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HomeMy WebLinkAbout23 21 13 Hydronic PipingBEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 1 OF 7 MARCH 29, 2013 SECTION 232113 -- HYDRONIC PIPING PART 1 GENERAL 1.1 DEFINITIONS A. MSS: Manufacturer’s Standardization Society of the Valve and Fitting Industry. B. DWV: Drain, Waste and Vent C. PTFE: Polytetrafluoroethylene. 1.2 SUBMITTALS A. Product Data: Provide for each type of the following: 1. Copper Pipe 2. Steel Pipe 1.3 QUALITY ASSURANCE A. Installer Qualifications: 1. Installers of Pressure-Sealed Joints: Installers shall be certified by the pressure-seal joint manufacturer as having been trained and qualified to join piping with pressure-seal pipe couplings and fittings. B. Steel Support Welding: Qualify processes and operators according to AWS D1.1/D1.1M, "Structural Welding Code - Steel." C. Welding: Qualify processes and operators according to ASME Boiler and Pressure Vessel Code: Section IX. 1. Comply with provisions in ASME B31 Series, "Code for Pressure Piping." 2. Certify that each welder has passed AWS qualification tests for welding processes involved and that certification is current. PART 2 PRODUCTS 2.1 COPPER TUBE AND FITTINGS A. Drawn-Temper Copper Tubing: ASTM B 88, Type L B. Wrought-Copper Fittings: ASME B16.22. 1. Grooved-End Copper Fittings: ASTM B 75 (ASTM B 75M), copper tube or ASTM B 584, bronze casting. 2. Grooved-End-Tube Couplings: Rigid pattern, unless otherwise indicated; gasketed fitting. Ductile-iron housing with keys matching pipe and fitting grooves, prelubricated EPDM gasket rated for minimum 230 deg F (110 deg C) for use with housing, and steel bolts and nuts. C. Copper or Bronze Pressure-Seal Fittings: BEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 2 OF 7 MARCH 29, 2013 1. Housing: Copper. 2. O-Rings and Pipe Stops: EPDM. 3. Tools: Manufacturer's special tools. 4. Minimum 200-psig (1379-kPa) working-pressure rating at 250 deg F (121 deg C). D. Wrought-Copper Unions: ASME B16.22. 2.2 STEEL PIPE AND FITTINGS A. Steel Pipe: ASTM A 53/A 53M, black steel with plain ends; type, grade, and wall thickness as indicated in Part 3 "Piping Applications" Article. B. Wrought-Steel Fittings: ASTM A 234/A 234M, wall thickness to match adjoining pipe. C. Wrought Cast- and Forged-Steel Flanges and Flanged Fittings: ASME B16.5, including bolts, nuts, and gaskets of the following material group, end connections, and facings: 1. Material Group: 1.1. 2. End Connections: Butt welding. 3. Facings: Raised face. D. Steel Pipe Nipples: ASTM A 733, made of same materials and wall thicknesses as pipe in which they are installed. 2.3 JOINING MATERIALS A. Pipe-Flange Gasket Materials: Suitable for chemical and thermal conditions of piping system contents. 1. ASME B16.21, nonmetallic, flat, asbestos free, 1/8-inch (3.2-mm) maximum thickness unless thickness or specific material is indicated. a. Full-Face Type: For flat-face, Class 125, cast-iron and cast-bronze flanges. b. Narrow-Face Type: For raised-face, Class 250, cast-iron and steel flanges. B. Flange Bolts and Nuts: ASME B18.2.1, carbon steel, unless otherwise indicated. C. Solder Filler Metals: ASTM B 32, lead-free alloys. Include water-flushable flux according to ASTM B 813. D. Brazing Filler Metals: AWS A5.8, BCuP Series, copper-phosphorus alloys for joining copper with copper; or BAg-1, silver alloy for joining copper with bronze or steel. E. Welding Filler Metals: Comply with AWS D10.12/D10.12M for welding materials appropriate for wall thickness and chemical analysis of steel pipe being welded. BEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 3 OF 7 MARCH 29, 2013 F. Gasket Material: Thickness, material, and type suitable for fluid to be handled and working temperatures and pressures. 2.4 DIELECTRIC FITTINGS A. General Requirements: Assembly of copper alloy and ferrous materials with separating nonconductive insulating material. Include end connections compatible with pipes to be joined. B. Dielectric Unions: 1. Description: a. Standard: ASSE 1079. b. Pressure Rating: 150 psig (1035 kPa). c. End Connections: Solder-joint copper alloy and threaded ferrous. C. Dielectric Flanges: 1. Description: a. Standard: ASSE 1079. b. Factory-fabricated, bolted, companion-flange assembly. c. Pressure Rating: Minimum at 180 deg F (82 deg C), 150 psig (1035 kPa). d. End Connections: Solder-joint copper alloy and threaded ferrous; threaded solder-joint copper alloy and threaded ferrous. D. Dielectric-Flange Insulating Kits: 1. Description: a. Nonconducting materials for field assembly of companion flanges. b. Pressure Rating: 150 psig (1035 kPa). c. Gasket: Neoprene or phenolic. d. Bolt Sleeves: Phenolic or polyethylene. e. Washers: Phenolic with steel backing washers. E. Dielectric Nipples: 1. Description: a. Standard: IAPMO PS 66 b. Electroplated steel nipple. complying with ASTM F 1545. c. Pressure Rating: 300 psig (2070 kPa) at 225 deg F (107 deg C). d. End Connections: Male threaded or grooved. e. Lining: Inert and noncorrosive, propylene. 