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SOUTHERN COMPANY SERVICES M-2-3

ENGINEERING STANDARDS AND GUIDELINES

MECHANICAL PIPE HANGERS AND SUPPORTS

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Pipe Hangers and Supports

Index

1.0 INTRODUCTION

1.1. Purpose1.2. Scope

2.0 DEFINITIONS

3.0 CODES AND STANDARDS

4.0 DESIGN CRITERIA AND GUIDELINES

4.1. Component Designation4.2. Loads4.3. Pipe Stress4.4. Welds4.5. Support Spacing4.6. The Pipe Support Contractor and Support Details4.7. Pipe Support Callout4.8. Specialty Supports4.9. Support Placement Tolerance

5.0 PIPE SUPPORT TYPES AND COMPONENTS RIGID SUPPORTS

5.1. Rod Hangers and Components5.1.1 Beam Attachments5.1.2 Hanger Rods5.1.3 Turnbuckles5.1.4 Clamps5.1.5 Welds5.1.6 Trapeze Hangers

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5.1.7 Riser Clamps5.1.8 Washer Plates

5.2. Pipe Shoe and Stanchion Supports5.3. Guides5.4. Limit Stops5.5. Anchors5.6. Welded Pipe Attachments

6.0 PIPE SUPPORT TYPES AND COMPONENTS ENGINEERED SUPPORTS

6.1. Variable Spring Hangers6.2. Constant Supports6.3. Design of Supplemental Steel

7.0 REFERENCES

Appendices

Appendix A Standard Support DetailsAppendix B Supplemental SteelAppendix C FRP Standard Support DetailsAppendix D HDPE Standard Support DetailsAppendix E Pipe Support Guidelines; FRP & HDPE Pipe

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REVISION PAGE

1.0 REVISION 1

1.1 Index:

Added sub section 4.9 in section 4.0

Added Appendix C: FRP Standard Support DetailsAdded Appendix D: HDPE Standard Support DetailsAdded Appendix E: Pipe Support Guidelines; FRP and HDPE Pipein section 7.0

1.2 Appendix A:

Added Rigid Base Support details RBS-10 through RBS-16 in section 2.0Added Rod Hanger detail RHS-5 in section 3.0Added Guide Base Support details GBS-12, GBS-13 and GBS-14 in section 4.0Added Anchor Base Support details ABS-7, ABS-8 and ABS-9 in section 6.0

1.3 Appendix B:

Added detail 1D in section 2.0Added detail 5G in section 6.0Added details 7F, 7G, 7H, 7J, 7K and 7L in section 8.0Added details 8H and 8J in section 9.0Added detail 11B in section 12.0Added detail 12B in section 13.0

1.4 Added Appendix C: FRP Standard Support Details

1.5 Added Appendix D: HDPE Standard Support Details

1.6 Added Appendix E: Pipe Support Guidelines; FRP & HDPE Pipe

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PIPE HANGERS AND SUPPORTS

1.0 INTRODUCTION

1.1 Purpose

This document provides a guideline for the design of pipe supports. The document is notintended to supersede project specific design criteria but to reflect current SCS practices.

1.2 Scope

This standard shall apply to pipe supports for piping systems ranging in size up to 24inches, unless noted otherwise.

For the purposes of this standard, pipe supports have been divided into two maincategories:

Rigid Pipe Supports Application where rigid pipe hangers are acceptable.

Design Engineering shall be responsible for the location and selection of rigid pipehangers. Generally, after the engineer has identified the type and location of rigidsupports, the detailer shall use the guidelines in section 5.0, Pipe Support Types andComponents Rigid Supports, to provide detailed support design.

Engineered Supports Application where support flexibility must be designed intothe piping system by providing variable springs, constant supports and/or rigidhangers, or the support design is critical to the system.

Design Engineering shall be responsible for the design of engineered pipe hangersand supports. Design criteria and guidelines are given in section 6.0 of this standard.Engineered supports shall be specified after a thorough pipe stress analysis has beenperformed, unless noted otherwise. See Mechanical Standard M-2-2, Piping StressAnalysis.

NOTEPiping systems containing engineered supports shall be designed as an engineeredsystem of supports. Therefore, the engineer and detailer shall refer to section 5.0,Pipe Support Types and Components Rigid Supports, of this standard, whenrigid type supports are required as part of the engineered pipe support system.

2.0 DEFINITIONS

The following definitions are applicable to new generation, environmental, and retrofitprojects.

2.1 Piping System Category Indicates the piping systems criticalness of service as definedin Pipe Class Criteria found in appendix A of Piping Design Standard M-2-1. In general,there are the following three categories:

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2.1.1 Category 1/Critical Systems -These systems include main steam, hot and cold reheat,boiler feed-water pump suction, and discharge. The failure of any of these systems willresult in the loss of generation capability and/or substantially impact the safety of plantpersonnel.

2.1.2 Category 2/Intermediate Systems -These systems include extraction steam, high pressureheater drains, or condensate systems. Failure of any of these systems has less impact onthe loss of generation capability or personnel safety.

2.1.3 Category 3/Non-critical Systems - All other systems such as floor drains, cold watersystems, potable water, plant service water, vents, or circulating water. Failure of any ofthese systems has no impact on generation capability.

2.2 Design Load - This is the pipe load used in the design of the pipe support. It is the higherof the load cases for the piping system.

2.3 Operating Load - This is the pipe load that acts on the support when the system is inservice. This load is the algebraic sum of weight load and thermal load. Operating loadis equal to hot load for spring hangers.

2.4 Hydrostatic Load - This is the pipe load acting on the support during hydrostatic testingof the piping system. Hydrostatic loads are often much higher than design loads forsteam and gas piping systems.

2.5 Sustained Load - This is the sum of the weight of the pipe, contents, and pipe supportattachment components plus the pressure acting on the system.

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2.6 Minimum Load - The support shall be designed for the minimum load if the design loadis less than the minimum load. The table below (reprinted from MSS SP-58 PipeHangers and Supports Materials and Fitting Industry) suggests the minimum designloads based upon the pipe size. This minimum load should be used in designing

supplemental steel.

MINIMUM DESIGN LOADS(From MSS SP-58 Pipe Hangers and Supports Materials and Fit ting Industr y)

Nominal Pipe Size (in) Load (lb)

3/8 150

150

150

1 150

1 150

1 150

2 150

2 150

3 200

3 210

4 250

5 360

6 480

8 760

10 1120

12 1480

14 1710

16 2130

18 2580

20 3060

24 3060

2.7 Thermal Load - Stresses imposed on the piping system due to expansion or contraction(or both) of the components due to a wide range of temperatures.

