ANSI Z21.54__2014

ANSI Z21.54-2014 • CSA 8.4-2014

Gas hose connectors for portable outdoorgas-fired appliances

Provided by IHS Licensee=University of Alberta/5966844001, User=sharabiani, shahramfsNot for Resale, 09/25/2014 23:03:48 MDTNo reproduction or networking permitted without license from IHS

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ANSI Z21.54-2014 • CSA 8.4-2014June 2014

Title: Gas hose connectors for portable outdoor gas-fired appliances

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American National Standards Institute, Inc.Interprovincial Gas Advisory Council

Approved on March 14, 2014 by ANSIApproved on May 30, 2014 by IGAC

Effective in Canada September 1, 2015

Gas hose connectors for portableoutdoor gas-fired appliances

ANSI Z21.54-2014 • CSA 8.4-2014


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ANSI Z21.54-2014 • CSA 8.4-2014 Gas hose connectors for portable outdoor gas-fired appliances

June 2014 © 2014 CSA Group 1

ContentsInterprovincial Gas Advisory Council 2

Canadian Technical Committee on Gas Appliances and Related Accessories 4

Z21/83 Technical Committee on Performance and Installation of Gas Burning Appliances and RelatedAccessories 6

Z21/CSA Joint Technical Advisory Group on Connectors for Gas Appliances 9

Preface 11

1 Scope 13

2 Reference publications 14

3 Definitions 15

4 Construction 164.1 General 164.2 Materials 174.3 Connector dimensions 184.4 Structure of gas conduit 184.5 Fittings — design and dimensions 184.6 Instructions 204.7 Marking 21

5 Performance 225.1 General 225.2 Leakage 225.3 Capacity 235.4 Strength, flexibility and temperature resistance of conduit 245.5 Reconnection of fittings 265.6 Strength of fittings 275.7 Season cracking 28

6 Manufacturing and production tests 28

Annex A(normative) — Items unique to one country (Canada) 30Annex B (informative) — Table of conversion factors 31


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Interprovincial Gas Advisory Council

J. Renaud Régie du bâtiment du Québec,Montréal, Québec, Canada

Chair

J.R. Marshall Technical Standards & Safety Authority (TSSA),Toronto, Ontario, Canada

Vice Chair

A. Ali Government of Nunavut Community & GovernmentServices,Iqaluit, Nunavut, Canada

R. Brousseau Régie du Bâtiment du Québec,Montréal, Québec, Canada

M.E. Davidson Province of New Brunswick Dept of Public Safety,Fredericton, New Brunswick, Canada

A. Durnie Alberta Municipal Affairs,Edmonton, Alberta, Canada

Alternate

D. Eastman Service NL, Newfoundland & Labrador,St. John's, Newfoundland and Labrador, Canada

P. Fowler Nova Scotia Department of Labour AdvancedEducation,Halifax, Nova Scotia, Canada

D.N. Hird SaskPower,Regina, Saskatchewan, Canada

C. Lashek Manitoba, Office of the Fire Commissioner,Winnipeg, Manitoba, Canada

W. Lock British Columbia Safety Authority (BCSA),New Westminster, British Columbia, Canada

S.C. Manning Alberta Municipal Affairs Safety Services,Edmonton, Alberta, Canada

R. McRae Government of the NWT Public Works & Services,Yellowknife, Northwest Territories, Canada


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J. Melling SaskPower,Saskatoon, Saskatchewan, Canada

Alternate

B.W. Reid Department of Environment, Energy and Forestry,Charlottetown, Prince Edward Island, Canada

G. Tremblett Service NL, Newfoundland & Labrador,St. John's, Newfoundland and Labrador, Canada

Alternate

C. Valliere Alberta Municipal Affairs Safety Services,Edmonton, Alberta, Canada

Alternate

M. Wani Government of Nunavut Dept of Community &Government Services,Nunavut, Northwest Territories, Canada

D. Young Yukon Government,Whitehorse, Yukon, Canada

B. Zinn British Columbia Safety Authority (BCSA),Coquitlam, British Columbia, Canada

Alternate


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Canadian Technical Committee on GasAppliances and Related Accessories

Z.J. Fraczkowski Technical Standards & Safety Authority (TSSA),Toronto, Ontario, CanadaCategory: Government and/or Regulatory Authority

Chair

A. Gould Reliance Comfort Ltd. Partnership dba Reliance HomeComfort,Cambridge, Ontario, CanadaCategory: User Interest

Vice-Chair

A. Abdel-Rehim A.O. Smith Enterprises Ltd.,Fergus, Ontario, Canada

Associate

P.A. Baker Maxitrol Company,Hamilton, Ontario, CanadaCategory: Producer Interest

D. Baxter Enbridge Gas Distribution,Thorold, Ontario, CanadaCategory: User Interest

J. Boros Rheem Sales Co Inc AKA RheemManufacturing Co,Montgomery, Alabama, USACategory: Producer Interest

T. Brennan Natural Resources Canada,Ottawa, Ontario, Canada

Associate

C. Côté Gaz Métro,Montréal, Québec, CanadaCategory: User Interest

C. Gibbs Guelph, Ontario, CanadaCategory: General Interest

E. Grzesik Missisauga, Ontario, CanadaCategory: General Interest

D.N. Hird SaskPower,Regina, Saskatchewan, CanadaCategory: Government and/or Regulatory Authority


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D.R. Jamieson GHP Group Inc,Oakville, Ontario, CanadaCategory: Producer Interest

C.E. Jorgenson British Columbia Safety Authority (BCSA),New Westminster, British Columbia, CanadaCategory: Government and/or Regulatory Authority

S. Katz S. Katz and Associates Inc.,North Vancouver, British Columbia, Canada

Associate

J.R. Marshall Technical Standards & Safety Authority (TSSA),Toronto, Ontario, Canada

Associate

J. Melling SaskPower,Saskatoon, Saskatchewan, Canada

Associate

J. Overall Union Gas Limited,Toronto, Ontario, Canada

Associate

T.W. Poulin A.O. Smith Enterprises Ltd.,Fergus, Ontario, CanadaCategory: Producer Interest

G.B. Prociw Union Gas Limited,Chatham, Ontario, CanadaCategory: User Interest

E. Scott British Columbia Safety Authority (BCSA),New Westminster, British Columbia, Canada

Associate

B.J. Swiecicki National Propane Gas Association,Frankfort, Illinois, USA

Associate

M. Thomas Natural Resources Canada CANMET Energy,Ottawa, Ontario, Canada

Associate

C.L. Rake CSA Group,Cleveland, Ohio, USA

Project Manager

M. Khan CSA Group,Mississauga, Ontario, Canada

Project Manager


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Z21/83 Technical Committee onPerformance and Installation of GasBurning Appliances and RelatedAccessories

B.J. Swiecicki National Propane Gas Association,Frankfort, Illinois, USACategory: Gas Supplier Interest

Chair

M.W. Wilber Crane Engineering,Plymouth, Minnesota, USACategory: General Interest

Vice-Chair

C.W. Adams A.O. Smith Corporation,Milwaukee,Wisconsin, USACategory: Producer Interest