2.5 VALVES A. Automatic Flow-Control Valves: 1. Basis-of-Design Product: a. Flow Design Inc. b. Griswold Controls. 2. Body: Brass or ferrous metal. 3. Piston and Spring Assembly: Stainless steel, tamper proof, self cleaning, and removable. 4. Combination Assemblies: Include bonze or brass-alloy ball valve. BEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 4 OF 7 MARCH 29, 2013 5. Identification Tag: Marked with zone identification, valve number, and flow rate. 6. Size: Same as pipe in which installed. 7. Performance: Maintain constant flow, plus or minus 5 percent over system pressure fluctuations. 8. Minimum CWP Rating: 175 psig (1207 kPa). 9. Maximum Operating Temperature: 200 deg F (93 deg C). PART 3 EXECUTION 3.1 PIPING APPLICATIONS A. Chilled-water piping, aboveground, NPS 2 (DN 50) and smaller, shall be the following: 1. Type L, drawn-temper copper tubing, wrought-copper fittings, and soldered brazed or pressure-seal joints. B. Chilled-water piping, aboveground, NPS 2-1/2 (DN 65) and larger, shall be the following: 1. Schedule 40 steel pipe, wrought-steel fittings and wrought-cast or forged- steel flanges and flange fittings, and welded and flanged joints. 2. RTRP and RTRF with adhesive or flanged joints. C. Glycol cooling-water piping, aboveground, NPS 2 (DN 50) and smaller, shall be the following: 1. Type L, drawn-temper copper tubing, wrought-copper fittings, and soldered brazed or pressure-seal joints. D. Glycol cooling-water piping, aboveground, NPS 2-1/2 (DN 65) and larger, shall be the following: 1. Schedule 40 steel pipe, wrought-steel fittings and wrought-cast or forged- steel flanges and flange fittings, and welded and flanged joints. E. Condensate-Drain Piping: Type M, drawn-temper copper tubing, wrought- copper fittings, and soldered joints. 3.2 PIPING INSTALLATIONS A. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicate piping locations and arrangements if such were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved on Coordination Drawings. B. Install piping in concealed locations, unless otherwise indicated and except in equipment rooms and service areas. C. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise. BEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 5 OF 7 MARCH 29, 2013 D. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal. E. Install piping to permit valve servicing. F. Install piping at indicated slopes. G. Install piping free of sags and bends. H. Install fittings for changes in direction and branch connections. I. Install piping to allow application of insulation. J. Select system components with pressure rating equal to or greater than system operating pressure. K. Install groups of pipes parallel to each other, spaced to permit applying insulation and servicing of valves. L. Install drains, consisting of a tee fitting, NPS 3/4 (DN 20) ball valve, and short NPS 3/4 (DN 20) threaded nipple with cap, at low points in piping system mains and elsewhere as required for system drainage. M. Install piping at a uniform grade of 0.2 percent upward in direction of flow. N. Reduce pipe sizes using eccentric reducer fitting installed with level side up. O. Install branch connections to mains using mechanically formed tee fittings in main pipe, with the branch connected to the bottom of the main pipe. For up- feed risers, connect the branch to the top of the main pipe. P. Install unions in piping, NPS 2 (DN 50) and smaller, adjacent to valves, at final connections of equipment, and elsewhere as indicated. Q. Install flanges in piping, NPS 2-1/2 (DN 65) and larger, at final connections of equipment and elsewhere as indicated. 3.3 HANGERS AND SUPPORTS A. Install the following pipe attachments: 1. Adjustable steel clevis hangers for individual horizontal piping less than 20 feet (6 m) long. 2. Adjustable roller hangers and spring hangers for individual horizontal piping 20 feet (6 m) or longer. 3. Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet (6 m) or longer, supported on a trapeze. 4. Spring hangers to support vertical runs. 5. Provide copper-clad hangers and supports for hangers and supports in direct contact with copper pipe. B. Install hangers for steel piping with the following maximum spacing and minimum rod sizes: BEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 6 OF 7 MARCH 29, 2013 HANGERS MAXIMUM SPAN MINIMUM ROD SIZE NPS 2-1/2 11 feet 3/8 inch NPS 3 12 feet 3/8 inch C. Install hangers for drawn-temper copper piping with the following maximum spacing and minimum rod sizes: HANGERS MAXIMUM SPAN MINIMUM ROD SIZE NPS ¾ 5 feet ¼ inch NPS 1 6 feet ¼ inch NPS 1-1/2 8 feet 3/8 inch NPS 2 8 feet 3/8 inch 3.4 PIPE JOINT CONSTRUCTION A. Join pipe and fittings according to the following requirements and Division 23 Sections specifying piping systems. B. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe. C. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly. D. Soldered Joints: Apply ASTM B 813, water-flushable flux, unless otherwise indicated, to tube end. Construct joints according to ASTM B 828 or CDA's "Copper Tube Handbook," using lead-free solder alloy complying with ASTM B 32. E. Brazed Joints: Construct joints according to AWS's "Brazing Handbook," "Pipe and Tube" Chapter, using copper-phosphorus brazing filler metal complying with AWS A5.8. F. Threaded Joints: Thread pipe with tapered pipe threads according to ASME B1.20.1. Cut threads full and clean using sharp dies. Ream threaded pipe ends to remove burrs and restore full ID. Join pipe fittings and valves as follows: 1. Apply appropriate tape or thread compound to external pipe threads unless dry seal threading is specified. 2. Damaged Threads: Do not use pipe or pipe fittings with threads that are corroded or damaged. Do not use pipe sections that have cracked or open welds. BEARDSLEY DESIGN ASSOCIATES CORNELL – NCP HYDRONIC PIPING STANDARD SPECIFICATIONS 23 21 13 – PAGE 7 OF 7 MARCH 29, 2013 G. Welded Joints: Construct joints according to AWS D10.12/D10.12M, using qualified processes and welding operators according to Part 1 "Quality Assurance" Article. H. Flanged Joints: Select appropriate gasket material, size, type, and thickness for service application. Install gasket concentrically positioned. Use suitable lubricants on bolt threads. I. Pressure-Sealed Joints: Use manufacturer-recommended tool and procedure. Leave insertion marks on pipe after assembly. 3.5 FIELD QUALITY CONTROL A. Prepare hydronic piping according to ASME B31.9 and as follows: 1. Leave joints, including welds, uninsulated and exposed for examination during test. 2. Flush hydronic piping systems with clean water; then remove and clean or replace strainer screens. 3. Isolate equipment from piping. If a valve is used to isolate equipment, its closure shall be capable of sealing against test pressure without damage to valve. Install blinds in flanged joints to isolate equipment. 4. Install safety valve, set at a pressure no more than one-third higher than test pressure, to protect against damage by expanding liquid or other source of overpressure during test. B. Perform the following tests on hydronic piping: 1. Use ambient temperature water as a testing medium unless there is risk of damage due to freezing. Another liquid that is safe for workers and compatible with piping may be used. 2. While filling system, use vents installed at high points of system to release air. Use drains installed at low points for complete draining of test liquid. 3. Subject piping system to hydrostatic test pressure that is not less than 1.5 times the system's working pressure. Test pressure shall not exceed maximum pressure for any vessel, pump, valve, or other component in system under test. Verify that stress due to pressure at bottom of vertical runs does not exceed 90 percent of specified minimum yield strength or 1.7 times "SE" value in Appendix A in ASME B31.9, "Building Services Piping." 4. After hydrostatic test pressure has been applied for at least 10 minutes, examine piping, joints, and connections for leakage. Eliminate leaks by tightening, repairing, or replacing components, and repeat hydrostatic test until there are no leaks. 5. Prepare written report of testing. END OF SECTION 232113