Section 15096 PIPE HANGERS AND SUPPORTS

Section 15096

PIPE HANGERS AND SUPPORTS

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. This Section specifies hangers and supports for all piping systems specified in Section

15050. This Section does not include pipe supports for fire sprinkler systems, pipe anchors, guides or seismic restraints.

B. The hangers and supports specified in this Section are provided to resist pipe loads occurring primarily in the downward (gravity) direction. For the purpose of pipe hanger and support selection, this Section establishes pipe support classifications based on the operating temperatures of the piping contents. Pipe support classifications are as follows:

1. Hot Systems

A - 1. 120 degrees F to 450 degrees F A - 2. 451 degrees F to 750 degrees F A - 3. Over 750 degrees F

2. Ambient Systems

B - 60 degrees F to 119 degrees F

3. Cold Systems

C - 1. 33 degrees F to 59 degrees F C - 2. -20 degrees F to 32 degrees F

C. Hanger and Support Selection

1. The Contractor shall select pipe hangers and supports as specified in the Contract Documents. Selections shall be based upon the pipe support classifications specified in this Section, the piping insulation thickness specified, and any special requirements that may be specified in the Contract Documents.

2. The Contractor shall review the piping layout in relation to the surrounding structure and adjacent piping and equipment before selecting the type of support to be used at each hanger point.

3. Hangers and supports shall withstand all static and specified dynamic conditions of loading to which the piping and associated equipment may be subjected. As a minimum, consideration shall be given to the following conditions:

a. Weights of pipe, valves, fittings, insulating materials, suspended hanger components, and normal fluid contents.

b. Weight of hydrostatic test fluid or cleaning fluid if normal operating fluid contents are lighter.

c. Reaction forces due to the operation of safety or relief valves. d. Wind, snow or ice loadings on outdoor piping.

4. Hangers and supports shall be sized to fit the outside diameter of pipe, tubing, or, where specified, the outside diameter of insulation.

5. Where negligible movement occurs at hanger locations, rod hangers shall be used for suspended lines, wherever practical. For piping supported from below, bases, brackets or structural cross members shall be used.

6. Hangers for the suspension of size 2 1/2 inches and larger pipe and tubing shall be capable of vertical hanger component adjustment under load.

7. The supporting systems shall provide for and control the free or intended movement of the piping including its movement in relation to that of connected equipment.

8. Where there is horizontal movement at a suspended type hanger location, hanger components shall be selected to allow for swing. The vertical angle of the hanger rod shall not, at any time, exceed 4 degrees.

9. There shall be no contact between a pipe and hanger or support component of dissimilar metals. Prevent contact between dissimilar metals when supporting copper tubing by use of copper-plated, rubber, plastic or vinyl coated, or stainless steel hanger and support components.

10. Unless otherwise specified, existing pipes and supports shall not be used to support new piping.

11. Unless otherwise specified, pipe support components shall not be attached to pressure vessels.

12. Stock hanger and support components shall be used wherever practical.

1.2 REFERENCES

A. This Section contains references to the following documents. They are a part of this Section as specified and modified. In case of a conflict between the requirements of this Section and those of the listed documents, the requirements of this Section shall prevail.

AISC Manual of Steel American Institute of Steel Construction, Construction Manual of Steel Construction, Allowable Stress Design - 9th Edition

MSS SP-58-88 Pipe Hangers and Supports - Materials, Design and

Manufacture

MSS SP-69-83 Pipe Hangers and Supports - Selection and Application

FEDSPEC Hangers and Supports, Pipe

WW-H-171e-78

MFMA-1-84 Metal Framing Standards Publication

PART 2 - PRODUCTS

2.1 ACCEPTABLE PRODUCTS

A. Standard pipe supports and components shall be manufactured by B-Line, Carpenter & Patterson, Kin-Line, Anvil, Michigan, Pipe Shields Incorporated, Superstrut, Unistrut, or equal. Pipe support components shall conform to the requirements of MSS SP-69 and FEDSPEC WW-H-171e. Pipe support materials shall conform to the requirements of MSS SP-58. Metal framing system components shall conform to the metal framing manufacturers' Association Standard MFMA-1.

