SECTION 15405 PLUMBING HANGERS AND SUPPORTS

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.


SECTION 15405  PLUMBING HANGERS AND SUPPORTS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes hangers and supports for plumbing system piping and equipment.

1.2 DEFINITIONS

A. MSS: Manufacturers Standardization Society for the Valve and Fittings Industry.

B. Terminology:  As defined in MSS SP-90, "Guidelines on Terminology for Pipe Hang- ers and Supports."

1.3 PERFORMANCE REQUIREMENTS

A. Design channel support systems for piping to support multiple pipes capable of sup- porting combined weight of supported systems, system contents, and test water.

B. Design heavy-duty steel trapezes for piping to support multiple pipes capable of sup- porting combined weight of supported systems, system contents, and test water.

1.4 QUALITY ASSURANCE

A. Welding:   Qualify processes and operators according to ASME Boiler and Pressure Vessel Code:  Section IX, "Welding and Brazing Qualifications."


PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers:  Subject to compliance with requirements, provide products by one of the following:

1. B-Line Systems, Inc.

2. Globe Pipe Hanger Products, Inc.

3. Grinnell Corp.

4. GS Metals Corp.

5. National Pipe Hanger Corp.

2.2 MANUFACTURED UNITS

A. General: All Supports and Hangers used in General locations shall be Galvanized.

B. Pipe Hangers, Supports, and Components: MSS SP-58, factory-fabricated components. Refer to "Hanger and Support Applications" Article in Part 3 for where to use specific hanger and support types.

1. Galvanized, Metallic Coatings:  For all general locations.

2. Nonmetallic Coatings:  On attachments for electrolytic protection where attach- ments are in direct contact with copper tubing.

3. Stainless Steel: For piping and equipment that is located in corrosive areas.

C. Channel Support Systems: MFMA-2, factory-fabricated components for field assem- bly.

1. Coatings:  Galvanized.

2. Nonmetallic Coatings:  On attachments for electrolytic protection where attach- ments are in direct contact with copper tubing.

3. Stainless Steel: For piping and equipment that is located in corrosive areas.

D. Thermal-Hanger Shield Inserts: 100-psi (690-kPa) minimum compressive-strength in- sulation, encased in sheet metal shield.

1. Material: ASTM C 552,   Type I   cellular   glass   or   water-repellent-treated, ASTM C 533, Type I calcium silicate with vapor barrier.

2. For Trapeze or Clamped System:  Insert and shield cover entire circumference of pipe.

3. For Clevis or Band Hanger: Insert and shield cover lower 180 degrees of pipe.

4. Insert Length:   Extend 2 inches (50 mm) beyond sheet metal shield for piping operating below ambient air temperature.

2.3 MISCELLANEOUS MATERIALS

A. Structural Steel:  ASTM A 36/A 36M, steel plates, shapes, and bars, galvanized.


PART 3 - EXECUTION

3.1 HANGER AND SUPPORT APPLICATIONS

A. Specific hanger requirements are specified in Sections specifying equipment and sys- tems.

B. Comply with MSS SP-69 for pipe hanger selections and applications that are not speci- fied in piping system Specification Sections.

C. Horizontal-Piping Hangers and Supports:   Unless otherwise indicated and except as specified in piping system Specification Sections, install the following types:

1. Adjustable Steel Clevis Hangers (MSS Type 1): For suspension of uninsulated or insulated stationary pipes, NPS 1/2 to NPS 30 (DN15 to DN750).

2. Carbon- or Alloy-Steel, Double-Bolt Pipe Clamps (MSS Type 3): For suspen- sion of pipes, NPS 3/4 to NPS 24 (DN20 to DN600), requiring clamp flexibility and up to 4 inches (100 mm) of insulation.

3. Steel Pipe Clamps (MSS Type 4): For suspension of cold and hot pipes, NPS 1/2 to NPS 24 (DN15 to DN600), if little or no insulation is required.