3.0 CODES AND STANDARDS

Pipe support design is governed by the codes and standards that apply to the pipingsystem. The piping codes used in new generation, environmental, and retrofit projectshave provisions for the design of pipe supports. The designer should be familiar with thesupport design portions of the applicable codes listed in section 7.0 References.

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4.0 DESIGN CRITERIA AND GUIDELINES

4.1 Component Designation

For the purpose of design standardization all support component designations shall bebased on the Anvil International, Inc. Pipe Hangers Catalog numbering system.

4.2 Loads

Supports shall be designed for the most severe conditions of coincident pressure, weight,temperature, and any fluid dynamic events. In addition, piping exposed to wind load,snow, ice, earthquake, or other natural phenomena shall be designed for such loading.

4.3 Pipe Stress

Critical piping systems, Piping Category 1, 2, or otherwise designated due to pipingloads, shall be stress analyzed in accordance with Mechanical Standard M-2-2, PipingStress Analysis. The pipe support engineer and designer shall base pipe support selectionand design on results from the pipe stress analysis.

4.4 Welds

Welding or bolting attachments to the building or pipe rack structural steel shall be donein accordance with the latest edition of the AISC Manual of Steel Construction Allowable Stress Design.

Maximum allowable shear stress in welds shall be limited to 80 percent of the maximumallowable stress of the weaker of the base metals being joined. Maximum allowabletension and bending stresses in welds shall be limited to the maximum allowable stress of

the weaker of the base metals being joined.4.5 Support Spacing

Horizontal piping shall be supported such that excessive sag, bending, or shear stress isminimized. Special consideration will be given where components such as flanges andvalves impose concentrated loads.

Vertical piping shall be supported with riser clamps. See section 5.1.7 Riser Clamps forspacing of vertical restraints.

Supports for piping 3 inches or larger shall be designed and detailed individually.Supports for piping 2 1/2 inches and smaller shall be designated as field-designed and

located (except for Category 1 and 2 systems), unless noted otherwise. Field-designedpipe supports shall consider all critical movement, load, and operational conditions.Design criteria and guidelines for rigid-type pipe hangers given in section 5.0 PipeSupport Types and Components Rigid Supports shall be followed.

Where stress analysis calculations are not performed, pipe support spacing for standardand heavier weight pipe shall be in accordance with table 121.5 of ASME B31.1 code.Suggested pipe support spacing chart is reprinted in table 4.5. This chart shall not beused where components, such as flanges and valves, impose concentrated loads.

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Table 4.5SUGGESTED PIPE SUPPORT SPACING

Suggested Maximum Span (carbon steel pipe only)Nominal Pipe Size (NPS) Water Service (ft) Steam, Gas, or Air Service (ft)

1 7 9

2 10 13

3 12 15

4 14 17

6 17 21

8 19 24

12 23 30

16 27 35

20 30 3924 32 42

NOTES:1. The above data is based on ANSI B31.1 Power Piping Code.2. The maximum spacing for pipe supports, shown above, applies only for horizontal straight runs of standard

weight and heavier pipe when the operating temperature does not exceed 750 F.3. The above table does not apply where span calculations are made or where there are concentrated loads

between supports such as flanges, valves, and specialties.4. The spacing shown above is based on a maximum combined bending and shear stress of 2800 psi and

insulated pipe filled with water or the equivalent weight of pipe or steam, gas or air service. The pitch of theline is such that sag of 0.1 inch between supports is permissible.

4.6 The Pipe Support Contractor and Support Details

Manufacturers Standardization Society specification MSS SP-77 Guidelines for PipeSupport Contractual Relationships shall be used as the basis for establishingresponsibilities for pipe support details. Contractual relationships shall be arranged totrack the following in order of governing precedence:

1. Project specific contract documents2. This standard M-2-3 Pipe Hangers and Supports3. MSS SP-77 Guidelines for Pipe Support Contractual Relationships

Pipe support details shall be developed with information provided by Design Engineeringdrawings and stress analysis results, if applicable. Pipe support details shall be developedby an SCS-approved pipe support contractor. The contractor shall be responsible for pipesupport details, development of the bill of materials, fabrication, and delivery of pipesupport assemblies. As dictated by the project and where job requirements permit,Design Engineering may develop pipe support details, or typical details may be used inlieu of individual drawings.

The following information is required by the pipe support contractor and provided byDesign Engineering:

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Location of pipe support assembly with respect to the piping system along with thesupport type and supplementary steel type, if required, shall be shown on the pipingisometric and/or orthographic drawings. Support load required for the contractor tosize supplementary steel. In some instances, support steel size may be shown in lieu

of load. Detailed structural steel and concrete drawings. For spring hangers, hot and cold loads, hot and cold positions, and hydro load shall be

noted. For constant supports, design load, calculated travel (up or down), and total travel

shall be noted.

The pipe support contractor shall provide the following:

Complete pipe support assembly drawings including details of supplemental steel,when applicable. When loads are submitted in lieu of steel size, the contractor isresponsible for sizing the appropriate steel. Consideration must be given toappropriate bearing surface as well as load capacity. Design, fabrication and erectionof structural steel shall be in accordance with the AISC manual of steel construction,latest edition.

Complete bill of materials. Weld sizes. Special field welding procedures shall be noted when required. Supply of pipe support assemblies.

All documents provided by the pipe support contractor shall contain the plant, unit, linenumber, and pipe support callout matching the purchasers documents. The pipe supportcontractors design documents are subject to review and approval by Design Engineeringprior to release for fabrication.

Existing support steel shall be utilized, when possible. Complex supplemental steel

arrangements should be avoided if possible.4.7 Pipe Support Callout

Pipe supports shall be tagged on the piping isometric and/or orthographic drawings. Eachpipe support shall have an identification number, Sx, where x identifies the bill ofmaterials item number. Each pipe support shall have a pipe support detail callout whichshall contain the support type (Appendix A), a unique identifier, and supplemental steeltype (Appendix B). A short description shall be included in the bill of materials alongwith the calculated load, if applicable. The pipe support identifier shall be unique for aparticular line number.

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Both tags shall have a box surrounding the number.

Example:S9

GBS-5-01/1A

S9 - bill of materials item numberGBS-5 - pipe support type01 - unique pipe support identifier1A - supplemental steel type

When specifying that existing structural steel will be used and supplemental steel will notbe necessary, no designation will follow the pipe support unique identifier (for exampleGBS-5-01).

