Chrysler LLCConstruction Standards

REVISED 12/4/06

SECTION 15181 - HYDRONIC PIPING

PART 1 - GENERAL

1.1SUMMARY

  1. This Section includes piping, special-duty valves, and hydronic specialties for hot-water heating, chilled-water cooling, condenser water systems, and process non-potable water systems; makeup water for these systems; blow-down drain lines; and condensate drain piping.
  2. Related Sections include the following:
  3. Division7 Section "Through-Penetration Fire-stop Systems" for materials and methods for sealing pipe penetrations through fire and smoke barriers.
  4. Division7 Section "Joint Sealants" for materials and methods for sealing pipe penetrations through exterior walls.
  5. Division15 Section "Basic Mechanical Materials and Methods" for general piping materials and installation requirements.
  6. Division15 Section "Hangers and Supports" for pipe supports, product descriptions, and installation requirements. Hanger and support spacing is specified in this Section.
  7. Division15 Section "Valves" for general-duty gate, globe, ball, butterfly, and check valves.
  8. Division15 Section "Meters and Gages" for thermometers, flow meters, and pressure gages.

1.2SUBMITTALS

  1. Product Data: For each type of special-duty valve indicated. Include flow and pressure drop curves based on manufacturer's testing for diverting fittings, calibrated balancing valves, and automatic flow-control valves.
  2. Shop Drawings: Detail fabrication of pipe anchors, hangers, special pipe support assemblies, alignment guides, expansion joints and loops, and their attachment to the building structure. Detail location of anchors, alignment guides, and expansion joints and loops.
  3. Welding Certificates: Copies of certificates for welding procedures and personnel.
  4. Field Test Reports: Written reports of tests specified in Part3 of this Section. Include the following:
  5. Test procedures used.
  6. Test results that comply with requirements.
  7. Failed test results and corrective action taken to achieve requirements.
  8. Maintenance Data: For hydronic specialties and special-duty valves to include in maintenance manuals.

1.3QUALITY ASSURANCE

  1. Welding: Qualify processes and operators according to the ASME Boiler and Pressure Vessel Code: SectionIX, "Welding and Brazing Qualifications."
  2. ASME Compliance: Comply with ASMEB31.9, "Building Services Piping," for materials, products, and installation. Safety valves and pressure vessels shall bear the appropriate ASME label. Fabricate and stamp air separators and expansion tanks to comply with the ASME Boiler and Pressure Vessel Code, SectionVIII, Division1.

1.4COORDINATION

  1. Coordinate layout and installation of hydronic piping and suspension system components with other construction, including light fixtures, HVAC equipment, fire-suppression-system components, and partition assemblies.
  2. Coordinate pipe sleeve installations for foundation wall penetrations.
  3. Coordinate pipe fitting pressure classes with products specified in related Sections.
  4. Coordinate installation of pipe sleeves for penetrations through exterior walls and floor assemblies. Coordinate with requirements for fire-stopping specified in Division7 Section "Through-Penetration Fire-stop Systems" for fire and smoke wall and floor assemblies.

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. Grooved Mechanical-Joint Fittings and Couplings:
  3. Central Sprinkler Company; Central Grooved Piping Products.
  4. Grinnell Corporation.
  5. Victaulic Company of America.
  6. Calibrated Balancing Valves:
  7. Armstrong Pumps, Inc.
  8. Flow Design, Inc.
  9. Gerand Engineering Company.
  10. Griswold Controls.
  11. ITT Bell & Gossett; ITT Fluid Technology Corp.
  12. Taco, Inc.
  13. Victaulic Company of America.
  14. Safety Valves:
  15. Amtrol, Inc.
  16. Armstrong Pumps, Inc.
  17. Conbraco Industries, Inc.
  18. ITT McDonnell & Miller Div.; ITT Fluid Technology Corp.
  19. Kunkle Valve Division.
  20. Spence Engineering Company, Inc.
  21. Expansion Tanks:
  22. Amtrol, Inc.
  23. Armstrong Pumps, Inc.
  24. ITT Bell & Gossett; ITT Fluid Technology Corp.
  25. Taco, Inc.
  26. Air Separators:
  27. Amtrol, Inc.
  28. Armstrong Pumps, Inc.
  29. ITT Bell & Gossett; ITT Fluid Technology Corp.
  30. Taco, Inc.