4. Adjustable Steel Band Hangers (MSS Type 7): For suspension of uninsulated stationary pipes, NPS 1/2 to NPS 8 (DN15 to DN200).

5. Adjustable Swivel-Ring Band Hangers (MSS Type 10): For suspension of unin- sulated stationary pipes, NPS 1/2 to NPS 2 (DN15 to DN50).

6. Split  Pipe-Ring  with  or  without  Turnbuckle-Adjustment  Hangers  (MSS Type 11): For suspension of uninsulated stationary pipes, NPS 3/8 to NPS 8 (DN10 to DN200).

7. U-Bolts (MSS Type 24): For support of heavy pipe, NPS 1/2 to NPS 30 (DN15 to DN750).

8. Clips (MSS Type 26): For support of insulated pipes not subject to expansion or contraction.

D. Vertical-Piping Clamps:  Unless otherwise indicated and except as specified in piping system Specification Sections, install the following types:

1. Extension Pipe or Riser Clamps (MSS Type 8): For support of pipe risers, NPS 3/4 to NPS 20 (DN20 to DN500).

E. Hanger-Rod Attachments:  Unless otherwise indicated and except as specified in piping system Specification Sections, install the following types:

1. Steel Turnbuckles (MSS Type 13): For adjustment up to 6 inches (150 mm) for heavy loads.

2. Steel Clevises (MSS Type 14): For 120 to 450 deg F (49 to 232 deg C) piping installations.

3. Swivel Turnbuckles (MSS Type 15): For use with MSS Type 11, split pipe rings.

4. Malleable-Iron Sockets (MSS Type 16):   For attaching hanger rods to various types of building attachments.

5. Steel  Weldless  Eye  Nuts  (MSS  Type 17): For  120  to  450  deg F  (49  to 232 deg C) piping installations.

F. Building Attachments:   Unless otherwise indicated and except as specified in piping system Specification Sections, install the following types:

1. Top-Beam C-Clamps (MSS Type 19):  For use under roof installations with bar- joist construction to attach to top flange of structural shape.

2. Side-Beam or Channel Clamps (MSS Type 20):  For attaching to bottom flange of beams, channels, or angles.

3. Center-Beam Clamps (MSS Type 21):  For attaching to center of bottom flange of beams.

4. C-Clamps (MSS Type 23): For structural shapes.

5. Top-Beam Clamps (MSS Type 25):  For top of beams if hanger rod is required tangent to flange edge.

6. Side-Beam Clamps (MSS Type 27):  For bottom of steel I-beams.

7. Welded-Steel Brackets:  For support of pipes from below or for suspending from above by using clip and rod. Use one of the following for indicated loads:

a. Light (MSS Type 31): 750 lb (340 kg).
b. Medium (MSS Type 32): 1500 lb (675 kg).
c. Heavy (MSS Type 33): 3000 lb (1350 kg).

8. Side-Beam Brackets (MSS Type 34):  For sides of steel or wooden beams.

G. Saddles and Shields:  Unless otherwise indicated and except as specified in piping sys- tem Specification Sections, install the following types:

1. Protection Shields (MSS Type 40):  Of length recommended by manufacturer to prevent crushing insulation.

2. Thermal-Hanger Shield Inserts: For supporting insulated pipe, 360-degree insert of high-density, 100-psi (690-kPa) minimum compressive-strength, water- repellent-treated calcium silicate or cellular-glass pipe insulation, same thickness as adjoining insulation with vapor barrier and encased in 360-degree sheet metal shield.

3.2 HANGER AND SUPPORT INSTALLATION

A. Pipe Hanger and Support Installation: Comply with MSS SP-69 and MSS SP-89. In- stall hangers, supports, clamps, and attachments as required to properly support piping from building structure.

B. Channel Support System Installation: Arrange for grouping of parallel runs of piping and support together on field-assembled channel systems.

1. Field assemble and install according to manufacturer's written instructions.

C. Heavy-Duty Steel Trapeze Installation: Arrange for grouping of parallel runs of hori- zontal piping and support together on field-fabricated, heavy-duty trapezes.