4.8 Special Supports

When necessary, project-specific supports shall be noted in the following manner:

S10SP-02/1A

S10 - bill of materials item numberSP - support type (SP denotes special or project-specific)02 - unique pipe support identifier1A - supplemental steel type

4.9

Support Placement ToleranceSupport installation location shall be within 1-0 from that designated on the pipesupport drawing, piping isometric, or orthographic.

5.0 PIPE SUPPORT TYPES AND COMPONENTS RIGID SUPPORTS

5.1 Rod Hangers and Components

The rod hanger is the most common type of hanger in a piping system. The rod hanger isa rigid, one-way vertical restraint consisting of a rod attached to a pipe clamp at one endand to the building or pipe rack structure at the other end, usually via a beam attachment.

Rod hangers should not swing more than 4 degrees from the vertical position. Wherenecessary, offset of pipe attachments and building/rack attachments shall be used tomaintain the 4-degree angular swing and to maintain concentric loading of the hangerwhen the piping is at operating conditions.

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5.1.1 Beam Attachments

Welded beam attachments with a pin or bolt shall be used where possible. This type ofattachment can accommodate a welded eye rod or weld-less eye nut and allows up to a 4-

degree swing of the rod in the direction parallel to the pin.

Mechanical beam attachments or beam clamps shall be used for ambient systems(temperature

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For rod take-out calculations (specifying length of rods to be purchased), a 3-inch gapbetween rod tips within the turnbuckle shall be used for a standard 6-inch turnbuckle.The turnbuckle is typically located about 3 feet from the pipe for ease of adjustment. Aright-hand threaded hex nut with lock nut shall be used for jamming the turnbuckle to

prevent it from disengaging.

5.1.4 Clamps

Two-bolt pipe clamps shall be used to support cold pipelines with little or no insulation.Three-bolt clamps shall be used for all other systems. For high temperature pipingsystems (temperature >750 F), alloy clamps shall be used. Otherwise, carbon steelclamps are adequate. Jamb nuts (or suitable locking devices) shall be specified for clampbolts.

5.1.5 Welds

Beam attachments should be welded to building, pipe rack, or supplemental steel withfillet welds along two edges of the attachment. Unless pipe movement otherwisedictates, orient the attachment so that the axis of the pin or bolt is parallel to the axis ofthe beam. The weld should run along the beam flange. Welding shall be on the straightsides of the attachment, not on the rounded sides. Welds shall be designed to develop thefull strength of the pipe support component being joined.

5.1.6 Trapeze Hangers

Trapeze hangers shall be used to avoid interferences, especially where a piping system isrouted below another piping system. Pipe may be off center of the trapeze. Wherepiping is off-center, spring hanger spring loads must be re-calculated. Pipe must beattached to a trapeze by an anchoring device such as a U-bolt. When required, insulation

protection devices shall be used with trapeze hangers when the pipe is insulated.Rods used in trapeze hanger assemblies shall be designed to carry a minimum of 75percent of the calculated total operating load.

5.1.7 Riser Clamps

Riser clamps shall used to support vertical piping. Friction shall not be relied upon tohold the riser clamp in place. A minimum of three shear lugs shall be provided andwelded to the pipe along the two vertical sides and the top with sufficient weld materialto support the total pipe load. Shear lugs shall be manufactured of the same material asthe pipe.

Typically, a pipe support vendor has three types of riser clamps:

Simple strap with four bolts. Heavy duty type. Welded, reinforced bars (to take torsion out of the clamp and increase the capacity).

When designing supports with riser clamps, consideration shall be given to the load pincenter-to-center dimensions. The center-to-center span should be kept as close to thepipe as possible to reduce the bending effect on the clamp.

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Each rod of a riser support shall be sized for the full load of the support. Thisrequirement does not apply to spring or constant supports where the rod size isdetermined by the spring housing itself.

Where vertical restraints are required on piping systems (such as main steam, hot reheat,cold reheat, extraction to deaerator, and boiler feed pump suction piping), each supportrod must be capable of supporting 60 percent of the total hydrostatic load of the riser andadjacent piping or 75 percent of the calculated operating load - whichever is greater. Thisrequirement is necessary although other hangers may be designed to support the riser.Generally, the support spacing shall be limited to 1.5 times the recommended horizontalspans, and the vertical restraint must be located above the center of gravity of the riser.The vertical restraint shall be located in the upper third of the pipe.

Alloy risers and pipe clamps shall use bolting material manufactured from ASTM A-193,B-7 studs, and A-194 grade 2H heavy hex nuts, unless required otherwise.

5.1.8 Washer Plates

When pairs of channels are used as supplemental steel, a washer plate shall be welded toboth the top and bottom flanges of the channels to prevent rotation of the channel. Thewasher plate shall be selected to match the rod size. The hole in the washer plate shouldbe 1/8 inch larger in diameter than the rod, unless required otherwise. The hanger rodextends through the channels and shall be attached using two hex nuts.

5.2 Shoe and Stanchion Supports

Shoe and stanchion supports are rigid, one-way vertical restraints. Piping withoutinsulation shall be supported from below by resting it on a steel member or by welding a

pipe stanchion and a plate. Piping with insulation shall be supported from below bywelding a shoe, a pipe covering protection saddle, or a pipe stanchion and a plate.

Welded attachments to pipe shall be designed for the vertical force to be supported at thegiven support location. A pipe shoe, pipe covering protection saddle, or pipe stanchionand a plate shall be supported on a sliding surface of a steel member or a steel plateanchored on a concrete member.

5.3 Guides

Guides are two-way piping system restraints. In horizontal piping, the pipe shall besupported vertically and restrained in lateral direction. In vertical risers, the pipe shall berestrained in the lateral direction only.

Two common types of guides are the box type and sway strut type.

The box-type guide, built up by using structural steel members, shall be used for low-temperature piping systems, unless required otherwise. Box-type guides should not beused for high-temperature systems because of pipe contact with structural members.Such contact results in friction caused by axial movement of the pipe and heating of thestructural member. High-temperature systems also have significant insulation whichrequires additional components such as insulation shoes or lugs.

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Two perpendicular sway struts can provide the same movement control as a box guide.This type of arrangement has advantages over the box type:

Simpler to design and install. Flexible in orientation. Require less space. Provide more pipe axial movement without friction load. Allow field adjustment.

Sway strut guides require standard support components that need considerable lead timefrom order to delivery. The use of sway struts may not be economical for supportinglight loads or small-bore pipe, especially cold pipe.

The following cautions apply to the design of guides using sway strut assemblies:

When a sway strut is used in the vertical direction, the piping shall be supported fromabove rather than from below.

The pin-to-pin dimension for allowable load shall be verified. The longer a strut, thelower its buckling load.