2.2 MATERIALS

A. Unless otherwise specified, pipe hangers and supports, structural attachments, fittings and accessories shall be hot-dip or mechanically galvanized after fabrication. Nuts, bolts and washers may be zinc-plated except for those subject to moisture or corrosive atmosphere, which shall be type 304 stainless steel.

B. Pipe Hangers and Supports

1. Type 1 – Clevis Pipe Hanger: Clevis hangers shall be carbon steel with configuration and components equivalent to MSS and FEDSPEC Type 1.

a. Steel pipe (insulated) shall be B-Line B3100, Anvil Fig. 260, or equal, with insulation shield.

b. Steel pipe (uninsulated) shall be B-Line B3100, Anvil Fig. 260, or equal.

c. Cast and ductile iron pipe shall be B-Line B3102, Anvil Fig. 590, or equal.

d. Copper pipe (uninsulated) shall be B-Line B3104 CT, Anvil Fig. CT-65, or equal.

e. Copper pipe (insulated) shall be B-Line B3100, Anvil Fig. 260, or equal, with insulation shield.

f. Plastic pipe shall be B-Line B3100 C, Carpenter & Patterson Fig. 100PVC, or equal.

2. Type 2 - "J" Pipe Hanger: Hangers shall be carbon steel with configuration and components equivalent to MSS Type 5. This hanger shall be used only on uninsulated pipe.

a. Steel pipe shall be B-Line B3690, Anvil Fig. 67, Michigan model 418, or equal.

b. Copper and plastic pipe shall be Michigan model 419, Unistrut J 1205N

series, or equal.

3. Type 3 – Double Bolt Pipe Clamp: Pipe clamp shall be carbon steel, with configuration and components equivalent to MSS and FEDSPEC Type 3.

a. Steel pipe (insulated) shall be B-Line B3144, Anvil Fig. 295, or equal, with insulation shield. Insulation shield is optional for hot and ambient systems.

b. Steel pipe (uninsulated) shall be B-Line B3144, Anvil Fig. 295, or equal.

c. Copper pipe (insulated only) shall be B-Line B3144, Anvil Fig. 295, or equal, with insulation shield.

4. Type 4 – Adjustable Roller Hanger: Rollers shall be cast iron, yoke and cross bolt shall be carbon steel. Configuration and components shall be equivalent to MSS Type 43 and FEDSPEC Type 44.

a. Steel pipe (insulated) shall be B-Line B3110, Anvil Fig. 181, or equal, with insulation shield.

b. Steel pipe (uninsulated) shall be B-Line B3110, Anvil Fig. 181, or equal.

c. Copper pipe (insulated only) shall be B-Line B3110, Anvil Fig. 181, or equal, with insulation shield.

d. Plastic pipe shall be B-Line B3110, Anvil Fig. 181, or equal.

5. Type 5 – Single Pipe Roll: Rollers and sockets shall be cast iron, cross rod shall be steel. Configuration and components shall be equivalent to MSS Type 41 and FEDSPEC Type 42.

a. Steel pipe (insulated) shall be B-Line B3114, Anvil Fig. 171, or equal, with insulation shield.

b. Steel pipe (uninsulated) shall be B-Line B3114, Anvil Fig. 171, or equal. c. Plastic pipe shall be B-Line B3114, Anvil Fig. 171, or equal.