S.R. Caudle Southern California Gas Company,Los Angeles, California, USA

Alternate

M. Deegan Clearwater Gas System,Clearwater, Florida, USACategory: Government and/or Regulatory Authority

M. Diesch Lennox International Inc,Carrollton, Texas, USACategory: Producer Interest

R. Ehsan Association of Home Appliance Manufacturers(AHAM),Washington, , USA

Alternate

J.M. Emmel Virginia Tech,Blacksburg,Virginia, USACategory: Consumer/User Interest

Z.J. Fraczkowski Technical Standards & Safety Authority (TSSA),Toronto, Ontario, Canada

Associate

R.R. Frazier ATMOS Energy,Arlington, Texas, USACategory: Gas Supplier Interest


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M. Garcia Sempra Energy Utility,Los Angeles, California, USACategory: Gas Supplier Interest

T.F. Hardin Underwriters Laboratories Inc.,Research Triangle Pk, North Carolina, USA

Alternate

D.M. Jakobs RheemManufacturing Company Air ConditioningDivision,Fort Smith, Arkansas, USACategory: Producer Interest

R.A. Jordan Consumer Product Safety Commission,Rockville, Maryland, USA

Non-Voting

A. Lanier Papageorge AGL Resources Inc.,Atlanta, Georgia, USACategory: Producer Interest

F. Myers PVI Industries LLC,Fort Worth, Texas, USACategory: Producer Interest

D. Parker Western Industries, Inc. Engineered Products Group,Watertown,Wisconsin, USA

Associate

G.J. Potter Heater Technologies, LLC,Marthasville, Missouri, USACategory: Producer Interest

J.A. Ranfone American Gas Association Inc.,Washington, District of Columbia, USACategory: Gas Supplier Interest

N.W. Rolph Lochinvar LLC,Lebanon, Tennessee, USA

Alternate

G.A. Ruzicka Lowe's Companies, Inc,Mooresville, North Carolina, USACategory: General Interest

I. Sargunam Bloomington, Indiana, USACategory: General Interest


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C. Souhrada North American Association of Food EquipmentManufacturers,Chicago, Illinois, USACategory: Producer Interest

F.A. Stanonik Air-Conditioning, Heating, and Refrigeration Institute,Arlington, Virginia, USA

Non-Voting

T. Stroud Hearth Patio & Barbecue Association,Seattle,Washington, USACategory: General Interest

C. Suchovsky Burner Technology Unlimited, Inc,Walton Hills, Ohio, USACategory: General Interest

H. Virgil Brownsburg, Indiana, USACategory: Consumer/User Interest

A.B. Wagner-Sherwin St. Louis Community College,St. Louis, Missouri, USACategory: Consumer/User Interest

M.B. Williams Association of Home Appliance Manufacturers(AHAM),Washington, District of Columbia, USACategory: Producer Interest

R. Wozniak Underwriters Laboratories Inc.,Melville, New York, USACategory: Research/Testing


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Z21/CSA Joint Technical Advisory Group onConnectors for Gas Appliances

A. Foti Hose Master, LLC,Cleveland, Ohio, USA

Chair

D. Abbate Air-Conditioning, Heating, and Refrigeration Institute,Arlington, Virginia, USA

M. Angus Dormont Manufacturing Co.,Export, Pennsylvania, USA

P.A. Baker Maxitrol Company,Hamilton, Ontario, Canada

S.R. Caudle Southern California Gas Company,Los Angeles, California, USA

B. Diel M.B. Sturgis Inc.,St. Louis, Missouri, USA

R. Dominguez Brass-Craft Manufacturing Co,Novi, Michigan, USA

Alternate

Z.J. Fraczkowski Technical Standards & Safety Authority (TSSA),Toronto, Ontario, Canada

Associate

R. Green Brass-Craft Manufacturing Co,Novi, Michigan, USA

Alternate

T.L. Jackson Accuflex Industrial Hose Limited,Guelph, Ontario, Canada

S. McTier Propane Technologies LLC,Lake Forest, Illinois, USA

T.D. Mulligan Brass-Craft Manufacturing Co,Novi, Michigan, USA

C. Olds PERC,Washington, District of Columbia, USA


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W. Ring Fairview Fittings & Manufacturing Limited,Toronto, Ontario, Canada

F.A. Stanonik Air-Conditioning, Heating, and Refrigeration Institute,Arlington, Virginia, USA

Alternate

E. Wolf Cavagna North America,Mansfield, Ohio, USA


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PrefaceThis is the third edition of ANSI Z21.54 • CSA 8.4, Gas hose connectors for portable outdoor gas-firedappliances. It supersedes the previous edition published in 1996 and 2002

This Standard was prepared by the Z21/CSA Joint Technical Advisory Group on Standards for Connectorsfor Gas Appliances, under the jurisdiction of the Technical Committee on Performance and Installation ofGas Burning Appliances and Related Accessories and the Strategic Steering Committee on Standards forGas Appliances and Related Accessories, and had been formally approved by the Technical Committee(s),American National Standards Institute, and the Interprovincial Gas Advisory Council.

Interpretations: The Strategic Steering Committee on Standards for Gas Appliances and RelatedAccessories has provided the following direction for the interpretation of standards under its jurisdiction:“The literal text shall be used in judging compliance of products with the safety requirements of thisStandard. When the literal text cannot be applied to the product, such as for new materials orconstruction, and when a relevant committee interpretation has not already been published, CSA'sprocedures for interpretation shall be followed to determine the intended safety principle.”Notes:1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.2) This Standard contains SI (Metric) units corresponding to the yard/pound quantities, the purpose being to

allow the standard to be used in SI (Metric) units. (IEEE/ASTM SI 10, American National Standard for MetricPractice, or ISO 80000-1:2009, Quantities and units – Part 1: General, is used as a guide in making metricconversion from yard/pound quantities.) If a value for a measurement and a corresponding value in otherunits are stated, the first stated value is to be regarded as the requirement. The given corresponding valuemay be approximate. If a value for a measurement and a corresponding value in other units are both specifiedas a quoted marking requirement, the first stated unit, or both, are to be provided.

3) Although the intended primary application of this Standard is stated in its Scope, it is important to note that itremains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

4) This publication was developed by consensus, which is defined by CSA Policy governing standardization – Codeof good practice for standardization as “substantial agreement. Consensus implies much more than a simplemajority, but not necessarily unanimity.” It is consistent with this definition that a member may be included inthe Technical Committee list and yet not be in full agreement with all clauses of this publication.

5) This Standard is subject to review five years from the date of publication, and suggestions for its improvementwill be referred to the appropriate committee. To submit a proposal for change, please send the followinginformation to [email protected] and include “Proposal for change” in the subject line:a) Standard designation (number);b) relevant clause, table, and/or figure number;c) wording of the proposed change; andd) rationale for the change.

6) To submit a request for interpretation of this Standard, please send the following information [email protected] and include “Request for interpretation” in the subject line:a) define the problem, making reference to the specific clause, and, where appropriate, include an

illustrative sketch;b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the

issue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.


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History of development of the standard for gas hose connectors forportable outdoor gas-fired appliancesNote: This History is informative and is not part of the standard.

With the onset of the Free Trade agreement between the United States and Canada on January 2, 1988,significant attention was given to the harmonization of the United States and Canadian safety standardsaddressing gas-fired equipment for residential, commercial and industrial applications. It was believedthat the elimination of the differences between the standards would remove potential trade barriers andprovide an atmosphere in which North American manufacturers could market more freely in the UnitedStates and Canada. The harmonization of these standards was also seen as a preliminary step towardharmonization with international standards.