The angle between the two struts should be no less than 45 degrees and no more than135 degrees. Where this condition cannot be satisfied, the piping model and stressanalysis shall be modified accordingly.

5.4 Limit Stops

Limit stops are two-way restraints in a piping system. In horizontal piping, the pipe shallbe supported vertically and restrained in order to control axial movements. Limit stopsare most often found in high temperature and insulated piping systems.

Limit stops shall be built by welding two plates or shoes axially to a pipe, 180 degreesapart. Axial pipe movement is restrained by attaching a steel member across the plate orthe shoe.

The limit stop plate or shoe and steel members shall be designed to resist the limit stoprestraint loads determined by a stress analysis load report.

5.5 Anchors

Anchors shall be designed to restrain the movement of pipe in all directions. Anchors arebuilt by welding plates, shoes, or stanchions around pipe. Such an anchor assembly shallbe welded or bolted to the building or pipe rack structure. The weld and the size of the

plates, shoes, or stanchions welded to the pipe shall be designed for the anchor designloads determined by a stress analysis load report.

As necessary, anchor, guide, and limit stop restraint loads shall be reviewed by the civilor structural design group before issuing the final design.

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5.6 Welded Pipe Attachments

Welded pipe attachments include shear lugs, stanchions, insulation lugs, and otherassemblies which transfer the load from the pipe to the support. Welded attachment lugs

impose local stress on the pipe wall which must be considered.

The design of shear lugs on a pipe risers vertical restraints shall be such that only half ofthe number of lugs shall be required to carry the total load of the support. For example, ifthe total load is 4,000 lb and the support has 4 lugs, each lug shall be designed to carry aload of 2,000 lb. This provision anticipates that fabrication tolerance, erection, pipemovements, or other factors prevent the contact of all the lugs onto the clamp orsupporting structure.

For pipe larger than 6 inches NPS, at least four lugs shall be used for axial support ineach direction. Lugs shall be welded on two sides and on the top.

Lug material shall be the same as the piping material.

Stanchions may be welded to the pipe. Welds between the stanchion and the pipe shouldbe partial penetration welds with a fillet cap. The weld shall be treated as a piping weld.

6.0 PIPE SUPPORT TYPES AND COMPONENTS ENGINEERED SUPPORTS

6.1 Variable Spring Hangers

Spring hangers, or variable supports, allow pipe to move vertically while still providingsupport. This support varies according to the amount of pipe movement.

Spring hangers shall be supported in such a manner that the rod will remain concentricwith the spring at all times and will not be subject to bending. Rollers or similarapproved supports shall be provided in the event the amount of hanger rod angular swingexceeds 4 degrees.

Spring hangers or variable supports consist of pre-compressed enclosed springs. A loadplate positioned on top of the spring is attached to the pipe so the pipe weight compressesthe spring. The spring housing transfers the support load to the building or pipe rackstructure.

There are seven types of variable spring hangers to choose from depending on the waythe spring is attached to the building/pipe rack structure or pipe. Refer to AnvilInternational Pipe Support Catalog for additional descriptions and pictures of each hanger

type.

Type A spring hangers are used where sufficient headroom is available. The spring cansshould be furnished with threaded connections and rod stops in the top plate to provide asimple attachment for the upper rod connection. Adjustment and spring loading areaccomplished by turning the load coupling or turnbuckle to achieve the desired springload or pipe elevation.

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The supports for type A spring hangers should be designed with the spring can positionedapproximately 3 to 5 feet from the pipe to provide access for inspection. A turnbuckleshall be installed between the pipe clamp and the spring can for load adjustment, unlessnoted otherwise.

Type B and type C spring hangers are used where headroom is limited, and the springcans have to be attached directly to the building or pipe rack structure. Type B springhangers have a single lug welded to the top plate of the housing. Type C spring hangersare similar to type B hangers, but instead of a single lug, type C spring hangers havedouble lugs welded to the top plate of the housing. Unless the beam attachment requiresotherwise, type B spring hangers shall be used.

Type D and type E spring hangers are used to position the spring can above the supportstructure (usually a pair of channels). Type D spring hangers are adjusted using the loadnut on top of the spring housing. Instead of a top-mounted load nut, type E springhangers are usually supplied with a turnbuckle and adjusted from below.

Type F spring hangers are designed to support piping from below. The disadvantage ofthis type is its unsatisfactory performance when subjected to significant lateral pipemovement. Pipe movement may cause the load plate to tilt, or the pipe may move off theload plate. Hanger manufacturers recommend rollers for pipe with high axialmovements.

Type G spring hangers are made up of two spring units welded to the ends of a singleangle or pair of channels in a trapeze configuration. This type of support is used whereheadroom is limited or where obstruction prohibits the use of a single spring hanger.When specifying this type of spring hanger, it is assumed that the pipe is centeredbetween the springs, each spring carrying only half the total pipe load.

Most variable supports shall have no more than 25 percent variability. Variable supportsin critical systems such as main steam, hot reheat, or cold reheat shall have less than 10percent variability. Constant supports should be used if the above variability cannot bemet.

Where designing spring pipe supports for piping systems subject to vibration, the springunit shall be attached directly to the building or pipe rack structure. If the spring can ispositioned in the middle of a long rod, piping vibration will cause the spring can toeventually bend the rod. The disadvantage of attaching the spring can to thebuilding/pipe rack structure is the difficulty of spring adjustment or inspection. Thespring can should be positioned as close as possible to the pipe and never at the middle ofa long rod.

The weight of the spring unit must be added to the specified load in setting the hot andcold loads of the spring. The weight of the components, especially the clamp weight,acting on the spring may be significant. Because the pipe load is acting on the housing ofthe spring, and the load plate is attached to the building or pipe rack structure, the weightof all components shall be taken into account if the hot or cold load settings are near thebottom of the spring hangers operating range.

Variable springs shall be equipped with a complete travel stop for steam and liquid fluidpiping systems. Travel stops for hot air or flue gas systems shall be equipped with cold

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travel stops. Load scales shall be equipped with permanently attached cold and hotbuttons. Stops should be removed after hydro test only.

6.2 Constant Supports

A constant support is a spring hanger with a mechanism located inside the springhousing. The mechanism allows a balance of spring force and the pipe weight in such away that the supporting load remains constant throughout the range of pipe travel.

In a critical piping system such as main steam, hot reheat, or cold reheat, the thermalexpansion of the piping system may reach 6 to 12 inches, but the allowable range is 6percent. Constant supports shall be used when the load variability of a spring hanger isnot acceptable.

Constant supports can generally be divided into two categories: vertical and horizontal.Constant support designs vary from one manufacturer to another. Hanger catalogs shouldbe used in choosing constant supports.