6. Type 6 – Framing Channel Pipe Clamp: Pipe clamps shall be steel with galvanized finish and material thickness as listed below:

a. Steel pipe (uninsulated): Pipe size 3/8 inch and 1/2 inch shall be 16 gage;

3/4 inch through 1 1/4 inches shall be 14 gage; 1 1/2 inches through

3 inches shall be 12 gage; 3 1/2 inches through 5 inches shall be 11 gage;

6 and 8 inches shall be 10 gage; Michigan model 431, Powerstrut PS

1100, Unistrut P 1109 series, or equal.

b. Steel pipe (insulated): Pipe clamp shall be as described in Paragraph

15096-2.2 B.6.a with insulation shield.

c. Copper (uninsulated) and plastic pipe: Pipe size 3/8 inch and 1 inch shall be 16 gage; 1-1/4 inches and 1-1/2 inches shall be 14 gage; 2 inches through 3 inches shall be 12 gage; 4 inches shall be 11 gage; clamp shall be copper-plated, plastic coated or lined with dielectric material; Michigan model 432, Powerstrut PS 1200, Unistrut P 2024C and P 2024PC series, or equal.

d. Copper pipe (insulated): Pipe clamp shall be as described in Paragraph

15096-2.2 B.6.a with insulation shield.

7. Type 7 - U-Bolt: U-bolts shall be carbon steel with configuration equivalent to MSS

and FEDSPEC Type 24.

a. Steel pipe (uninsulated) shall be Anvil Fig. 137, B-Line B3188, or equal.

b. Steel pipe (insulated) shall be Anvil Fig. 137, B-Line B3188, or equal, with insulation shield.

c. Cast and ductile iron pipe shall be Anvil Fig. 137, B-Line B3188, or equal.

d. Copper pipe (uninsulated) shall be Carpenter & Patterson Fig. 222 CT, B- Line B3501 CT, Anvil Fig. 137C, or equal.

e. Copper pipe (insulated) shall be Anvil Fig. 137, B-Line B3188, or equal, with insulation shield.

f. Plastic pipe shall be Anvil Fig. 137C, Michigan model 151, B-Line B3188

C, or equal.

8. Type 8 – Adjustable Pipe Roll Support: Rollers and sockets shall be cast iron, cross rod and support rods shall be carbon steel.

a. Steel pipe (insulated) shall be B-Line B3122, Anvil Fig. 177, or equal, with insulation shield.

b. Steel pipe (uninsulated) shall be B-Line B3122, Anvil Fig. 177, or equal.

c. Copper pipe (insulated only) shall be B-Line B3122, Anvil Fig. 177, or equal, with insulation shield.

d. Plastic pipe shall be B-Line B3122, Anvil Fig. 177, or equal.

9. Type 9 – Welded Pipe Stanchion: Minimum material thickness shall be standard schedule carbon steel pipe, cut to match contour of the pipe elbow. Use of this support shall be limited to ambient systems only.

10. Type 10 – Pipe Stanchion Saddle: Saddles and yokes shall be carbon steel and comply with MSS Type 37 and FEDSPEC Type 38.

a. Steel pipe (insulated) shall be Carpenter & Patterson Fig. 125, B-Line

B3090, or equal, with insulation shield.

b. Steel pipe (uninsulated) shall be Carpenter & Patterson Fig. 125, B-Line

B3090, or equal.

c. Cast and ductile iron pipe shall be Carpenter & Patterson Fig. 125, B-Line

B3090 NS, or equal.

d. Copper pipe (uninsulated) shall be Carpenter & Patterson Fig. 125, B-Line

B3090, or equal, with insulation shield or lined with dielectric material.

e. Copper pipe (insulated) shall be Carpenter & Patterson Fig. 125, B-Line

B3090, or equal, with insulation shield.

f. Plastic pipe shall be Carpenter & Patterson Fig. 125, B-Line B3090, or equal.