With the formation of joint subcommittees a Canadian Gas Association Standards Steering Committee onGas Burning Appliances and Related Accessories was established to parallel and to support the formationof joint subcommittees. Operating procedures, in accordance with American National Standards Instituteprocedures, for joint subcommittees were developed and subsequently approved by ANSI on April 1,1993.

A draft harmonized standard for Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances, ANSIZ21.54, was prepared during 1993. At its September 23-24, 1993 meeting, the Joint Subcommittee onStandards for Gas Appliance Connectors adopted the first draft harmonized standard for gas hoseconnectors for distribution for review and comment during August 1994.

Following reconsideration and modification of the proposed draft standard for gas hose connectors inlight of comments received, the joint connector subcommittee, at its September 20, 1994 meeting,recommended the proposed fourth draft to the Z21 Committee and the CGA Standards SteeringCommittee for approval.

The proposed draft of the harmonized standard for gas hose connectors was approved by the Z21Committee at its April 1995 meeting. The CGA Standards Steering Committee approved the proposeddraft harmonized standard for gas hose connectors by letter ballot dated May 19, 1995.

The first edition of the harmonized Z21/CGA standard for Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances was approved by the CGA Standards Advisory Committee and the CanadianInterprovincial Gas Advisory Council on July 1,1995 and by the American National Standards Institute,Inc., on July 16, 1996.

The previous editions of the gas hose connectors for portable outdoor gas-fired appliances, and addendathereto, approved by the Interprovincial Gas Advisory Council and American National Standards Institute,Inc. are as follows:

Z21.54-2002 • CSA 8.4-2002Z21.54a-2006 (R2001) • CSA 8.4a-2006Z21.54b-2009 • CGA 8.4b-2009

This the third edition was approved by the Canadian Interprovincial Gas Advisory Council onMay 30, 2014 and by the American National Standards Institute, Inc., on March 14, 2014

The following identifies the designation and year of the third edition of the standard:

ANSI Z21.54-2014 • CSA 8.4-2014


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ANSI Z21.54-2014 • CSA 8.4-2014Gas hose connectors for portable outdoorgas-fired appliances

1 Scope

1.1This Standard applies to gas hose connectors (See Clause 3 Definitions), hereinafter referred to asconnectors. They are conduits for conveying gas and depend for gas-tightness on the wall structure ofthe hose material. Such connectors shall be:a) newly produced and constructed entirely of new, unused parts and materials; andb) equipped with a fitting at each end provided with standard taper pipe threads.

1.2Connectors covered by this Standard are intended for:a) connection of portable outdoor gas-fired appliances to the gas supply piping;b) use in unconcealed outdoor locations;c) use only in locations where they will not be likely to be subject to excessive temperatures [above

200°F (93.5°C)];d) use with natural gas , manufactured gas, mixed gases, propane and LP gas-air mixtures; ande) use on gas piping systems having fuel gas pressures not in excess of 1/2 psi (3.45 kPa).

1.3All references to psi throughout this Standard are to be considered gauge pressure unless otherwisespecified.

1.4Annex A contains provisions that are unique to Canada.

1.5Clause 2 contains a list of standards specifically referenced in this Standard and sources from which thesereference standards may be obtained.

1.6This Standard contains SI (Metric) equivalents to the yard/pound quantities, the purpose being to allowthe standard to be used in SI (Metric) units. (IEEE/ASTM-SI-10 is used as a guide in making metricconversion from yard/pound quantities.) If a value for a measurement and an equivalent value in otherunits, the first stated is to be regarded as the requirement. The given equivalent value may beapproximate. If a value for a measurement and an equivalent value in other units, are both specified as aquoted marking requirement, the first stated unit, or both shall be provided.

1.7In this Standard, “shall” is used to express a requirement, i.e., a provision that the user shall satisfy inorder to comply with the standard; “should” is used to express a recommendation or that which is


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advised but not required; and “may” is used to express an option or that which is permissible within thelimits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of anote accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written asrequirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define theirapplication.

2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to theedition listed below including all amendments published thereto.

CSA GroupANSI Z21.41–2014•CSA6.9–2014Quick Disconnect Devices for Use With Gas Fuel

CSA B149.1–10Natural Gas and Propane Installation Code

American Gas Association (AGA)ANSI Z223.1/NFPA 54National Fuel Gas Code

American Society of Mechanical Engineers (ASME)ASME B1.20.1–2013Pipe Threads, General Purpose (Inch)

ASME B1.20.3–1976 (R2013)Dryseal Pipe Threads (Inch)

American Society for Testing and Materials (ASTM)IEEE/ASTM-SI-10, Formerly ASTM E380-1993 (R1997)Standard Practice for Use of the International System of Units (SI), the Modernized Metric System

ASTM A197/A197M-00 (2011)Standard Specification for Cupola Malleable Iron

ASTM B858-06 (2012)Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress CorrosionCracking in Copper Alloys


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3 DefinitionsThe following definitions shall apply in this Standard.

Adaptor— as used in this Standard, a metal fitting designed to connect standard taper pipe threads tothe connector nut.

Appliance— all gas utilization equipment.

Capacity— as used in this Standard, the amount of a specified gas that will flow through a connector ata specified pressure drop in a fixed period of time.

Conduit, gas — the gas passageway of the connector.

Connecter, gas appliance— a factory-fabricated assembly of gas conduit and related fittings designed toconvey gaseous fuel, and used for making connections between a gas supply piping outlet and the gasinlet to an appliance. It is equipped at each end for attachment to standard taper pipe threads. A gasappliance connector is not for vibration isolation.

Connector, movable gas appliance— a connector for use with appliances (including all commercialcooking appliances) that may or may not be equipped with castors and that under conditions ofnormal use, are moved on a regular basis. A connector of this type is for occasional but notcontinuous movement. Connectors of this type may be used with quick disconnect devices.

Metal connector— a connector with a gas conduit made entirely of metal. It is not designed forrepeated movement after being connected nor for repeated disconnecting and connecting.

Corrugated connector— a metal connector having the gas conduit fabricated of metal tubingformed into helical or annular corrugations.

Semi-rigid connector— a metal connector having the gas conduit fabricated of semi-rigid metal.

Other than all-metal connector— a connector having metal fittings, but with the gas conduit beingof a non-metallic material. The gas conduit is protected by a metal sheath. It is not designed forrepeated movement after being connected nor for repeated disconnecting and reconnecting.

Connector, gas hose— a connector designed for use only with portable gas-fired equipment. The gasconduit depends for gas-tightness on the wall structure of the hose material. The conduit may besupported with internal metal or other reinforcement. The design and application presuppose that theconnector will not be pressurized when the appliance served by the connector is not in use. Gas hoseconnector includes:

Gas hose connector for portable indoor gas-fired equipment— a gas hose connector for use onlywith laboratory, shop or ironing equipment used indoors that requires mobility during operation.

Gas hose connector for portable outdoor gas-fired appliances— a gas hose connector for use withportable gas-fired equipment used outdoors.

Connector nut— a threaded nut permanently attached to a connector conduit which mates with anadapter or gas valve to form a union joint.

