistive materials or a combinationof these

This includes all of the systems referenced in 24.6.2.4




Revise text to read as follows:In all sections listed above, add the following word after “flammable”hazardous

This change provides for protection for storage of hazardous liquids



_______________________________________________________________________________________________30-221 Log #131 FLC-TAN


Revise text to read as follows:24.10.1 Storage tank buildings storing Class I liquids, hazardous liquids or Class II or Class IIIA liquids at

temperatures at or above their flash points shall be ventilated at a rate ………………….

This includes hazardous liquids and includes all heated Class III liquids This changes corresponds toproposed new section 18.5.1.1

Revise 24.10.1 to read as follows:"24.10.1 Storage tank buildings storing Class I liquids, or Class II or Class IIIA liquids at temperatures at or above their

flash points shall be ventilated at a rate sufficient to maintain the concentration of vapors within the building at or below25 percent of the lower flammable limit. Compliance with 24.10.2 through 24.10.7 shall be deemed as meeting the

requirements of 24.10.1."

This is consistent with the amendments made in Proposals 30-150 (Log #CP27), 30-185 (Log

#CP28), and 30-208 (Log #CP29). See also Proposal 30-215 (Log #127).

_______________________________________________________________________________________________30-222 Log #132 FLC-TAN


Revise text to read as follows:24.10.3. Ventilation shall be accomplished by natural or mechanical ventilation, with discharge or exhaust to a safe

location outside the building so that vapors will not be trapped by eaves or other obstructions and shall be at least 5 ft(1.5 m) from building openings and at least 15 ft (4.5 m) from powered ventilation air intake devices.

This includes safe venting equirements from 28.8.1.1

The proposal attempts to apply the location criteria for a tank vent to general building

ventilation. FLCTAN asks the FLCOPS to develop criteria that can be referred to in the annex.




Revise text to read as follows:24.10.3.1 Recirculation of exhaust air shall be permitted only when it is monitored continuously using a fail safe

system that is designed to automatically sound an alarm, stop recirculation and provide full exhaust to the outside in theevent that a vapor air mixtures having a concentrations over 25 of the lower flammable limit or a hazardous toxicatmosphere that is above a predetermined limit is detected.

This includes requirements for hazardous atmospheres



_______________________________________________________________________________________________30-224 Log #134 FLC-TAN


Revise text to read as follows:24.10.7 (2). A vapor detection system set to sound a warning alarm at a constantly attended location at 25 percent of

the lower flammable limit or at a predetermined level of a hazardous atmosphere, and to start the mechanical ventilationsystem.

This adds requirements for hazardous atmospheres



_______________________________________________________________________________________________30-225 Log #135 FLC-TAN


Revise text to read as follows:24.13.5 Vents shall terminate at a safe area outside the building.

This adds requirements for safely venting hazardous vapors

Revise 24.13.5 to read as follows:

24.13.5 Vents shall terminate outside the building in accordance with 27.8.1.

This amendment applies the correct criteria as set forth in Chapter 27.




Revise text to read as follows:24.14.3 Each liquid transfer connection on any tank storing Class I or Class II liquids, or hazardous liquids or Class III

liquids heated at or above their flash points inside buildings shall be provided with one of the following

This adds requirements for safely transferring heated Class III liquids and hazardous liquids



_______________________________________________________________________________________________30-227 Log #137 FLC-TAN


Revise text to read as follows:24.14.6 Openings for manual gauging of Class I or Class II liquids, or hazardous liquids or Class III liquids heated at or

above their flash points shall be provided with a vaportight cap or cover that shall be kept closed when not in use.This adds requirements for safely protecting gauging openings for heated Class III liquids and

hazardous liquids



_______________________________________________________________________________________________30-228 Log #138 FLC-TAN


Revise text to read as follows:24.14.8 Tanks storing Class I, Class II, or Class IIIA liquids, or hazardous liquids inside buildings shall be equipped

with a device or other means shall be provided, to prevent overflow into the building.This adds requirements for safely storing hazardous liquids

At this time, hazards other than fire and explosion are not within the scope of the NFPA 30,


_______________________________________________________________________________________________30-229 Log #180 FLC-TAN


Revise text to read as follows:25.3.1.2 Vaults shall be constructed and listed in accordance with ANSI/UL 2245, Standard for Below-Grade Vaults for

Flammable Liquid Storage Tanks.Delete ANSI approval designation from UL 2245.




Revise text to read as follows:25.5.1.1 The top of an aboveground vault that contains a tank storing Class I or Class II liquid, or Class III Liquid at

temperatures at or above its flash point, shall be constructed of noncombustible material and shall be designed to beweaker than the walls of the vault to ensure that the thrust of any explosion inside the vault is directed upward beforedestructive internal pressure develops within the vault.

This adds requirements for Class IIIB liquids stored at high temperatures.