1. Pipes of Various Sizes: Support together and space trapezes for smallest pipe size or install intermediate supports for smaller diameter pipes as specified above for individual pipe hangers.

2. Field fabricate from ASTM A 36/A 36M, steel shapes selected for loads being supported.  Weld steel according to AWS D-1.1.

D. Install building attachments within concrete slabs or attach to structural steel. Space at- tachments within maximum piping span length indicated in MSS SP-69. Install addi- tional attachments at concentrated loads, including valves, flanges, guides, strainers, and expansion joints, and at changes in direction of piping. Install concrete inserts be- fore concrete is placed; fasten inserts to forms and install reinforcing bars through openings at top of inserts.

E. Install mechanical-anchor fasteners in concrete after concrete is placed and completely cured. Install fasteners according to manufacturer's written instructions.

F. Install hangers and supports complete with necessary inserts, bolts, rods, nuts, washers, and other accessories.

G. Install hangers and supports to allow controlled thermal movement of piping systems, to permit freedom of movement between pipe anchors, and to facilitate action of ex- pansion joints, expansion loops, expansion bends, and similar units.

H. Load Distribution: Install hangers and supports so that piping live and dead loads and stresses from movement will not be transmitted to connected equipment.

I. Pipe Slopes: Install hangers and supports to provide indicated pipe slopes and so max- imum pipe deflections allowed by ASME B31.9, "Building Services Piping," is not ex- ceeded.

J. Insulated Piping:  Comply with the following:

1. Attach clamps and spacers to piping.

a. Piping Operating above Ambient Air Temperature:   Clamp may project through insulation.

b. Piping Operating below Ambient Air Temperature: Use thermal-hanger shield insert with clamp sized to match OD of insert.
c. Do not exceed pipe stress limits according to ASME B31.9.

2. Install MSS SP-58, Type 39 protection saddles, if insulation without vapor barri- er is indicated. Fill interior voids with insulation that matches adjoining insula- tion.

a. Option: Thermal-hanger shield inserts may be used. Include steel weight- distribution plate for pipe NPS 4 (DN100) and larger if pipe is installed on rollers.

3. Install MSS SP-58, Type 40 protective shields on cold piping with vapor barrier. Shields shall span arc of 180 degrees.

a. Option: Thermal-hanger shield inserts may be used. Include steel weight- distribution plate for pipe NPS 4 (DN100) and larger if pipe is installed on rollers.

4. Shield Dimensions for Pipe:  Not less than the following:

a. NPS 1/4 to NPS 3-1/2 (DN8 to DN90):   12 inches (305 mm) long and
0.048 inch (1.22 mm) thick.

5. Insert Material: Length at least as long as protective shield.

6. Thermal-Hanger Shields: Install with insulation same thickness as piping insula- tion.

3.3 EQUIPMENT SUPPORTS

A. Fabricate structural-steel stands to suspend equipment from structure above or to sup- port equipment above floor.

B. Grouting:  Place grout under supports for equipment and make smooth bearing surface.

3.4 METAL FABRICATION

A. Cut, drill, and fit miscellaneous metal fabrications for heavy-duty steel trapezes and equipment supports.

B. Fit exposed connections together to form hairline joints. Field-weld connections that cannot be shop-welded because of shipping size limitations.

C. Field Welding: Comply with AWS D1.1 procedures for shielded metal arc welding, appearance and quality of welds, and methods used in correcting welding work, and with the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

4. Finish welds at exposed connections so no roughness shows after finishing and contours of welded surfaces match adjacent contours.

3.5 ADJUSTING

A. Hanger Adjustment:  Adjust hangers to distribute loads equally on attachments and to achieve indicated slope of pipe.

3.6 PAINTING

A. Galvanized Surfaces:  Clean welds, bolted connections, and abraded areas and apply galvanizing-repair paint to comply with ASTM A 780.


END OF SECTION