11. Type 11 – Offset Pipe Clamp: Pipe clamp shall be carbon steel with configuration and components as specified and shall be of standard design manufactured by a pipe hanger component manufacturer.

a. Steel pipe (insulated) shall be B-Line B3148, Anvil Fig. 103, or equal, with insulation shield.

b. Steel pipe (uninsulated) shall be B-Line B3148, Anvil Fig. 103, or equal.

c. Cast and ductile iron pipe shall be B-Line B3148 NS, Anvil Fig. 103, or equal.

d. Copper pipe (insulated) - shall be B-Line B3148, Anvil Fig. 103, or equal, with insulation shield.

e. Copper pipe (uninsulated) shall be B-Line B3148, Anvil Fig. 103, or equal, lined with dielectric material.

f. Plastic pipe shall be B-Line B3148, Anvil Fig. 103, or equal.

g. Vertical pipe support applications shall be as specified above except that insulation shields shall not be used for insulated pipe.

12. Type 12 - Riser Clamp: Riser clamp shall be carbon steel with configuration and components equivalent to MSS and FEDSPEC Type 8.

a. Steel pipe (insulated) shall be B-Line B3373, Anvil Fig. 261, or equal.

b. Steel pipe (uninsulated) shall be B-Line B3373, Anvil Fig. 261, or equal.

c. Cast and ductile iron pipe shall be B-Line B3373, Anvil Fig. 261, or equal.

d. Copper pipe (insulated) shall be B-Line B3373 CT, Anvil Fig. CT-121, Michigan model 511, or equal.

e. Copper pipe (uninsulated) shall be B-Line B3373 CT, Anvil Fig. CT-121, Michigan model 511, or equal.

f. Plastic pipe shall be B-Line B3373, Anvil Fig. 261c, or equal.

13. Type 13 - Framing Channel Pipe Strap: Pipe strap shall be carbon steel, with configuration equivalent to MSS Type 26.

a. Steel pipe (uninsulated) shall be Superstrut No. C-708-U, Powerstrut PS

3126, Kin-Line No. 477, or equal.

b. Steel pipe (insulated) shall be Superstrut No. C-708-U, Powerstrut PS

3126, Kin-Line No. 477, or equal, with insulation shield.

c. Copper pipe (uninsulated) shall be Superstrut No. C-708-U, Powerstrut PS

3126, Kin-Line No. 477, or equal, with insulation shield or lined with dielectric material.

d. Copper pipe (insulated) shall be Superstrut No. C-708-U, Powerstrut PS

3126, Kin-Line No. 477, or equal, with insulation shield.

e. Plastic pipe shall be Superstrut No. C-708-U, Powerstrut PS 3126, Kin- Line No. 477, or equal.

C. Rack and Trapeze Supports

1. General: Unless otherwise specified, trapeze and pipe rack components shall have a minimum steel thickness of 12 gage, with a maximum deflection 1/240 of the span.

2. Type 20 - Trapeze Pipe Support: Trapeze pipe support cross members shall be framing channel as specified in Paragraph 15096-2.2 E.5. Flat plate fittings shall be 1 5/8-inch square carbon steel of standard design manufactured by framing channel manufacturer, Unistrut P2471, B-Line B202-2, or equal.

3. Type 21 - Pipe Rack Support: Post and cross members shall be framing channel as specified in Paragraph 15096-2.2 E.5. Pipe rack fittings shall be carbon steel, of standard design manufactured by framing channel manufacturer. 90-degree fittings shall be gusseted Unistrut P2484, B-Line B844, or equal. Post base fittings shall be as specified in Paragraph 15096-2.2 D.5.

D. Structural Attachments

1. Type A – Malleable Iron Concrete Insert: Concrete inserts shall be malleable iron and comply with MSS and FEDSPEC Type 18. Anvil Fig. 282, Carpenter & Patterson Fig. 108, or equal.

2. Type B - Side Beam Bracket: Bracket shall be malleable iron and comply with

MSS Type 34 and FEDSPEC Type 35. Anvil Fig. 202, B-Line B3062, or equal.

3. Type C - Malleable Beam Clamp with Extension Piece: Clamp and extension piece shall be malleable iron, tie rod shall be steel. Beam clamp shall comply with MSS and FEDSPEC Type 30. Anvil Fig. 218 with Fig. 157 extension piece, B-Line B3054, or equal.