Portable appliance— as used in this standard, an appliance which can be carried or easily moved,usually by one person, and designed to be supplied with gaseous fuel through a gas hose connector.


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Propane— A liquefied petroleum gas that is classified as either “commercial propane” or “Special-Duty”propane in accordance with ASTM D1835 “Standard Specification for Liquefied Petroleum (LP) Gases.”Special-Duty propane is equivalent to Propane HD-5.

Propane HD-5— propane that complies with the same requirements as “Special-Duty” propane, asdefined by ASTM D1835, Standard Specification for Liquefied Petroleum (LP) Gases.

4 Construction

4.1 General

4.1.1The construction of tubing and fittings not specifically covered by this Standard shall be in accordancewith reasonable concepts of safety, substantiality and durability.

All requirements as to construction set forth herein may be satisfied by the construction actuallyprescribed or such other construction as will provide at least equivalent performance.

4.1.2Materials used in connector construction shall not chemically react with each other.

4.1.3Nonmetallic exterior parts or coatings shall not continue to burn after an ignition source has beenremoved.

Method of TestThis test shall be conducted in a draft free location.

One 2 ft (610 mm) connector shall be used for test purposes, and the connector shall be exposed to arelative humidity greater than 70 percent during the 24 hour period prior to the test.

The connector under test shall be supported at one end and hung with its axis vertical.

A Bunsen burner having a nominal 3/8 in diameter tube and with means for controlling the primary airand gas input shall be used as an ignition source. The gas at the burner shall be ignited and adjusted toproduce flame 2 to 3 in (50.8 to 76.2 mm) in length.

The flame shall be applied to the nonmetallic exterior approximately 3 in (76.2 mm) above the start ofthe exterior coating at the bottom end of the connector for 1 minute (by orienting the burner at an angleas needed to ignite the nonmetallic exterior or coating) and then withdrawn. If no burning, flaming orglowing combustion is observed, additional attempts to ignite the nonmetallic exterior covering of theconnector shall be made with the flame varied from blue to yellow. If flaming or glowing combustion ofthe covering material on the connector is observed and ceases 60 seconds or less after removal of theignition flame, the flame is to be reapplied at the same location for 1 minute immediately after theflaming or glowing combustion stops. The ignition flame shall then be withdrawn and the duration of theflaming or glowing combustion noted.


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The duration of flaming or glowing combustion after withdrawal of the ignition flame shall not exceed 60seconds, nor shall any flame or glowing combustion travel to the end of the connector farthest from thepoint of application of the ignition flame.

4.2 Materials

4.2.1Within commercial tolerances, materials used in the construction of fittings for connectors shall meet therequirements shown in Table 1, Materials for fittings, and satisfactory evidence of this fact shall befurnished to the testing agency for all fittings submitted for test.

Table 1Materials for fittings

(See Clause 4.2.1.)

Type of fitting Requirement

Pure copper Prohibited when in contact with fuel gas

Cast malleable iron Prohibited

Shall conform to ASTM A197 and shall beprotected with a corrosion-resistant metallic finishsuch as cadmium plate or galvanized.

Steel Protected with corrosion-resistant finish such ascadmium plate or galvanized

Brass machined 60% Cu minimum85% Al maximum

Aluminum-alloy 86% Al maximum

All others Shall be reasonable in accord with the above

4.2.2Fittings shall be of good quality with respect to material, workmanship and design.

4.2.3Materials used in the interior construction of the connector shall be resistant to deterioration from fuelgases.

4.2.4The manufacturer shall supply evidence suitable to the testing agency that materials used in the exteriorconstruction of a connector are resistant to deterioration from the following conditions or substances:a) moistureb) dirtc) ozoned) fertilizerse) mineral and vegetable oils and greasef) common household chemicals likely to be used outdoorsg) prolonged exposure to sunlight


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h) prolonged exposure to freezing temperatures.

4.3 Connector dimensions

4.3.1The nominal length of a connector shall not exceed 15 ft (4.57 m). The nominal length shall refer to theoverall length, including fittings. The actual length of any sample shall be within minus 1/2 in (12.7 mm)to plus 2 in (50.8 mm) of its nominal length.

4.3.2The nominal internal diameter of a connector shall not be less than 3/8 in (9.5 mm) no more than 3/4 in(19.1 mm). The nominal internal diameter shall refer to the finished internal diameter of the conduit, oran internal metallic supporting means. The actual internal diameter of the conduit shall not be more than0.025 in (0.635 mm) less than its nominal size, as determined by inserting a cylindrical rod of the properdiameter into the end of the conduit for 1 in (25.4 mm).

4.4 Structure of gas conduit

4.4.1When metal helix is used in the construction of gas conduit, it shall be of one continuous length withoutsplices or other joints.

4.4.2Gas-ways through the conduit and ends shall be free from cement or any other foreign material.

4.5 Fittings— design and dimensions

4.5.1Fittings shall be faced or otherwise finished externally to provide a hexagonal or octagonal wrench grip.The dimensions across the flats and the length of the flats for the type of fitting involved shall not be lessthan those specified in Table 2, Minimum wrench grip dimensions for flare connector nuts and table 3,Minimum wrench grip dimensions for fittings having pipe threads.

Table 2Minimumwrench grip dimensions for flare connector nuts

(See Clause 4.5.1.)

Nominal inside diameter oftubing, inch

Minimum length of flats inch(mm)

Minimum dimension acrossflats,

inches (mm)

3/8 3/8 (9.5) 3/4 (19.1)

1/2 1/2 (12.7) 7/8 (22.2)

5/8 5/8 (15.9) 1 (25.4)

3/4 3/4 (19.1) 1 1/4 (31.8)


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Table 3Minimumwrench grip dimensions for fittings having pipe threads

(See Clause 4.5.1.)

Minimum length of flats, inch,(mm)

Minimum dimension

Pipe thread size,inch

Male Female Male Female

1/8 3/16 (4.8) 3/16 (4.8) 7/16 (11.1) 9/16 (14.3)

1/4 1/4 (6.4) 1/4 (6.4) 9/16 (14.3) 11/16 (17.5)

3/8 5/16 (7.9) 5/16 (7.9) 11/16 (17.5) 3/4 (19.1)

1/2 3/8 (9.5) 3/8 (9.5) 7/8 (22.2) 15/16 (23.8)

3/4 13/32 (10.3) 13/32 (10.3) 1 1/16 (27.0) 1 1/8 (28.6)

1 17/32 (13.5) 17/32 (13.5) 1 3/8 (34.9) 1 1/2 (38.1)

4.5.2Surfaces of fittings which normally may come in contact with the hose shall have a smooth finish.

4.5.3Threads on pipe-end connections of fittings shall be taper pipe threads conforming to the Standard forPipe Threads, General Purpose (Inch), ASME B1.20.1, ; or the Standard for Dryseal Pipe Threads (Inch),ASME B1.20.3.

4.5.4Each end of a connector shall be equipped with a union fitting.

4.5.5A connector shall not incorporate a connector nut employing threads which are capable of beingassembled to standard taper pipe threads. The flare fitting dimensions shall comply with Table 4, Flarefitting dimensions and Figure 1, Flare figure dimensions.

Table 4Flare fitting dimensions

(See Clause 4.5.5.)