2.2PIPING MATERIALS

  1. General: Refer to Part3 "Piping Applications" Article for applications of pipe and fitting materials.

2.3COPPER TUBE AND FITTINGS

  1. Drawn-Temper Copper Tubing: ASTMB88, TypeL.
  2. Annealed-Temper Copper Tubing: ASTMB88, TypeK
  3. Wrought-Copper Fittings: ASMEB16.22.
  4. Wrought-Copper Unions: ASMEB16.22.
  5. Solder Filler Metals: ASTMB32, 95-5 tin antimony.
  6. Brazing Filler Metals: AWSA5.8, Classification BAg-1 (silver).

2.4STEEL PIPE AND FITTINGS

  1. Steel Pipe, NPS2 inches and Smaller: ASTMA53, TypeS (seamless) or TypeF (furnace-butt welded), GradeA, Schedule40, black steel, plain ends.
  2. Steel Pipe, NPS2-1/2 through NPS12: ASTMA53, TypeE (electric-resistance welded), GradeA, Schedule40, black steel, plain ends.
  3. Steel Pipe, NPS14 through NPS18: ASTM A53, TypeE (electric-resistance welded) or TypeS (seamless), GradeB, Schedule30, black steel, plain ends.
  4. Steel Pipe Nipples: ASTMA733, made of ASTMA53, Schedule40, black steel; seamless for NPS2and smaller and electric-resistance welded for NPS2-1/2and larger.
  5. Cast-Iron Threaded Fittings: ASMEB16.4; Classes125 and 250.
  6. Malleable-Iron Threaded Fittings: ASMEB16.3, Classes150 and 300.
  7. Malleable-Iron Unions: ASMEB16.39; Classes150, 250, and 300.
  8. Cast-Iron Pipe Flanges and Flanged Fittings: ASMEB16.1, Classes25, 125, and 250; raised ground face, and bolt holes spot faced.
  9. Wrought-Steel Fittings: ASTMA234/A234M, wall thickness to match adjoining pipe.
  10. Wrought Cast- and Forged-Steel Flanges and Flanged Fittings: ASMEB16.5, including bolts, nuts, and gaskets of the following material group, end connections, and facings:
  11. Material Group: 1.1.
  12. End Connections: Butt welding.
  13. Facings: Raised face.
  14. Grooved Mechanical-Joint Fittings: ASTMA536, Grade65-45-12 ductile iron; ASTMA47, Grade32510 malleable iron; ASTMA53, TypeF, E, or S, GradeB fabricated steel; or ASTMA106, GradeB steel fittings with grooves or shoulders designed to accept grooved end couplings.
  15. Grooved Mechanical-Joint Couplings: Ductile- or malleable-iron housing and synthetic rubber gasket of central cavity pressure-responsive design; with nuts, bolts, locking pin, locking toggle, or lugs to secure grooved pipe and fittings.
  16. Flexible Connectors: Stainless-steel bellows with woven, flexible, bronze, wire-reinforcing protective jacket; 150-psig minimum working pressure and 250 degF maximum operating temperature. Connectors shall have flanged or threaded-end connections to match equipment connected and shall be capable of 3/4-inch misalignment.
  17. Packed, Slip, Expansion Joints: 150-psigminimum working pressure, steel pipe fitting consisting of telescoping body and slip-pipe sections, packing ring, packing, limit rods, flanged ends, and chrome-plated finish on slip-pipe telescoping section.
  18. Welding Materials: Comply with SectionII, PartC, of the ASME Boiler and Pressure Vessel Code for welding materials appropriate for wall thickness and for chemical analysis of pipe being welded.
  19. Gasket Material: Thickness, material, and type suitable for fluid to be handled; and design temperatures and pressures.