4. Type D - Steel Beam Clamp with Eye Nut: Beam clamp and eye nut shall be forged steel. Configuration and components shall comply with MSS and FEDSPEC Type 28. Anvil Fig. 292, Carpenter & Patterson Fig. 297, or equal.

5. Type E - Framing Channel Post Base: Post bases shall be carbon steel, of standard design manufactured by framing channel manufacturer. Single channel: Unistrut P2072A, B-Line B280, or equal. Double channel: Unistrut P2073A, B-Line B281, or equal.

6. Type F - Welded Beam Attachment: Beam attachment shall be carbon steel and comply with MSS and FEDSPEC Type 22. B-Line B3083, Anvil Fig. 66, or equal.

7. Type G - Welded Steel Bracket: Bracket shall be carbon steel and comply with MSS Type 32 and FEDSPEC Type 33 for medium welded bracket. Heavy welded bracket shall comply with MSS Type 33 and FEDSPEC Type 34.

8. Type H – Cast Iron Bracket: Bracket shall be cast iron, Carpenter & Patterson Fig.

340, or equal.

9. Type J - Adjustable Beam Attachment: Beam attachment shall be carbon steel, Carpenter & Patterson Fig. 151, B-Line B3082, or equal.

10. Type K - Double Channel Bracket: Wall channel shall be single channel framing channel as specified in Paragraph 15096-2.2 E.5. Cantilever bracket shall be a carbon steel double framing channel assembly, Unistrut P2542 through P2546, B- Line B297-12 through B297-36, or equal.

11. Type L - Single Channel Bracket: Wall channel shall be single channel framing channel as specified in Paragraph 15096-2.2 E.5. Cantilever bracket shall be a carbon steel single framing channel assembly, Unistrut P2231 through P2234, B- Line B198-6, B198-12, B196-18 and B196-24, or equal.

12. Type M - Wall Mounted Channel: Wall channel shall be single channel framing channel as specified in Paragraph 15096-2.2 E.5.

13. Type N - Pipe Stanchion Floor Attachment: Baseplate shall be carbon steel with

1/2 inch minimum thickness. Anchor bolt holes shall be 1/16 inch larger than the anchor bolt diameter. The space between the baseplate and the floor shall be filled with nonshrink grout.

E. Accessories

1. Hanger Rods: Rods shall be carbon steel, threaded on both ends or continuous threaded and sized as specified.

2. Weldless Eye Nut: Eye nut shall be forged steel and shall comply with MSS and

FEDSPEC Type 17. Eye nut shall be Anvil Fig. 290, B-Line B3200, or equal.

3. Welded Eye Rod: Eye rod shall be carbon steel with eye welded closed. Inside diameter of eye shall accommodate a bolt diameter 1/8 inch larger than the rod diameter. Eye rod shall be Anvil Fig. 278, B-Line B3211, or equal.

4. Turnbuckle: Turnbuckle shall be forged steel and shall comply with MSS and

FEDSPEC Type 13. Turnbuckle shall be Anvil Fig. 230, B-Line B3202, or equal.

5. Framing Channel: Framing channel shall be 1 5/8 inches square, roll formed, 12- gage carbon steel. Channel shall have a continuous slot along one side with in- turned clamping ridges. Single channel: Unistrut P1000, B-Line B22, or equal. Double channel: Unistrut P1001, B-Line B22A, or equal. Triple channel: Unistrut P1004A, B-Line B22X, or equal.

2.3 THERMAL PIPE HANGER SHIELD

Thermal shields shall be provided at hanger, support and guide locations on pipe requiring insulation. The shield shall consist of an insulation layer encircling the entire circumference of the pipe and a steel jacket encircling the insulation layer. The thermal shield shall be the same thickness as the piping system insulation specified in Section 15250. The standard shield shall be used for hot systems and the vapor barrier shield shall be used for cold systems. Stainless steel band clamps shall be used where specified to ensure against slippage between the pipe wall and the thermal shield.