NominalconnectorID (in)

Threadsize Dim A Dim B Dim C Dim D Dim E

3/8 5/8-18 UNF 0.312 ±(0.010)

0.531 ±(0.010)

0.22 ±(0.010)

0.54 Min. 0.62 ±(0.010)

1/2 3/4-16 UNF 0.438 ±(0.010)

0.641 ±(0.010)

0.25 ±(0.010)

0.66 Min 0.75 ±(0.010)


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Figure 1Flare figure dimensions

(See Clause 4.5.5.)

Thread size

‘E’

‘D’

‘C’

‘A’ ‘B’

45°(0.79rad)

Including undercut

Min full thr’d

Note: Undercut op!onal on 3/4–16 UNF thread and on 15/16–16 UN thread.

Undercut is required on 5/8–18 UNF thread.

4.5.6The method of attaching end fittings to the conduit shall be such that the fittings cannot be removedwithout destroying the hose assembly.

4.5.7The method of attaching the connector to the house piping and the gas appliance shall not depend uponseparate ferrules, washers, gaskets or other detachable parts for gastightness, nor shall such separateparts be used to establish and maintain the method of seal provided with the connector end fittings.Quick-disconnect devices supplied as end fittings need not comply with this provision.

4.5.8Quick-disconnect devices used as end fittings on connectors shall comply with the applicableconstruction provisions of the Standard for Quick-Disconnect Devices for Use with Gas Fuel, ANSI Z21.41 •CSA 6.9.

4.6 InstructionsInstructions covering proper usage and installation shall be attached to each assembled applianceconnector. Instructions may be in a language(s) other than English when distributed in areas outside theUnited States and Canada.

4.6.1Intended Use.


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The Instructions shall include, as a minimum, statements to the effect that:a) the connector is intended only for use outdoors with portable appliances that may be moved for

convenience of operation.b) the connector is for use only on piping systems having fuel gas pressures not in excess of 1/2 psi

(3.45 kPa). See Clause 4.1-e.c) the connector must be of adequate length and capacity for the intended application.d) the connector is designed for movement after installation, but must not be kinked, twisted or

torqued. Periodic visual inspection should be made to determine that the connector is suitable forcontinued use.

e) contact with damaging foreign objects or substances must be avoided.

4.6.2Installation.

The instructions shall include, as a minimum, installation instructions to the effect that:a) CAUTION: All adapters (unions) supplied with the connector must be used unless the appliance valve

has a union connection. No attempt shall be made to connect the fittings on the connector directlyto the threaded rigid pipe ends of the equipment manifold or the outlet of the fuel gas pipingsystem.

b) the final assembly must be tested for leaks. CAUTION: Test for leaks only with leak test solution.Rinse with clear water after leak test to remove any corrosive residue. DO NOT USE OPEN FLAME TOTEST FOR GAS LEAKS.

The installation instructions shall be accompanied by illustrations or diagrams depicting the properassembly of fittings, adapters or other parts.

4.6.3The instructions need not necessarily be permanent in nature, but shall be sufficiently durable andattached in a manner that they may reasonably be expected to reach the person who will install theconnector. A self-adhering label wrapped around the connector so all instructions can be read will beacceptable. The information on the label shall be printed on an area having minimum dimensions of 2 by4 in (50.8 by 102 mm).

4.6.4These instructions shall be reviewed by the testing agency for accuracy and compatibility with the resultsof test from a technical standpoint and with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/orthe Natural Gas and Propane Installation Codes, CSA B149.1.

4.7 Marking

4.7.1Gas hose connectors shall bear a permanent marking on either a non-removable ring or a portion of anon-removable fitting not subject to tool usage, on which shall appear the following:a) manufacturer's name.b) symbol of the organization making tests for compliance with this standard.c) a number, not less than 3/32 in (2.4 mm) in height, identical to the last two numbers of the calendar

year in which the connectors are manufactured to identify the year of manufacture.d) a letter(s), not less than 3/32 in (2.4 mm) in height, identifying either the month or batch of

manufacture. The batch size shall be determined by the manufacturer.


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e) a marking to identify this standard, as follows: “ANSI Z21.54 • CSA 8.4.”

4.7.2Removable end fittings, other than quick-disconnect devices or union end pieces, of assembled gas hoseconnectors shall be stamped, etched or otherwise permanently marked with the connectormanufacturer's recognizable trade-mark or symbol. Quick-disconnect devices and 3 piece unions shallbear the marking of the device or union manufacturer(s).

4.7.3Gas hose connectors shall be marked at intervals not exceeding 2 ft (610 mm) on the body of the hose,“For Outdoor Use Only.”

5 Performance

5.1 GeneralDuring test for compliance with this Standard, connections shall be made using the maximum torquespecified in Table 5, Applied torque during reconnection of fittings test, unless otherwise specified.

Table 5Applied torque during reconnection of fittings test

(See Clauses 5.1 and 5.5.)

Torque, inch-pounds (N•m)

Nominal connector ID, inch Minimum Maximum

3/8 200 (22.60) 375 (42.37)

1/2 250 (28.25) 500 (56.49)

5/8 300 (33.90) 600 (67.79)

3/4 400 (45.19) 675 (76.26)

5.1.1Unless otherwise specified, all tests for leakage in Clause 5, Performance shall be made consistent withClause 5.2, Leakage.

5.2 LeakageA connector and its fittings shall not leak. For the purpose of this clause, leakage is defined as a flow ratein excess of 10cm3/hr at 3 psi (20.7 kPa).

Method of TestThis test shall be conducted at room temperature.

One end of the connector shall be attached to a flow measuring device, capable of accurately indicatingthe allowable flow rate, and a pneumatic system, capable of supplying clean air at a test pressure of 3 psi(20.7 kPa). An airtight connection shall be made at the opposite end of the connector.


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Air shall be admitted to the system slowly and maintained at the specified test pressure. The leakage rateshall be measured and shall not exceed 10 cm3/hr of air corrected to standard conditions of 30 in Hgcolumn (101.3 kPa) and 60°F (15.5°C).

5.3 CapacityThe capacity of the longest length of gas hose connector upon which the manufacturer requestsexamination shall not be less than 35,000 Btu per hour (10 257 W) using 0.64 specific gravity, 1,000 Btuper cubic foot (37.3 MJ/m3) gas pressure drop of 1.0 inch water column (249 Pa).

Method of TestFor this test, the appliance connector shall be arranged in a straight line. Standard weight pipe of propersize, reamed to remove burrs caused by cutting, shall be fitted to the inlet and outlet connections of theconnector. The straight run of pipe before and after the connector shall be of a length not less than 10pipe diameters (I.D.). Two short lengths of pipe or metal tubing shall be soldered to the pipe, one beforethe inlet and the other after the outlet connections. These pressure tappings shall be located 5 pipediameters (I.D.) from the inlet and outlet connections. A drill shall be inserted in the short length of pipeor metal tubing and a hole drilled through the wall of the large pipe, care being taken to remove anyburrs caused thereby. The two pressure tappings shall be connected to a differential pressure gage whichmay be read directly to at least 0.01 inch water column.

Either gas or air may be used for the test. If gas is used, it shall be vented or burned as far away from theconnector, test meter, and other test instruments as will preclude the heating of such equipment. Theflow rate shall be adjusted to give an indication on the gage approximately equal to the pressure dropspecified above and the necessary observations made and recorded. Observations may also be made at anumber of different pressure drops.