Constant pipe supports shall be designed for a 2-inch difference between the calculatedthermal movement and the total travel for pipe movements less than 4 inches. Whenpredicted pipe movements will exceed 4 inches, the support is designed for a 50 percentdifference between actual and total travel. For example, if the pipe moves 6 inches, thecalculated travel shall be 6 inches, and the total specified travel shall be 9 inches. Theconstant support should have at least 9 inch total travel.

In designing a constant support hanger, all component weights acting on the supportspring must be taken into account. The load adjustment of a constant support is muchmore limited than that of a spring hanger. As with type G spring hangers, the weight oftype G constant supports must be added to the total load acting on the support.

Constant pipe supports shall be equipped with a permanent travel stop with loadindication.

6.3 Design of Supplemental Steel

Building steel and pipe rack steel shall be used for support where practical. Supportspans shall be governed by paragraph 121.5 of ANSI/ASME B31.1 Power Piping Codewith due consideration of concentrated loading caused by valves, flanges, and otherfittings. See table 4.5 for suggested pipe support spacing.

Supplemental steel shall be designed and provided when building or pipe rack steelnecessary to conform to support requirements cannot be located.

Supplemental steel shall be designed for the larger of the pipe design loads and thehydrostatic test load.

Supplemental steel shall be designed in accordance with the requirements of the AISCManual of Steel Construction.

Support structures shall be designed with proper stiffness to prevent excessive supportdeflection that could invalidate the piping stress analysis. For critical systems, a rigid

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support should not deflect more than 1/16 inch. For non-critical systems, a deflection of1/8 inch is allowed.

Where it is necessary to frame structural members between existing steel or concrete

members, such supplemental steel shall be designed in accordance with AmericanInstitute of Steel Construction Specifications, the Uniform Building Code, or similarrecognized structural design standards.

Concrete connections shall be made only when addition of supplemental steel isimpractical.

Base plate shall be anchored to the concrete, except in cases of pure tension loading.Expansion bolts shall be wedge-type, Hilti, Kwik bolts, or equal. Use maximumembedment length recommended by manufacturer.

Concrete beam attachments shall be bolted through or welded to cast-in place insertplates.

Pipe supports shall not be attached to concrete block walls.

7.0 REFERENCES

American Institute of Steel Construction (AISC). AISC Manual of Steel Construction

American Society of Mechanical Engineers.ASME B31.1 Power PipingASME B31.3 Process PipingASME Boiler and Pressure Vessel Code

American Society of Testing and MaterialsAmerican Welding Society.

AWS D1.1 Structural Welding Code Steel

Anvil International, Inc. Pipe Hangers Catalog

Manufacturers Standardization Society of the Valve and Fitting Industry.MSS SP-58 Pipe Hangers and Supports Materials and Fitting IndustryMSS SP-69 Pipe Hangers and Supports Selection and ApplicationMSS SP-77 Guidelines for Pipe Support Contractual ArrangementsMSS SP-89 Pipe Hangers and Supports Fabrication and Installation PracticesMSS SP-127 Bracing for Piping Systems Seismic-Wind-Dynamic Design, Selection,Application

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ENGINEERING STANDARDS AND GUIDELINES APPENDIX A


1 OF 68

Appendix A:Standard Support Details

Index

1.0 GENERAL NOTES

2.0 RIGID BASE SUPPORT

2.1 RBS-1: Pipe On Steel2.2 RBS-2: Adjustable Pipe Stanchion Support2.3 RBS-3: Non-Adjustable Pipe Stanchion Support2.4 RBS-4: Pipe Clamp and Stanchion Support2.5 RBS-5: Pipe Covering Protection Saddle

2.6 RBS-6: Pipe Shoe, 8 and Smaller2.7 RBS-7: Pipe Shoe, 10 and Larger2.8 RBS-8: Pipe Slide Bearing2.9 RBS-9: Dummy Leg Supports2.10 RBS-10: U-Bolt Support2.11 RBS-11: Insulation Shield Support2.12 RBS-12: Insulation Shield U-Bolt Support2.13 RBS-13: Riser Clamp Support2.14 RBS-14: Riser Trunion Support2.15 RBS-15: Thin Wall Pipe Rigid Support, 2-122.16 RBS-16: Thin Wall Pipe Rigid Support, 14-48

3.0 RIGID HANGER SUPPORT

3.1 RHS-1: Pipe Clevis Rod Hanger3.2 RHS-2: Double Bolt Pipe Clamp Rod Hanger3.3 RHS-2A: Alloy Double Bolt Pipe Clamp Rod Hanger3.4 RHS-3: Riser Clamp Rod Hanger3.5 RHS-4: Trapeze Rod Hanger3.6 RHS-5: Thin Wall Pipe Rod Hanger

4.0 GUIDE BASE SUPPORT

4.1 GBS-1: Guide U-Bolt4.2 GBS-2: Guide Adjustable Pipe Stanchion and U-Bolt4.3 GBS-3: Guide Pipe Covering Protection Saddle and U-Bolt4.4 GBS-4: Guide Stanchion and Plate4.5 GBS-5: Guide Pipe Shoe, 8 and Smaller4.6 GBS-6: Guide Pipe Shoe, 10 and Larger4.7 GBS-7: Guide Pipe Covering Protection Saddle4.8 GBS-8: Riser Guide Pipe Saddle and U-Bolt

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4.9 GBS-9: Riser Guide With Stanchion4.10 GBS-10: U-Bolt Supports For Light Loads4.11 GBS-11: Pipe Slide Bearing Guide4.12 GBS-12: Insulation Shield Support Guide4.13 GBS-13: Thin Wall Pipe Guide Support, 2-124.14 GBS-14: Thin Wall Pipe Guide Support, 14-48

5.0 LIMIT BASE SUPPORT

5.1 LBS-1: Limit Stop Saddle and Tees5.2 LBS-2: Limit Stop Pipe Shoe, 8 and Smaller5.3 LBS-3: Pipe Shoe, 10 and Larger

6.0 ANCHORED BASE SUPPORT

6.1 ABS-1: Anchor Horizontal Pipe (Concrete)6.2 ABS-2: Anchor Horizontal Pipe (Steel)6.3 ABS-3: Anchor Pipe Riser6.4 ABS-4: Anchor Pipe Shoe, 8 and Smaller6.5 ABS-5: Anchor Pipe Shoe, 10 and Larger6.6 ABS-6: Non-Adjustable Pipe Stanchion Anchor6.7 ABS-7: Thin Wall Pipe Anchor Support, 2-126.8 ABS-8: Thin Wall Pipe Anchor Support, 14-486.9 ABS-9: Pipe Anchor Support, 1-24