A. Standard Shield

1. Insulation

a. Hydrous calcium silicate, high density, waterproof b. Compressive strength: 100 psi average

c. Flexural strength: 75 psi average

d. K factor: 0.38 at 100 degrees F mean

e. Temperature range: 20 degrees F to 500 degrees F

2. Steel Jacket: Galvanized steel. Gage shall be the manufacturer's standard supplied for the given pipe size.

3. Connection: Shield shall have butt connection to pipe insulation. Steel jacket and insulation shall be flush with end.

B. Vapor Barrier Shield

1. Insulation

a. Hydrous calcium silicate, high density, waterproof. b. Compressive strength: 100 psi average.

c. Flexural strength: 75 psi average.

d. K factor: 0.38 at 100 degrees F mean.

e. Temperature range: 20 degrees F to 500 degrees F.

2. Steel Jacket: Galvanized steel. Gage shall be the manufacturer's standard supplied for the given pipe size.

3. Connection: Shield shall have butt connection to pipe insulation. Insulation shall extend 1 inch each side of steel jacket for vapor tight connection to pipe insulation vapor barrier.

2.4 PRODUCT DATA

A. Hanger and support locations and components shall be indicated on the piping layout drawings required by Paragraph 15050-2.4.

PART 3 - EXECUTION

3.1 HANGER AND SUPPORT LOCATIONS

A. The Contractor is cautioned that the drawings generally show the type of pipe supports and hangers required and do show all of the hangars and supports required. The Contractor is cautioned that additional hangers and supports will be required to properly support the piping systems in accordance with applicable sections of the Specifications and drawings.

B. The Contractor shall locate hangers and supports as near as possible to concentrated loads such as valves, flanges, etc. Locate hangers, supports and accessories within the maximum span lengths specified in the Contract Documents to support continuous pipeline runs unaffected by concentrated loads.

C. At least one hanger or support shall be located within 2 feet from a pipe change in direction. D. The Contractor shall locate hangers and supports to ensure that connections to equipment,

tanks, etc., are substantially free from loads transmitted by the piping.

E. Where piping is connected to equipment, a valve, piping assembly, etc. that will require removal for maintenance, the piping shall be supported in such a manner that temporary supports shall not be necessary for this procedure.

F. Pipe shall not have pockets formed in the span due to sagging of the pipe between supports caused by the weight of the pipe, medium in the pipe, insulation, valves and fittings.

3.2 INSTALLATION

A. Welded and bolted attachments to the building structural steel shall be in accordance with the requirements of the AISC Manual of Steel Construction. Unless otherwise specified, there shall be no drilling or burning of holes in the building structural steel.

B. Hanger components shall not be used for purposes other than for which they were designed. They shall not be used for rigging and erection purposes.

C. The Contractor shall install items to be embedded before concrete is poured. Fasten embedded items securely to prevent movement when concrete is poured.

D. Embedded anchor bolts shall be used instead of concrete inserts for support installations in areas below water surface or normally subject to submerging.

E. The Contractor shall install thermal pipe hanger shields on insulated piping at required locations during hanger and support installation. Butt joint connections to pipe insulation shall be made at the time of insulation installation in accordance with the manufacturer's recommendations.

F. Hanger and support components in contact with plastic pipe shall be free of burrs and sharp edges.

G. Rollers shall roll freely without binding.

H. Finished floor beneath Type N structural attachments and framing channel post bases shall be roughed prior to grouting. Grout between base plate and floor shall be free of voids and foreign material.

I. Baseplates shall be cut and drilled to specified dimensions prior to welding stanchions or other attachments and prior to setting anchor bolts.

J. Plastic or rubber end caps shall be provided at the exposed ends of all framing channels that are located up to 7 feet above the floor.

3.3 ADJUSTMENTS

A. The Contractor shall adjust hangers and supports to obtain required pipe slope and elevation. Shims made of material that is compatible with the piping material may be used. Stanchions shall be adjusted prior to grouting their baseplates.

END OF SECTION