Capacity of the connector shall be resolved from these data according to the following formulae:

or, since

then

whereK = 5218 for U.S. customary units (345.543 for metric units);qsc = capacity with gas of 1,000 Btu per cu. ft. (37.3 MJ/m3) and 0.64 sp. gr. [saturated with water

at 60°F (15.5°C) and 30 in. mercury column (101.6 kPa)] at which a pressure drop of 1.0 inchequivalent water column (7.5 Pa) occurs, Btu per hr. (kW);

Q1 = quantity of test gas (or air) as metered, cu. ft. per hr. (m3/hr);sp gr1 = specific gravity of dry test gas (or air) referred to dry air as 1.0;sp grt = corrected or actual specific gravity of test gas (or air) as metered;Pt = absolute pressure of test gas (or air) as metered, in. mercury column (kPa);


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at = aqueous tension of water vapor in test gas (or air), in. mercury column (Pa);sp gr2 = 0.62 = specific gravity of water vapor referred to dry air as 1.0;pdt = observed pressure drop (corrected for difference in velocity head, if any, due to change of

area at points tappings are taken), in. water column (Pa); andθt = temperature of test gas (or air) as metered, °F absolute (K).

In the event the areas at the inlet and outlet tappings are different:

pdt = pdo + hv1 - hv2

where

The velocity head, in inches water column (Pascals), at the inlet tapping (hv1) or outlet tapping (hv2) isfound by the following formula:

and

C = 1.0335 x 10-5 for U.S. customary units (2.1923 x 10-10 for metric units);Q1 = quantity of gas (or air) as metered, cu. ft. per hr.;sp grt = corrected or actual specific gravity of test gas (or air), as metered;pdo = pressure drop (may be negative) between inlet and outlet pressure tappings on manifold as

observed, inches water column (kPa);D = inside diameter of pipe at inlet or outlet pressure tapping, inches (m); andP = absolute pressure of test gas (or air) at inlet or outlet pressure tapping, inches mercury

column (kPa).

5.4 Strength, flexibility and temperature resistance of conduit

5.4.1Unless otherwise stated, each test specified in this clause shall consist of three tests: one performed witha connector which has been maintained at -40°F (-40°C) for 6 hours immediately preceding the test, onewith a connector which has been maintained at 200°F (93.5°C) in dry air for six hours immediatelypreceding the test, and one with a connector which has been maintained at 200°F (93.5°C) in airsaturated with water vapor for 6 hours immediately preceding the test. During the conduct of thesetests, connectors which have been exposed to elevated temperatures shall not soften sufficiently tobecome sticky or for any material to ooze through the covering or inside the hose.

5.4.2Connectors shall withstand, without bursting or leakage, a hydrostatic pressure of 25 lb/in2 (172.4 kPa) asspecified in the following Method of Test.

Method of TestDuring this test, a quick-disconnect device supplied as an end connection shall be removed and replacedwith a plug.

A connector of the shortest length provided by the manufacturer shall be assembled in a hydraulicpressure test system, including a pump, gauge and heavy-duty pipe fittings, capable of sustaining thedesired pressure, care being taken to free all air from the system.


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The applied pressure shall be maintained for 1 minute. If no bursting or leakage occurs during thisperiod, this provision shall be deemed met. This test shall be applied to each nominal diameter, type andmaterial of connector submitted.

5.4.3Connectors shall be able to withstand, without leakage and without becoming detached, a steadylengthwise pull of 400 lb/in (70.1 kN/m) of nominal inside diameter for 1 minute as specified in thefollowing Method of Test.

Method of TestDuring this test, a quick-disconnect device supplied as an end connection shall be removed and replacedwith a plug.

One end of a connector of the shortest length provided by the manufacturer shall be securely attachedto a fixed pipe to which an air supply system and pressure gauge is connected. The other end shall besecurely attached in a similar manner to a closed pipe connected to a mechanical means by which aconstant pulling force of 400 lb/in (70.1 kN/m) of nominal inside diameter can be applied.

The required tension shall be applied to the connector and maintained for the duration of the test. Atthe end of 1 minute the connector shall not leak.

5.4.4The connector shall resist crushing to the extent that a 200 Ib (90.7 kg) load placed on a 1 in (25.4 mm)section of the center of the hose will not reduce the capacity more than 50 percent nor cause theconnector to leak when tested as specified in the following Method of Test.

Method of TestThe connector shall be immersed in water to a maximum depth of 2 in (50.8 mm), with its center restingon a hard flat surface. A 200 Ib (90.7 kg) weight with a smooth metallic face 1 in (25.4 mm) wide shall beplaced without impact on a 1 in (25.4 mm) section at the center of the hose. After one minute, theweight shall be removed, the connector subjected to 6 in of Hg column (20.3 kPa) air pressure. Thereshall be no sign of leakage.

A capacity test as specified in Clause 5.3, Capacity, shall then be conducted, and the resultant capacityshall not be less than 50 percent of that determined in Clause 5.3, Capacity.

5.4.5Gas hose connectors shall be able to withstand, without leakage or damage to the hose or fittings, 20applications of 90 degree (1.57 rad) twists in alternate directions.

Method of TestOne end of a connector of the shortest length provided by the manufacturer shall be securely attachedto a rigid frame and loaded in tension as specified in Table 6, Applied load during torsion test.

An air pressure equal to 3 psi (20.7 kPa) shall be maintained in the system while the hose is rotated 90degrees (1.57 rad) at the unattached fitting, in a plane perpendicular to the axis of the hose, and thenreturned to the original position and rotated 90 degrees (1.57 rad) in the opposite direction. Each 90degree (1.57 rad) twist and subsequent return to the original position shall be counted as one cycle, andthe twisting motion shall be applied uniformly at a rate of 5 cycles per minute. The connector shall notleak. This test shall be applied to each nominal diameter, type and material of connector submitted.


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Table 6Applied load during torsion test

(See clause 5.4.5.)

Nominal connector ID, inch Weight, pounds (kg)

3/8 18.75 (8.5)

1/2 25.00 (11.3)

5/8 31.25 (14.2)

3/4 37.50 (17.0)

5.4.6The connector shall make continuous contact with a cylindrical form 12 in (305 mm) in diameter for 110degrees (1.92 rad) of its circumference when the designated weight is suspended from each end of theconnector.

Method of TestThe connector shall be placed over a horizontal cylindrical form 12 in (305 mm) in diameter and a weightas determined from Table 7,Weights for flexibility test, attached to each end. The conduit shall be incontinuous contact with the cylindrical form for a distance of not less than 110 degrees (1.92 rad) aroundits circumference.

Table 7Weights for flexibility test

(See Clause 5.4.6.)

Nominal connector id, inch Weight, pounds (kg)

3/8 6 (2.7)

1/2 8 (3.6)

5/8 10 (4.5)

3/4 12 (5.4)

5.5 Reconnection of fittingsConnectors shall not leak as a result of being connected, disconnected and reconnected.

Method of TestConnectors employed for this test shall be new. Two samples of each nominal diameter, type andmaterial shall be supplied for test.

The connector to be tested shall be connected to a leak-proof system in such a manner that the pipethread end of the fitting is held rigid.