7.0 SPRING HANGER SUPPORT

7.1 SHS-1: Variable Spring Type B Spring7.2 SHS-2: Variable Spring Type C Spring7.3 SHS-3: Variable Spring Type D and Type E Spring7.4 SHS-4: Variable Spring Type F Spring7.5 SHS-5: Variable Spring Type G Spring7.6 SHS-6: Variable Spring Trapeze7.7 SHS-7: Variable Spring On Riser

8.0 CONSTANT HANGER SUPPORT

8.1 CHS-1: Constant Spring Type B Support8.2 CHS-2: Constant Spring Type C Support8.3 CHS-3: Constant Spring Type D Support8.4 CHS-4: Constant Spring Type E Support8.5 CHS-5: Constant Spring Type G Support

9.0 DETAILS

9.1 Detail-1: Base Plate Detail Pipe Stanchion

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9.2 Detail-2: Anchored Base Plate Detail Pipe Stanchion9.3 Detail-3: Upper Rod Hanger Assembly9.4 Detail-4: Shoe Table and Notes

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6.0 Anchored Base Support

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ENGINEERING STANDARDS AND GUIDELINES APPENDIX B

MECHANICAL SUPPLEMENTAL STEEL

1 OF 58

Appendix B:Supplemental Steel

Index

1.0 DESIGN RULES FOR SUPPLEMENTAL STEEL

2.0 BEAM TO BEAM

2.1 1A: Span Between Beams2.2 1B: Span Under Beam2.3 1C: Span Underside Beams With Overhang2.4 1D: Span Over the Beams

3.0 BETWEEN COLUMNS

3.1 2A: Steel to Steel3.2 2B: Concrete to Steel

4.0 COLUMN TO COLUMN

4.1 3A: Side of Column/Under Beam4.2 3B: Side of Column/Above Beam4.3 3C: Side of Column/Under Beam with Extension

5.0 FLOOR BRACED MEMBER

5.1 4A: Floor Braced Tier

6.0

EXTENDED MEMBER6.1 5A: Horizontal Cantilever6.2 5B: Vertical Cantilever6.3 5C: From Side of Beam6.4 5D: Cantilever From Underside of Beam6.5 5E: Vertical Cantilever Angle6.6 5F: Straddle Underside of One Beam6.7 5G: From Side of Column

7.0 CANTILEVER

7.1 6A: Cantilever Underside Unequal Beams7.2 6B: Cantilever Underside Equal Beams7.3 6C: Modified Structural Trapeze

8.0 KNEE BRACES

8.1 7A: Knee Brace From Column8.2 7B: Knee Brace Tier From Column8.3 7C: Cantilever From Column8.4 7D: Cantilever From Concrete Wall8.5 7E: Bolted Cantilever From Column8.6 7F: Cantilever Angle Frame From Vessel

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8.7 7G: Riser Support Frame From Vessel8.8 7H: Riser Guide Frame From Vessel8.9 7J: Sway Brace For Riser8.10 7K: Riser Guide Frame Off Beam

8.11 7L: Riser Guide Frame Off Column

9.0 TRAPEZES

9.1 8A: Single Tier Structural Trapeze9.2 8B: Double Tier Structural Trapeze9.3 8C: Triple Tier Structural Trapeze9.4 8D: Structural Trapeze Equal Legs9.5 8E: Structural Trapeze Unequal Legs9.6 8F: Under Beam-Angle Frame9.7 8G: Trapeze With Extension Under Beam9.8 8H: Straddle Underside Beam w/Trapeze

9.9

8J: Lateral Strut

10.0TEE POLES

10.1 9A: Structural Tee Pole10.2 9B: Tee Pole 4 Diameter Pipe10.3 9C: Tee Pole 6 Diameter Pipe10.4 9D: Offset Tee Pole10.5 9E: Pipe Stand10.6 9F: Angle Pipe Stand

11.0 MISC. UTILITY BENTS

11.1 10A: Single Tier Support From Floor

12.0 PLATE MOUNTED ON CONCRETE

12.1 11A: Plate Mounted on Concrete

12.2 11B: FRP Vessel Lug

13.0 U-DRAIN SUPPORTS

13.1 12A: U-Drain Support

13.2 12B: U-Drain Support (FRP & HDPE Pipe)

14.0 SHIM STEEL

14.1 13A: Shim Steel

15.0 SUPPORT FOUNDATIONS

15.1 14A: Pipe Stanchion Foundation15.2 14B: Pipe Support Pier15.3 14C: Pipe Stanchion on Concrete Slab

16.0 PIPE STAND

16.1 15A: Pipe Stand 4 and Smaller Pipe

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17.0 ACCEPTABLE CONNECTION DETAILS

17.1 Connection Details 1 of 217.2 Connection Details 2 of 2

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1.0 Design Rules for Supplemental Steel

1. The pipe support contractor can usually use existing steel or provide relatively light steelmembers for the piping supports. SCS Engineering need not be involved unless the loads aregreater than 3000 lb or introduce a moment greater than 1000 ft-lb into the structure. Whensupporting from bar joist, the pipe support contractor shall coordinate with SCS Engineeringany loads which exceed 500 lb. These loads shall be applied at panel points only. Pipes shallnot be supported from building girts.

2. When loads exceed 3000 lb or 1000 ft-lb, coordination with the SCS Engineering CivilDepartment is necessary. The SCS Engineering Civil Department will analyze the buildingframe, pipe bridge, or support structure for its ability to support the loads. If the investigationrequires that the support structure be modified or reinforced to accommodate the pipingloads, the modifications will be shown on the structural drawings. The SCS EngineeringCivil Department will also show supplemental steel for piping supports meeting the aboveload criteria where structural drawings have been prepared for buildings, pipe bridges, and

other structures.

3. Pipe bridges, T-poles requiring foundations or exceeding the limits of 9A, 9B, or 9C, andsleeper-type supports will be designed by the structural department and shown on structuraldrawings.

4. As the piping analysis problems are completed, data will be transmitted in writing to the pipesupport contractor. This data will consist of isometrics of the piping with locations, supportsupplemental steel configurations, and loads. The pipe support contractor and SCSEngineering should hold a periodic review be to evaluate the supplemental steel added forpiping supports.

5. Standard structural connection details are shown and may be used at the contractors option.Structural connections should be chosen to minimize fit-up and field welding.

6. No supplemental steel member shall be added to roofing trusses or light weight Z purlinswithout consulting SCS Engineering.

7. Whenever welds are made to galvanized steel, the area must be cleaned and passivated afterwelding. Cold galvanized spray paint (Galvicon or equal) shall be applied to the area.