Do not change the existing text. See Proposals 30-150 (Log #CP27) and 30-185 (Log #CP28).

See Proposals 30-150 (Log #CP27) and 30-185 (Log #CP28).

_______________________________________________________________________________________________30-231 Log #140 FLC-TAN


Revise text to read as follows:25.5.1.2 The top of an at-grade or below-grade vault that contains a tank storing Class I liquid or a Class II or Class III

liquid at a temperature at or above its flash point, shall be designed to relieve or contain the force of any explosionoccurring inside the vault

This adds requirements for Class III liquids stored at high temperatures.



_______________________________________________________________________________________________30-232 Log #141 FLC-TAN


Revise text to read as follows:25.15.2 The vapor detection system shall sound an alarm when the system detects vapors that reach or exceed 25

percent of the lower flammable limit of the liquid stored or reach a predetermined level of a hazardous atmosphere,This adds requirements for hazardous atmospheres for similar requirements






Revise text to read as follows:27.1.1 This chapter shall apply to the design, installation, testing, operation and maintenance of piping systems for

flammable, hazardous and combustible liquids or vaporsThis adds requirements for hazardous liquids in pipes



_______________________________________________________________________________________________30-234 Log #143 FLC-TAN


Revise text to read as follows:27.3.2 Piping systems shall be maintained liquid tight. A piping system that has leaks that constitute a hazard shall be

repaired in a manner acceptable to the authority having jurisdiction or it shall be emptied of liquid, vapor freed and shallno longer be used. repaired in a manner acceptable to the authority having jurisdiction

This adds requirements for vapor freeing and no longer using leaky pipes

_______________________________________________________________________________________________30-235 Log #144 FLC-TAN


Revise text to read as follows:27.5.3.2 Where such joints are used aboveground, either the piping shall be secured to prevent disengagement of the

fitting or the piping system shall be designed that any spill or leak resulting from disengagement will not expose persons,important buildings, or structures and controlled by remote valves.

This adds requirements for leaks (see definitions) in addition to spills.

_______________________________________________________________________________________________30-236 Log #145 FLC-TAN


Revise text to read as follows:27.7.3.1 Piping that could contain a Class I, Class II, or Class IIIA liquid or vapor or a Class IIIB liquid at a temperature

at or above its flash point, shall not be tested using air.This adds requirements for Class IIIB heated liquids

There is no perceived hazard. It is very unlikely that there would be a high temperature

involved in testing a piping system.




Revise text to read as follows:27.8.1.1 Where the outlets for vent pipes for tanks storing class I liquids, or hazardous liquids, or class II or class III

liquids at temperatures at or above their flash points are adjacent to buildings or public ways, they shall be located sothe vapors are released at a safe point outside of buildings and not less than 12 ft (3.6 m) above the adjacent groundlevel

This adds Class II and Class III heated liquids

There is no technical justification for this proposal. There is no perceived hazard and it is veryunlikely that vapors emanating from a vent would be at a high temperature. As to the reference to hazardous liquids,

hazards other than fire and explosion are not within the scope of NFPA 30.

_______________________________________________________________________________________________30-238 Log #147 FLC-TAN


Revise text to read as follows:27.8.1.3 Vent outlets shall be located so that vapors will not be trapped by eaves or other obstructions and shall be at

least 5 ft (1.5 m) from building openings and at least 15 ft (4.5 m) from powered ventilation air intake devices.This adds underground tank venting requirements from 27.8.2

_______________________________________________________________________________________________30-239 Log #148 FLC-TAN


Revise text to read as follows:27.8.2.13 Vent piping for tanks storing class I liquids, or hazardous liquids or class II or III liquids at temperatures at or

above their flash points, shall not be manifolded with vent piping for tanks storing hazardous liquids or class II or class IIIliquids at temperatures below their flash points, unless positive means are provided to prevent the following:(1) Vapors of class I liquids or of Class II or Class III liquids at temperatures at or above their flash points from entering

tanks storing hazardous liquids or Class II or class III liquids at temperatures below their flash points

(3) Possible change in classification of the less volatile or less hazardous liquidThis adds tank venting requirements for Class II and III liquids that are heated and for hazardous

liquids

There is no technical substantiation for this proposal.




New text to read as follows:A 21.7.4.3.6 Disposal of Tanks:Tanks that have contained leaded products or other toxic or hazardous materials shall not be recycled unless cleaned,

detoxified and declared to be hazard free. Tanks that have contained leaded products shall not be used or recycled forthe subsequent storage of food or liquids intended for human or animal consumption unless such tanks have been firstcleaned down to bare metal and certified to be lead free

This new text provides precautions for tanks that contained leaded products and other hazardousmaterials

This issue is more appropriately within the scope of NFPA 326, Standard for the Safeguardingof Tanks and Containers for Entry, Cleaning, or Repair. The proposal should more properly be submitted to the

Technical Committee on Tank Leakage and Repair Safeguards for action.