2.5VALVES

  1. Gate, globe, check, ball, and butterfly valves are specified in Division15 Section "Valves."
  2. Refer to Part3 "Valve Applications" Article for applications of each valve.
  3. Calibrated Balancing Valves, NPS2and Smaller: Bronze body, ball type, 125-psig working pressure, 250 degF maximum operating temperature, and having threaded ends. Valves shall have calibrated orifice or venturi, connections for portable differential pressure meter with integral seals, and be equipped with a memory stop to retain set position.
  4. Calibrated Balancing Valves, NPS2-1/2 and Larger: Cast-iron or steel body, ball type, 125-psig working pressure, 250 degF maximum operating temperature, and having flanged or grooved connections. Valves shall have calibrated orifice or venturi, connections for portable differential pressure meter with integral seals, and be equipped with a memory stop to retain set position.
  5. Safety Valves: Diaphragm-operated, bronze or brass body with brass and rubber, wetted, internal working parts; shall suit system pressure and heat capacity and shall comply with the ASME Boiler and Pressure Vessel Code, SectionIV.

2.6HYDRONIC SPECIALTIES

  1. Manual Air Vent: Bronze body and nonferrous internal parts; 150-psig working pressure; 225 degF operating temperature; manually operated with screwdriver or thumbscrew; with NPS1/8discharge connection and NPS1/2 inlet connection.
  2. Automatic Air Vent: Designed to vent automatically with float principle; bronze body and nonferrous internal parts; 150-psig working pressure; 240 degF operating temperature; with NPS1/4 discharge connection and NPS1/2 inlet connection.
  3. Expansion Tanks: Welded carbon steel, rated for 125-psig working pressure and 375degF maximum operating temperature, with taps in bottom of tank for tank fitting and taps in end of tank for gage glass. Tanks shall be factory tested with taps fabricated and labeled according to the ASME Boiler and Pressure Vessel Code, SectionVIII, Division1. Include the following fittings and accessories:
  4. Air-Control Tank Fitting: Cast-iron body, copper-plated tube, brass vent tube plug, and stainless-steel ball check, 100-gal.unit only; sized for compression-tank diameter. Design tank fittings for 125-psigworking pressure and 250 degF maximum operating temperature.
  5. Tank Drain Fitting: Brass body, nonferrous internal parts; 125-psig working pressure and 240 degF maximum operating temperature; designed to admit air to compression tank, drain water, and close off system.
  6. Gage Glass: Full height with dual manual shutoff valves, 3/4-inch-diameter gage glass, and slotted-metal glass guard.
  7. Expansion Tanks: Welded carbon steel, rated for 125-psig working pressure and 375 degF maximum operating temperature. Separate air charge from system water to maintain design expansion capacity by a flexible diaphragm securely sealed into tank. Include drain fitting and taps for pressure gage and air-charging fitting. Support vertical tanks with steel legs or base. Factory fabricate support horizontal tanks with steel saddles. Factory fabricate and test tank with taps and supports installed and labeled according to the ASME Boiler and Pressure Vessel Code, SectionVIII, Division1.
  8. Tangential-Type Air Separators: Welded black steel; ASME constructed and labeled for 125-psig minimum working pressure and 375 degFmaximum operating temperature; perforated stainless-steel air collector tube designed to direct released air into expansion tank; tangential inlet and outlet connections; threaded connections for NPS2and smaller; flanged connections for NPS2-1/2and larger; threaded blowdown connection. Provide units in sizes for full-system flow capacity.
  9. Y-Pattern Strainers: 125-psigworking pressure; cast-iron body (ASTMA126, ClassB), flanged ends for NPS2-1/2and larger, threaded connections for NPS2and smaller, bolted cover, perforated stainless-steel basket, and bottom drain connection.
  10. Flexible Connectors: Stainless-steel bellows with woven, flexible, bronze, wire-reinforcing protective jacket; 150-psigminimum working pressure and 250 degFmaximum operating temperature. Connectors shall have flanged- or threaded-end connections to match equipment connected and shall be capable of 3/4-inchmisalignment.
  11. Packed, Slip, Expansion Joints: 150-psig minimum working pressure, steel pipe fitting consisting of telescoping body and slip-pipe sections, packing ring, packing, limit rods, flanged ends, and chrome-plated finish on slip-pipe telescoping section.

PART 3 - EXECUTION

3.1PREPARATION

A.Do not interrupt Piping System service to facilities occupied by Owner or others unless permitted and authorized by the Owners representative.