8. Stop plates (1/4 in thick plate minimum) must be added to the end of steel members wherethe pipe rests on top of a steel section with no other lateral restraint.

9. The stop plate shall be eliminated when the pipe support on the supplemental steel is ananchor or a guide.

10.SCS Engineering and the pipe support contractor must agree to any deviation to items 1through 9 prior to detailed engineering.

11.The supplemental support steel shall have a protective coating consistent with the structuralsteel to which it connects. Surfaces to be painted shall be cleared and coated in accordancewith Technical Specification Sections 09910 (SHOP PAINTING) and 09912 (FIELD

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PAINTING). Surfaces to be galvanized shall be cleaned and coated in accordance withSection 09915 (HOT DIP GALVANIZING). Field repair of damaged zinc coating shall be inaccordance with ASTM A730, Section 4.2.1 and Annex A1.

12.All welds on supplemental steel shall be a minimum of 3/16 in unless noted otherwise.

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2.0 Beam to Beam

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11.0 Misc. Utility Bents

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12.0 Plate Mounted on Concrete

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PLAN

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14.0 Shim Steel

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16.0 Pipe Stand

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17.0 Acceptable Connection Details

(W/ WELDED OR BOLTED

CLIP ANGLE)


CLIP ANGLE & BEAM COPED)


CLIP ANGLE)(W/ WELDED BASE PLATE)(W/ BOLTED GUSSET PLATE)

(W/ BOLTED CLIP ANGLE)(W/ WELDED CLIP ANGLE)

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(WELDED OR BOLTED)(WELDED OR BOLTED)(W/ CLIP ANGLES)

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ENGINEERING STANDARDS AND GUIDELINES APPENDIX CMECHANICAL FRP PIPE SUPPORTS

2 OF 30

Appendix C

FRP Standard Support Details

Index

1.0 Introduction

1.1. Purpose

1.2. Scope

2.0 Codes and Standards

3.0 Design Criteria and Guidelines

3.1. General Design Consideration3.2. FRP Pipe Supports

3.3. Supplementary Steel3.4. FRP Pipe Support Spacing

4.0 General Notes for FRP Pipe Supports

5.0 Rigid Supports

5.1. FSR-1: Fiberglass Pipe Cradle Support, 1-4

5.2. FSR-2: Fiberglass Pipe Cradle Support, 6-425.3. FSR-3: Fiberglass Insulated Pipe Support, 2-42

5.4. FSR-4: Valve/Pipe Flange Support, 2-42

5.5. FSR-5: Light Duty Fiberglass Pipe Hanger, 2-205.6. FSR-6: Fiberglass Pipe Component Hanger, 2-425.7. FSR-7: Fiberglass Pressure Pipe Clamp Hanger, 2-42

5.8. FSR-8: Fiberglass Pipe Riser Hanger, 2-425.9. FSR-9: Component Riser Support, 2-425.10.FSR-10: Fiberglass Pipe Riser Support, 2-42

5.11.Detail-FSR-11: Stanchion Flange Support, 2-42

6.0 Guide Supports

6.1. FSG-1: Fiberglass Pipe Cradle Guide, 1-4

6.2. FSG-2: Fiberglass Pipe Support Guide, 6-426.3. FSG-3: Fiberglass Insulated Pipe Support Guide, 2-426.4. FSG-4: Valve/Pipe Flange Guide, 2-42

6.5. FSG-5: Fiberglass Pipe Riser Guide, 2-426.6. FSG-6: Fiberglass Pipe Braced Hanger Guide

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7.0 Anchored Supports

7.1. FSA-1: Fiberglass Pipe Anchor, 2-4

7.2. FSA-2: Fiberglass Pipe Anchor, 6-427.3. FSA-3: Fiberglass Insulated Pipe Anchor, 2-42

7.4. FSA-4: Valve/Pipe Flange Anchor, 2-427.5. Detail-FS1: Fiberglass Pipe Shear Collar

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FRP PIPE SUPPORTS

1.0 Introduction

1.1 Purpose

The purpose of this chapter is intended to serve as a guide to the proper use of pipe hangers and

supports of fiber glass piping system. The document is not intended to supersede project specificdesign criteria but to reflect Mechanical Design Standards.

1.2 Scope

This standard shall apply to pipe supports for FRP piping systems ranging in size up to 42

inches, unless noted otherwise.

Design of FRP pipe supports shall be the responsibility of Design Engineering. Design criteriaand guidelines are given in Section 3.0 of this Appendix C. FRP pipe supports shall be specified

after a thorough support evaluation or pipe stress analysis has been performed, unless notedotherwise.

NOTEFRP piping systems containing FRP supports is typically designed as an

engineered system of supports. Design of FRP engineered supports willinclude standard FRP pipe supports represented in the following sections.


FRP pipe support design is governed by the codes and standards that apply to the FRP piping

system. The designer should be familiar with the support design portions of the applicablecodes. The following standards are applicable to FRP piping systems and FRP pipe support

systems.

American Society of Mechanical Engineers.

ASME Standard B31.3 Process Piping(Addresses primarily metallic piping, but it is expanded to cover Non-metallic piping

including thermoplastic and thermo set piping system.)

NBS Voluntary Product Standard PS 15-69.


3.1 General Design Consideration

The principles of design and analysis for FRP pipe differ considerably from the principles ofdesign for metallic pipe. The analysis of steel pipe normally begins with maximum flexibility

and the final support-guide-anchor design ends when allowable stresses and loads are achieved.

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When analyzing FRP pipe, the analysis normally begins with a semi rigid system and the final

support-guide-anchor configuration is established when the minimum stress condition is reached,based on the available structural support structures. Long straight runs can use a fully anchored

approach for smaller diameter pipe (

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3.3 Supplementary steel

Building steel and pipe rack steel shall be used for support where practical.

Supplementary steel shall be designed and provided where building steel or pipe rack steel is notavailable. Refer to Appendix B of this Standard for supplemental steel requirements.

Supplementary steel shall be designed for the larger of the pipe design loads or the hydrostatic

test load.

Supplementary steel shall be designed in accordance with the requirements of the AISC Manualof Steel Construction.

3.4 FRP Pipe Support Spacing

Horizontal FRP piping shall be supported to prevent excessive sag, bending and shear stresses in

the piping. Special design consideration shall be given where components such as flanges andvalves impose concentrated loads.

Vertical FRP pipe shall be supported to prevent the pipe from being overstressed due to the

combination of all loading effects.

Where stress analysis calculations are not made, FRP pipe manufacturer recommendedmaximum spacing requirements, reduced by 20%, shall be used.