The union shall be tightened by the application of a torque not to exceed the minimum torque specifiedin Table 5, Applied torque during reconnection of fitting test. The connector shall then be leak tested asdescribed in Clause 5.2, Leakage. If the connector leaks, the torque shall be increased sufficiently to


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overcome the leakage, but not in excess of the maximum torque specified in Table 5. There shall be noleakage in excess of that specified in Clause 5.2 after the union is tightened as specified in this paragraph.

A split section of rigid pipe, clamped together to obtain a snug fit over the connector, with edgesrounded at the ends, shall then be snugly fitted over the tubing with its nearest edge a distance from thetop of the fitting equal to the internal diameter of the tubing. This pipe shall be used as a handle todeflect the tubing at the fitting 60 degrees (1.05 rad) in one direction from the center line of the fitting.The tubing shall then be returned to its original position, deflected 60 degrees (1.05 rad) in the oppositedirection, and again returned to its original position. The test for leakage shall again be applied asoutlined above. There shall be no leakage in excess of that specified in clause 5.2, Leakage.

The union shall then be disconnected, the tubing rotated 55 degrees (0.96 rad) in a clockwise direction,and the union again assembled to the fitting and tightened by the application of a torque not to exceedthe torque determined to be necessary to overcome leakage in the previous connection. Leakage testsshall again be applied as outlined above. If no leakage occurs, or if leakage is observed and can beovercome by an increase in torque not to exceed the maximum torque specified in Table 5, the tubingshall be deflected as described in the preceding paragraph after which leakage tests shall again beapplied as outlined above.

The procedure outlined in the preceding paragraph shall be performed a total of 8 times without leakagein excess of that specified in Clause 5.2, Leakage.

5.6 Strength of fittings

5.6.1Connectors shall not leak, break or be otherwise adversely affected by application of a tightening torqueof 1,040 inch-pounds per inch (4.6 kN-m/m) of nominal hose diameter.

Method of TestFor this test one sample of each nominal diameter of assembled gas hose connector shall be employed.

The pipe thread end of one end of the connector shall be rigidly connected to a leak-proof system. Theother end of the connector shall be sealed so that no leakage will occur at this point under an airpressure of 6 inches mercury column (20.3 kPa). The fitting assembly shall then be tightened by theapplication of a torque of 1,040 inch-pounds per inch (4.6 kN-m/m) of nominal tubing diameter. If nobreakage occurs, air shall be admitted to the system under a pressure equivalent to that of a 6 inchesmercury column (20.3 kPa), and with the fitting end completely immersed in water no leakage shall beevident.

5.6.2Fittings shall be capable of withstanding the impacts specified in Table 8, Impact applied during conductof clause 5.6.2 without leakage, cracking or breakage. This test shall not be applied to quick-disconnectdevices which comply with the Standard for Quick-Disconnect Devices For Use With Gas Fuel, ANSI Z21.41CSA 6.9, supplied as end fittings on connectors.

Method of TestThe fitting on one end of a connector shall be tightened to a torque of 1,040 inch-pounds per inch (4.6kN-m/m) of tubing diameter, secured to a pipe nipple or fitting mounted on a rigid surface so that thefree length of the supporting member is not greater than 2 in (50.8 mm), and struck at a 90 degree (1.57rad) angle to the gas-way with an impact as specified in Table 8. The testing device shall be arranged so


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that the center line of contact between the striking weight and a wrench flat of the nut will be at thelongitudinal center of the flat.

After this impact, the fitting shall be checked for leakage under an air pressure equivalent to 6 in mercurycolumn (20.3 kPa) and examined visually for cracks or breaks.

Table 8Impact applied during conduct of Clause 5.6.2

(See Clause 5.6.2.)

Nominal hose size, inch Impact, foot-pound (Nm)

3/8 10 (13.56)

1/2 10 (13.56)

5/8 15 (20.34)

3/4 15 (20.34)

5.7 Season crackingThree specimens of pressure confining brass devices shall not show cracks or flaws when tested inaccordance with the Standard Test Method for Ammonia Vapor Test for Determining Susceptibility toStress Corrosion Cracking in Copper Alloys, ASTM B858-06 (2012), using a pH value of 9.8 - 10.0. This testshall be conducted on unplated samples.

6 Manufacturing and production testsThe manufacturer shall submit to the certifying agency a plan which is mutually acceptable to themanufacturer and the certifying agency and which describes the programs and test procedures specifiedin Clauses 6.1, 6.2 and 6.3 and the records to be kept by the manufacturer.

6.1The manufacturer shall use a program to qualify raw materials, parts, assemblies and purchasedcomponents.

6.2The manufacturer shall test each hose for leakage.

6.3The manufacturer shall use a program which includes a mutually acceptable schedule(s) to conduct:a) strength tests;b) flexibility tests;c) temperature resistance tests;d) reconnection of fittings tests;e) season cracking of end fittings tests; andf) impact tests on fittings with both external and internal threads.


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6.4The manufacturer's test method(s) shall be capable of relating back to the test(s) specified in thestandard.


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Annex A(normative)Items unique to one country (Canada)Note: Exhibit A does not apply to ANSI Z21.54

A.1All instructions and marking provisions specified in this standard are required to be in a form easilyunderstood in both English and French.

4.7 Marking

4.7.1-e “ANSI Z21.54 · CSA 8.4.” (No French translation required by thisstandard.)

4.7.3 “For Outdoor Use Only.” «Pour installation à l'extérieur seulement»

A.2Units of measurement required on printed instructions and markings shall include the SI (metric) valuesas a minimum. SI (metric) values are the units of measure in Canada and shall be provided on printedinstructions and makings as a minimum.


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Annex B (informative)Table of conversion factorsNote: This annex is informative and is not part of the standard.