  1. Notify Owner not less than seven days in advance of proposed interruption.

3.2PIPING APPLICATIONS

A.Hot and Chilled Water, NPS 2 1/2and Smaller: Aboveground, use TypeL drawn-temper copper tubing with soldered joints. Belowground or within slabs, use TypeK annealed-temper copper tubing with soldered joints. Use the fewest possible joints belowground and within floor slabs.

B.Hot and Chilled Water, NPS 3and Larger: Schedule40 steel pipe with screwed joints, welded and flanged jointsor grooved mechanical-joint couplings.

  1. Weld Water, NPS 3 and Larger: Schedule40 steel pipe welded and flanged joints or with grooved mechanical joint couplings.
  2. Condenser and Process, CoolingTower and Non-potable Water, NPS 2 and Smaller: Aboveground, use TypeL drawn-temper copper tubing with soldered joints. Belowground or within slabs, use TypeK annealed-temper copper tubing with brazed joints.
  3. Condenser and Process, CoolingTower and Non-potable Water, NPS 2-1/2 and Larger: Schedule40 steel pipe with welded and flanged joints or grooved mechanical-joint couplings.
  4. Condensate Drain Lines: TypeL drawn-temper copper tubing with soldered joints or Schedule40, PVC pipe with solvent-welded joints.

3.2VALVE APPLICATIONS

  1. General-Duty Valve Applications: Unless otherwise indicated, use the following valve types:
  2. Shutoff Duty: Gate, ball, and butterfly valves.
  3. Throttling Duty: Globe, ball, and butterfly valves.
  4. Install shutoff duty valves at each branch connection to supply mains, at supply connection to each piece of equipment, unless only one piece of equipment is connected in the branch line. Install throttling duty valves at each branch connection to return mains, at return connections to each piece of equipment, and elsewhere as indicated.
  5. Install calibrated balancing valves where indicated, or as in the return water line of each heating or cooling element and elsewhere indicated, or as required to facilitate system balancing.
  6. Install check valves at each pump discharge and elsewhere as required to control flow direction.
  7. Install safety valves as required by the ASME on hot-water generators and elsewhere as required by the ASME Boiler and Pressure Vessel Code. Install safety-valve discharge piping, without valves, to floor. Comply with the ASME Boiler and Pressure Vessel Code, SectionVIII, Division1, for installation requirements.

3.3PIPING INSTALLATIONS

  1. Refer to Division15 Section "Basic Mechanical Materials and Methods" for basic piping installation requirements.
  2. Install groups of pipes parallel to each other, spaced to permit applying insulation and servicing of valves.
  3. Install drains and air vents consisting of a tee fitting, NPS3/4 ball valve, and short NPS3/4 threaded nipple with cap, at low points for drains and high points for vents in piping system mains, branches and headers. All mains, branches and headers shall be installed to be independently drained.
  4. Install piping at a uniform grade of 0.2 percent upward in direction of flow.
  5. Reduce pipe sizes using eccentric reducer fitting installed with level side up.
  6. Unless otherwise indicated, install branch connections to mains using tee fittings in main pipe, with the takeoff coming out the bottom of the main pipe. For up-feed risers, install the takeoff coming out the top of the main pipe.
  7. Install strainers as indicated on the Drawings. Install NPS3/4 nipple and ball valve in blowdown connection of strainers NPS2 and larger. Match size of strainer blowoff connection for strainers smaller than NPS2.
  8. Anchor piping for proper direction of expansion and contraction.
  9. Where possible use engineered expansion loops in lieu of mechanical type expansion joints.
  1. Pipe anchoring must follow the requirements of the Architectural/Engineering firm, under all circumstances. Avoid placing hydronic piping below floors in Powertrain Plants.