_______________________________________________________________________________________________30-267 Log #18 FLC-TAN


Revise text as follows:A.22.5.2.4 For further information, see ASTM E 119, Standard Test Methods for Fire Tests of Building Construction

and Materials, and ANSI/UL 1709, Standard for Rapid Rise Fire Tests of Protection Materials for Structural Steel.The ANSI designation should be added to UL 1709 to reflect the ANSI approval of the referenced

standard.

_______________________________________________________________________________________________30-268 Log #181 FLC-TAN


Revise text to read as follows:A.22.7.4 Vent sizing formulae and prescriptive vent sizes, such as those established by ANSI/UL 142, Standard for

Steel Aboveground Tanks for Flammable and Combustible Liquids, are typically based on the direct installation of aventing device on to a tank with a nipple not exceeding 12 in. (300 mm).When the outlet of a vent must be extended to a remote location, such as for tanks located in buildings, which require

vent discharges to be located outside,k a significant reduction in vent flow can occur unless the size of the vent andconnecting piping is increased. In such cases, the size of vents and vent pipe extensions should be calculated to ensurethat a tank will not be over-pressurized during a fire exposure.

Add ANSI approval designation to ANSI/UL 142.




Revise text as follows:A.23.3.4(1) Acceptable design standards for cathodic protection systems include the following:(1) API RP 1632, Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems(2) CAN/ULC-S603.1M, Standard for Galvanic External Corrosion Protection Systems for Steel Underground Tanks for

Flammable and Combustible Liquids(3) STI-P3, Specification and Manual for External Corrosion Protection of Underground Steel Storage Tanks(4) NACE RP-0169, Recommended Practice, Control of External Corrosion on Underground or Submerged Metallic

Piping Systems(5) NACE RP-0285, Recommended Practice, Corrosion Control of Underground Storage Tank Systems by Cathodic

Protection(6) ANSI/UL 1746, Standard for External Corrosion Protection Systems for Steel Underground Storage Tanks, Part 1(7) STI RP 892, Recommended Practice for Corrosion of Underground Piping Networks Associated with Liquid Storage

and Dispensing SystemsThe ANSI designation should be added to UL 1746 to reflect the ANSI approval of the referenced

standard. The title of CAN/ULC-S603.1 has been revised to reflect the update to the most recent edition.

_______________________________________________________________________________________________30-270 Log #20 FLC-TAN


Revise text as follows:A.27.4.3.2 For further information, see ASTM E 119, Standard Test Methods for Fire Tests of Building Construction

and Materials, ANSI/UL 263 Standard for Fire Tests of Building Construction and Materials and ANSI/UL 1709,Standard for Rapid Rise Fire Tests of Protection Materials for Structural Steel.

ANSI/UL 263 provides similar performance to ASTM E 119 and are jointly referenced in other NFPApublications. See NFPA 5000-7.2.3.2.20 for an example. The ANSI designation should be added to UL 1709 to reflectthe ANSI approval of the referenced standard.

_______________________________________________________________________________________________30-271 Log #182 FLC-TAN


Revise text as follows:A.27.8.1.6 Vent sizing formulae and prescriptive vent sizes, such as those established by ANSI/UL 142, Standard for

Steel Aboveground Tanks for Flammable and Combustible Liquids, are typically based on the direct installation of aventing device onto a tank. When the outlet of a vent must be extended to a remote location, such as for tanks locatedin buildings, which require vent discharges, to be located outside, a significant reduction in vent flow can occur unlessthe size of the vent and connecting piping is increased. In such cases, the size of vents and vent pipe extensions shouldbe calculated to ensure that a tank will not be over-pressurized during a fire exposure.

Add ANSI approval designation to ANSI/UL 142.




Add a new Annex item, A.27.8.2.1 to read:"API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities

Classified as Class I, Division 1 and Division 2, and API RP 505, Recommended Practice for Classification of Locationsfor Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2, establish a 10-foot(3 m) classified zone around most tank vents that are potential sources of ignitable vapors. However, neither documentprovides specific distances for a below grade tank. Applying these strategies to 27.8.2.1 resulted in a minimum heightfor these tank vents of 10 feet above grade. Since the majority of these vents exist at retail service station tanks andsince vehicles and other publicly-introduced ignition sources could be located close to the vent, an additional 2 feet wasadded to the minimum height as a safety factor to ensure the vehicle does not introduce a potential ignition source intothe vapor space surrounding the vent. This results in a total height for the vent stack from a below grade tank of 12feet."

This explains the rationale behind the requirement.


Documents

Committee on NFPA 30 · PDF filethe design pressure of other atmospheric tanks when filling or emptying the tank or because of atmospheric temperature changes. Low-pressure tanks and