Table BTable of conversion factors

QuantityU. S. unit Multiplying factor SI units*

Name Symbol U.S. to SI SI to U.S. Symbol Name

TORQUE ounce-force-inchpound-force-inchpound-force-foot

ozf-inlbf-inlbf-ft

7.061 × 10-31.129 × 10-1

1.355

141.628.85

7.38 × 10-1

N•mN•mN•m

newton-meternewton-meternewton-meter

LENGTH inchinchfoot

ininft

2.540 × 10-22.540 × 103.048 × 10-1

39.3739.37 × 10-3

3.281

mmmm

metermillimetermeter

AREA square inchsquare inchsquare foot

in2in2ft2

6.452 × 10-46.452 × 1029.290 × 10-2

15501550 × 10-6

10.76

m2

mm2

m2

square metersquare millimetersquare meter

VOLUME cubic inchcubic footcubic footgallongallon

in3ft3ft3galgal

1.639 × 10-52.832 × 10-22.832 × 103.785 × 10-3

3.785

61.02 × 10335.31

35.31 × 10-3264.1

264.1 × 10-3

m3

m3

lm3

l

cubic metercubic meter

litercubic meter

liter

VELOCITY foot/secondfoot/minutemile/hourmile/hour

ft/sft/minm/hrm/hr

3.048 × 10-15.080 × 10-34.470 × 10-1

1.609

3.281196.82.236

6.214 × 10-1

m/sm/sm/sk/hr

meter/secondmeter/secondmeter/secondkilometer/hour

ACCELERATION foot/second2 ft/s2 3.048 × 10-1 3.281 m/s2 meter/second2

FREQUENCY cycle/second c/s 1 1 Hz hertz

MASS ounceouncepoundgrain

ozozlbgr

2.835 × 10-22.835 × 104.536 × 10-16.480 × 10-5

35.2735.27 × 10-3

2.20415.43 × 10-3

kggkgkg

kilogramgram

kilogramkilogram

MASS PERUNIT AREA

pound/foot2 lb/ft2 4.882 2.048 × 10-1 kg/m2 kilogram/meter2

MASS PERUNIT VOLUME

pound/foot3 lb/ft3 1.602 × 10 6.243 × 10-2 kg/m3 kilogram/meter3

SPECIFIC VOLUME foot3/pound ft3/lb 6.243 × 10-2 1.602 × 10 m3/kg meter3/kilogram

MASS FLOW RATEpound/hour

pound/foot2hourpound/inch2hour

lb/hrlb/ft2hrlb/in2hr

1.260 × 10-41.356 × 10-31.953 × 10-1

7.936 × 1037.374 × 102

5.120

kg/skg/m2skg/m2s

kilogram/secondkilogram/

meter2secondkilogram/

meter2second

VOLUMEFLOW RATE

foot3/secondfoot3/secondfoot3/minutefoot3/minutegallon/minutegallon/minutegallon/hourgallon/hour

ft3/sft3/s

ft3/min.ft3/min.gal/min.gal/min.gal/hrgal/hr

2.832 × 10-22.832 × 104.719 × 10-44.719 × 10-16.309 × 10-56.309 × 10-21.052 × 10-61.052 × 10-3

35.3135.31 × 10-32.119 × 10-32.119 × 101.585 × 1041.585 × 109.505 × 1059.505 × 102

m3/sl/sm3/sl/sm3/sl/sm3/sl/s

meter3/secondliter/second




(Continued)


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Table B (Concluded)

QuantityU. S. unit Multiplying factor SI units*

Name Symbol U.S. to SI SI to U.S. Symbol Name

PRESSURE pound force/inch2pound force/foot2

atmosphere

pounds/squareinch‡

pounds/square inchinch water column

lbf/in2lbf/ft2

inch H2O (4°C)inch Hg (0°C)atm (std)

psi

psiiwc

6.895 × 1034.788 × 102.491 × 1023.386 × 1031.013 × 1052.768 × 106.895 × 10

2.491

1.450 × 10-42.088 × 10-24.014 × 10-32.953 × 10-49.871 × 10-63.613 × 10-21.450 × 10-24.015 × 10-1

PaPaPaPaPaiwcmbmb

pascalpascalpascalpascalpascal

inch water columnmillibarmillibar

ENERGY, WORK,QUANTITY OF

HEAT

horsepower hourhorsepower hourkilowatt hourkilowatt hour

BtuBtuhphrhphrkwhrkwhr

1.055 × 1031.055

2.685 × 1062.685

3.6 × 1063.6

9.478 × 10-49.478 × 10-13.724 × 10-73.724 × 10-12.777 × 10-72.777 × 10-1

JkJJMJJMJ

joulekilojoulejoule

megajoulejoule

megajoule

POWER, HEATFLOW RATE

Btu/hrBtu/hrhphp

ton refrigeration (12,000 Btu/hr)ton refrigeration (12,000 Btu/hr)

Btu/hour Btu/hrBtu/hourfoot2 Btu/hrft2

2.931 × 10-12.931 × 10-47.457 × 1027.457 × 10-13.516 × 103

3.5162.929 × 10-4

3.155

3.4123.412 × 1031.341 × 10-3

1.3412.844 × 10-42.844 × 10-13.414 × 1033.1695 × 10-1

WkWWkWWkWkW

W/m2

wattkilowattwatt

kilowattwatt

kilowattkilowatt

watt/meter2

HEAT CAPACITYSPECIFIC

HEAT CAPACITY

Btu/degree FBtu/

pounddegree FBtu/

pounddegree F

Btu/°FBtu/lb°F

Btu/lb°F

1.899 × 1034.187 × 103

4.187

5.265 × 10-42.388 × 10-22.388 × 10-5

J/°C

J/kg•°C

kJ/kg•°C

joule/degreeCelsius

joule/kg•degreeCelsius

kilojoule/kg•degreeCelsius

LATENT HEAT Btu/poundBtu/pound

Btu/lbBtu/lb

2.326 × 1032.326

4.299 × 10-44.299 × 10-1

J/kgkJ/kg

joule/kilogramkilojoule/kilogram

VOLUME ATSTD.

CONDITIONS†

ft3 (60°F, 30 inches Hg, sat)“ ” ”“ ” ”“ ” ”“ ” ”

.9826.02784.02832.02639.02655

1.017735.9235.3137.8937.66

ft3 (60°F, 30 inches Hg, dry)m3 (15°C, 760 mm Hg, dry)m3 (15°C, 760 mm Hg, sat)m3 (0°C, 760 mm Hg, dry)m3 (0°C, 760 mm Hg, sat)

HEATING VALUE Btu/cubic foot Btu/ft3 3.752 × 10-2 2.684 × 10 MJ/m3 megajoule/meter3

* SI Units (International System of Units) have been adopted by the International Gas Union for use within the gas industry. Where the samequantities have been defined by ISO (International Standards Organization, they are identical to the SI Units.† Standard cubic foot (SCF) measured@ 60°F and 30 inches Hg, Saturated. (U.S. Conditions) Standard cubic meter (ms3) measured@ 15°C and760 mm Hg, dry. (SI Conditions)Normal cubic meter (mn3) measured@ 0°C and 760 mm Hg, dry.‡ U.S. unit to U.S. unit.


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Temperature scales and conversionsThe unit of temperature in the International System of Units (SI) is the kelvin (K), but it is generallyaccepted practice to express temperature differences in terms of degrees Celsius (°C) because the degreeintervals are identical. The term “centigrade” was abandoned in 1948 by the General Conference onWeights and Measures but in fact is still in common use. The accepted abbreviation for centigrade is also°C and for all practical purposes the degree intervals of centigrade, Celsius and kelvin, are identical.

Many temperature measurements are still made in terms of degrees Fahrenheit (°F). Although a formaldefinition of the Fahrenheit scale does not exist, it is based on:a) The freezing (ice) point of water = 32°Fb) The boiling point of water under standard pressure conditions = 212°Fc) The formula for absolute temperature, 5/9 (°F-32) = °Cd) The formula for “temperature rise,” 5/9 °F = °C

°C °F °C °F °C °F–40 –40.0 25 77.0 70 158.0–20 –4.0 30 86.0 80 176.00 32.0 35 95.0 90 194.010 50.0 40 104.0 100 212.015 59.0 50 122.0 110 230.020 68.0 60 140.0 120 248.0

Multiples and submultiples of basic units

Factor by which the unit ismultiplied Prefix Symbol

1 000 000 000 000 = 1012 tera T1 000 000 000 = 109 giga G

1 000 000 = 106 mega M1 000 = 103 kilo k100 = 102 hecto h10 = 101 deka da0.1 = 10–1 deci d

0.01 = 10–2 centi c

0.001 = 10–3 milli m

0.000 001 = 10–6 micro µ

0.000 000 001 = 10–9 nano n

0.000 000 000 001 = 10–12 pico p


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Documents

ANSI Z21.54__2014