3.4HANGERS AND SUPPORTS

  1. Hanger, support, and anchor devices are specified in Division15 Section "Hangers and Supports." Comply with requirements below for maximum spacing of supports.
  2. Install the following pipe attachments:
  3. Adjustable steel clevis hangers for individual horizontal piping.
  4. Spring hangers to support vertical runs.
  5. Install hangers for steel piping with the following maximum spacing and minimum rod sizes:
  6. NPS3/4: Maximum span, 7 feet, minimum rod size, 1/4 inch
  7. NPS1: Maximum span, 7 feet; minimum rod size, 1/4 inch
  8. NPS1-1/2: Maximum span, 9 feet; minimum rod size, 3/8 inch
  9. NPS2: Maximum span, 10 feet; minimum rod size, 3/8 inch
  10. NPS2-1/2: Maximum span, 11 feet; minimum rod size, 3/8 inch
  11. NPS3: Maximum span, 12 feet; minimum rod size, 3/8 inch
  12. NPS4: Maximum span, 14 feet; minimum rod size, 1/2 inch
  13. NPS6: Maximum span, 17 feet; minimum rod size, 1/2 inch
  14. NPS8: Maximum span, 19 feet; minimum rod size, 5/8 inch
  15. NPS10: Maximum span, 20 feet; minimum rod size, 3/4 inch
  16. NPS12: Maximum span, 23 feet, minimum rod size, 7/8 inch
  17. NPS14: Maximum span, 25 feet; minimum rod size, 1 inch
  18. NPS16: Maximum span, 27 feet; minimum rod size, 1 inch
  19. NPS18: Maximum span, 28 feet; minimum rod size, 1-1/4 inches
  20. Install hangers for drawn-temper copper piping with the following maximum spacing and minimum rod sizes:
  21. NPS3/4: Maximum span, 5 feet; minimum rod size, 1/4 inch
  22. NPS1: Maximum span, 6 feet; minimum rod size, 1/4 inch
  23. NPS1-1/2: Maximum span, 8 feet; minimum rod size, 3/8 inch
  24. NPS2: Maximum span, 8 feet; minimum rod size, 3/8 inch
  25. NPS2-1/2: Maximum span, 9 feet; minimum rod size, 3/8 inch
  26. NPS3: Maximum span, 10 feet; minimum rod size, 3/8 inch
  27. Support vertical runs at roof, at each floor, and at 10-foot intervals between floors.

Install hangers for PVC low temperature condensate drains with the following maximum spacing:

1.1-1/4- to 2-Inch NPS Maximum horizontal spacing, 48 inches with 3/8-inch minimum rod diameter; maximum vertical spacing, 48inches

2.4- NPS Maximum horizontal spacing, 48 inches with 5/8-inch minimum rod diameter; maximum vertical spacing, 48inches

3.5PIPE JOINT CONSTRUCTION

  1. Refer to Division15 Section "Basic Mechanical Materials and Methods" for joint construction requirements for soldered and brazed joints in copper tubing; threaded, welded, and flanged joints in steel piping.
  2. B.Grooved Joints: Assemble joints in accordance to manufacturers written instruction. Grooved piping and couplings to be clean and free of defects. The use of Silicone in prohibitive in all components and lubrication.

1. All grooved couplings, fittings, valves and other specialties shall be products of a single manufacturer.

2. A factory trained representative from the grooved product manufacturer shall provide on site training to the contractors personnel to ensure proper installation and assembly.

3.6HYDRONIC SPECIALTIES INSTALLATION

  1. Install manual air vents at high points in piping, at heat-transfer coils, and elsewhere as required for system air venting.
  2. Install automatic air vents in mechanical equipment rooms only at high points of system piping, and elsewhere as required for system air venting.
  3. Install piping to expansion tank with a 2 percent upward slope toward tank. Connect boiler-outlet piping.
  4. Install in-line air separators in pump suction lines. Install piping to compression tank with a 2 percent upward slope toward tank. Install drain valve on units NPS2and larger.
  5. Install combination air separator and strainer in pump suction lines. Install piping to compression tank with a 2 percent upward slope toward tank. Install blowdown piping with gate valve; extend to nearest drain.
  6. Install expansion tanks above air separator. Install gage glass and cocks on end of tank. Install tank fitting in tank bottom and charge tank. Use manual vent for initial fill to establish proper water level in tank.
  7. Support tank from floor or structure above with sufficient strength to carry weight of tank, piping connections, and fittings, plus weight of a full tank of water. Do not overload building components and structural members.
  8. Install diaphram expansion tanks on floor. Vent and purge air from hydronic system, and ensure tank is properly charged with air to suit system design requirements.

3.7TERMINAL EQUIPMENT CONNECTIONS