The following table of recommended FRP pipe support spacing shall be used for FRP pipes

manufactured by Reinforced Plastic Systems Inc. only. This table is based on the criteria ofStrength Ratio (SR) in structure greater than 1.6; and deflection less than 0.50 inch.

TABLERecommended FRP Pipe Support Spacing

Support spacing (ft.) @ 150 deg. F0

For RPS P150 & A150 piping

Nominal Pipe

Diameter

Single Span

SG=1.0

Single Span

SG=1.3

Continuous Span

SG=1.0

Continuous Span

SG=1.3

1 7.0 7.0 9.0 9.0

1-1/2 7.3 7.1 9.3 8.7

2 8.0 7.5 9.8 9.2

3 8.4 7.7 10.3 9.5

4 8.7 8.0 10.7 9.8

6 10.9 10.0 13.3 12.2

8 10.9 10.0 13.1 12.0

10 13.0 11.6 15.6 13.9

12 13.7 13.0 16.4 15.6

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14 13.7 13.0 16.4 15.6

16 15.2 14.0 18.2 16.8

18 16.7 15.0 20.0 18.0

20 17.4 15.5 20.9 18.6

24 19.1 17.0 22.9 20.430 20.5 18.3 24.6 22.0

36 22.1 19.7 26.5 23.6

CAUTION NOTE: Above values shall not be used for spans having concentrated loads, such as valves,branch connections, etc., where excessive vibration or pulsation is expected. Support spans, near or

around a bend, shall be reduced by 1/3.

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4.0 General Notes for FRP Pipe Supports

1. Hangers shall be fabricated from 3/16, 1/4, 3/8, or 1/2 thick plate per ASTM A36, unless

noted.

2. All hanger hardware shall be galvanized unless otherwise specified. Where galvanizing isdamaged by welding and/or by drilling, one coat of a non-toxic, zinc-rich compound (such as

DRYGALV by American Solder and Flux Company or approved equivalent) at 5.0 milsdry film thickness shall be applied. Support assembly shall not be installed until repair

coating is cured.

3. Supports shall be designed to fit the O.D. of the pipe and must be located to clear all pipewraps at fittings and shop or field joints.

4. FSG-1 guides shall have special u-bolt clearances as indicated in the detail. Under no

circumstances shall FRP pipe be clamped tightly by u-bolt or supported without a cradle.

5. All cradle or clamp type supports that contact the O.D. of the pipe shall include anelastomeric liner bonded to the cradle.

6. Flanged component supports, such as FSR-4, shall be used to support components such as

valves. The length of flange bolts must be increased approximately 1/2. All thread rodsshall be used in lieu of bolts for ease of installation, unless stated otherwise.

7. Component supports 12 diameter and larger shall be scalloped to provide clearance for the

flange hub reinforcement specified in National Bureau of Standards Voluntary ProductStandard PS-15-69.

8. Support details call-out Jove # FS-XX refers to support model number published by JTI

Manufacturing, Inc., Birmingham, AL, and is for reference only. FRP supports by BrittEngineering of Birmingham, AL and Maverick Applied Science of Palmetto, FL are also

acceptable; any others must be approved in writing by Southern Company MechanicalDepartment.

9. Rod hanger component designations for support details FSR-5, FSR-6, FSR-7, FSR-8 and

FSG-6 shall be based on the Anvil, formerly Grinnell, numbering system.

10. FRP pipe supports with an S suffix (ex. FSR-2S, FSG-2S, etc.) are non-standard supports.If dimensions are different than shown in standard detail, dimensions shall be specified with

non-standard call-out (etc. FSR-2S, L=15).

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5.0 Rigid Supports

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6.0 Guide Supports

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7.0 Anchor Supports

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ENGINEERING STANDARDS AND GUIDELINES APPENDIX DMECHANICAL HDPE PIPE SUPPORTS

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Appendix D:

HDPE Standard Support Details

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Appendix D:

HDPE Standard Support Details

Index1.0 Introduction

1.1. Purpose

1.2. Scope



3.1. General Design Consideration3.2. HDPE Pipe Supports3.3. Supplementary Steel

3.4. HDPE Pipe Support Spacing

4.0 General Notes for HDPE Pipe Supports

5.0 Rigid Supports

5.1. HPR-1: HDPE Pipe Rigid Support, 2-36

5.2. HPR-2: HDPE Pipe Rigid Support, 2-365.3. HPR-3: HDPE Pipe Riser Support, 2-125.4. HPR-4: HDPE Pipe Rod Hanger, 2-20

5.5. HPR-5: HDPE Pipe Component Hanger, 2-36

5.6. HPR-6: HDPE Pipe Riser Component Support, 2-36

5.7. HPR-7: HDPE Pipe Rod Hanger, 2-205.8. HPR-8: HDPE Pipe Riser Hanger, 2-16

6.0 Guide Supports

6.1. HPG-1: HDPE Pipe Guide, 2-366.2. HPG-1A: HDPE Pipe Guide, 2-16

6.3. HPG-2: HDPE Pipe Guide, 2-366.4. HPG-3: HDPE Pipe Riser Guide, 2-6

6.5. HPG-4: HDPE Pipe Riser Guide, 8-12

7.0 Anchor Supports

7.1. HPA-1: HDPE Pipe Friction Anchor, 2-36

7.2. HPA-1A: HDPE Pipe Friction Anchor, 2-167.3. HPA-2: HDPE Pipe Friction Anchor, 2-36

7.4. HPA-3: HDPE Pipe Riser Anchor, 2-67.5. HPA-4: HDPE Pipe Riser Anchor, 8-127.6. HPA-5: HDPE Pipe Anchor, 2-36

7.7. HPA-6: HDPE Pipe Anchor, 2-36

7.8. HPA-7: HDPE Pipe Riser Component Anchor, 2-367.9. HPA-8: HDPE Pipe Anchor, 2-36

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7.10. HPA-9: HDPE Pipe Anchor, 2-36

7.11. HPA-10: HDPE Pipe Positive Anchor, 4-16

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HDPE PIPE SUPPORTS

1.0 Introduction

1.1 Purpose

The purpose of this chapter is intended to serve as a guide to the proper use of pipe hangers and

supports of High Density Polyethylene, normally called HDPE piping system. The document isnot intended to supersede project specific design criteria but to reflect Mechanical Design

Standards.

1.2 Scope

This standard shall apply to HDPE pipe supports for piping systems ranging in size up to 36inches, unless noted otherwise. Design of HDPE pipe supports shall be the responsibility of

Design Engineering. Design criteria and guidelines

Documents

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