SECTION STEAM AND STEAM CONDENSATE PIPING AND VALVES. B. ANSI/ASME B Malleable Iron Threaded Fittings Class 150 and 300.

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1 SECTION STEAM AND STEAM CONDENSATE PIPING AND VALVES PART 1 - GENERAL 1.1 DESCRIPTION OF WORK A. Pipe and pipe fittings. B. Valves. 1.2 REFERENCES A. ANSI/ASME SEC IX - Welding and Brazing Qualifications. B. ANSI/ASME B Malleable Iron Threaded Fittings Class 150 and 300. C. ANSI/ASME B Code for Power Piping. D. ANSI/AWS D1.1 - Structural Welding Code. E. ASTM A53, Grade B - Pipe, Steel, Black and Hot-Dipped Zinc Coated, Welded and Seamless. 1.3 DEFINITIONS A. HP Systems: High-pressure piping operating at more than 15 psig as required by ASME B31.1. B. LP Systems: Low-pressure piping operating at 15 psig or less as required by ASME B PERFORMANCE REQUIREMENTS A. Components and installation shall be capable of withstanding the following minimum working pressures and temperatures: 1. HP Steam Piping: 75psig. 2. LP Steam Piping: 15psig. 3. Condensate Piping: 15 at 250 deg F. 4. Makeup-Water Piping: 80 psig at 150 deg F. 5. Blowdown-Drain Piping: Equal to pressure of the piping system to which it is attached. 6. Air-Vent and Vacuum-Breaker Piping: Equal to pressure of the piping system to which it is attached. 7. Safety-Valve-Inlet and -Outlet Piping: Equal to pressure of the piping system to which it is attached. GMP-R1 Addendum # Randall Stout Architects, Inc.

2 1.5 REGULATORY REQUIREMENTS A. Conform to ANSI/ASME B QUALITY ASSURANCE A. Valves: Manufacturer's name and pressure rating marked on valve body. B. Steel Support Welding: Qualify processes and operators according to AWS D1.1, "Structural Welding Code - Steel." C. Welding Materials and Procedures: Conform to ANSI/ASME SEC IX and applicable state labor regulations. D. Welders Certification: In accordance with ANSI/ASME SEC IX or ANSI/AWS D SUBMITTALS A. Include data on pipe materials, pipe fittings, valves and accessories. B. Include welders certification of compliance with ANSI/ASME SEC 9 or ANSI/AWS D1.1. C. Submit a valve schedule listing each valve number, valve type, size, model and service with cross reference to supporting product data. 1.8 DELIVERY, STORAGE, AND HANDLING A. Deliver and store valves in shipping containers with labeling in place. 1.9 WELDING A. Refer to Specification Section for welding procedures. PART 2 - PRODUCTS 2.1 HIGH PRESSURE PLANT STEAM AND VENT PIPING, 2" AND BELOW (75 PSIG AND ABOVE) A. Steel Pipe: ASTM A53 Grade B Seamless, standard weight 150 lb., black, threaded ends. 1. Fittings: ANSI/ASTM B16.3, malleable iron. 2.2 HIGH PRESSURE PLANT STEAM AND VENT PIPING, 2-1/2" AND ABOVE (75 PSIG AND ABOVE) A. Steel Pipe: ASTM A53 Grade B Seamless, standard weight, black, welded ends. 1. Fittings: Standard weight, carbon steel, butt weld, ASTM A234, Class Joints: Butt welded, AWS D1.1. GMP-R1 Addendum # Randall Stout Architects, Inc.

3 2.3 LOW PRESSURE STEAM AND VENT PIPING, 2" AND BELOW (25 PSIG AND BELOW) A. Steel Pipe: ASTM A53 Grade B Seamless, standard weight 150 lb., black, threaded ends. 1. Fittings: ANSI/ASTM B16.3, malleable iron. 2.4 LOW PRESSURE PLANT STEAM AND VENT PIPING, 2-1/2" AND ABOVE (25 PSIG AND BELOW) A. Steel Pipe: ASTM A53 Grade B Seamless, standard weight, black, welded ends. 1. Fittings: Standard weight, carbon steel, butt weld, ASTM A234, Class Joints: Butt welded, AWS D LOW PRESSURE CLEAN STEAM AND VENT PIPING (125 PSIG) A. Stainless steel pipe, Type 316 Schedule 40, threaded ends. 1. Fittings: 150 lb. stainless steel, threaded ends. 2.6 PUMPED AND GRAVITY STEAM CONDENSATE PIPING, 2" AND BELOW A. Steel Pipe: ASTM A53 Grade B Seamless, Schedule 80, black, threaded ends. 1. Fittings: ANSI/ASTM B16.3, malleable iron, 300 lb. 2.7 PUMPED AND GRAVITY STEAM CONDENSATE PIPING, 2-1/2" AND ABOVE A. Steel Pipe: ASTM A53 Grade B Seamless, Schedule 80, black, welded ends. 1. Fittings: Carbon steel, butt weld, ASTM A234, Class Joints: Butt welded, AWS D STAINLESS-STEEL BELLOWS, FLEXIBLE CONNECTORS: A. Body: Stainless-steel bellows with woven, flexible, bronze, wire-reinforced, protective jacket. B. End Connections: Threaded or flanged to match equipment connected. C. Performance: Capable of 3/4-inch misalignment. D. CWP Rating: 150-psig. E. Maximum Operating Temperature: 250 deg F. 2.9 FLANGES, UNIONS AND COUPLINGS A. Pipe Size 2 Inches and Under: 300 psig malleable iron unions for threaded piping. GMP-R1 Addendum # Randall Stout Architects, Inc.

4 B. Pipe Size Over 2 Inches: ANSI B16-10, 300 psig standard weight carbon steel, weld neck flanges GLOBE VALVES A. Up to and including 2 Inches: Class 150 bronze body, bronze trim, union bonnet, handwheel, integral seat, renewable seat and disc, screwed ends. Nibco Model T-235 or equal. B. Over 2 Inches: Class 250 iron body, bronze trim, bolted bonnet, handwheel, flanged ends, renewable seat and disc. Nibco Model F-768-B or equal GATE VALVES A. Up to 2 Inches : Class 150 bronze body, bronze trim, rising stem, handwheel, inside screw, solid wedge, threaded ends. Nibco Model T-134 or equal. B. Over 2 Inches : Class 250 iron body, bronze trim, outside screw and yoke, handwheel, bolted bonnet, solid wedge, flanged ends. Nibco Model F or equal STOP-CHECK VALVES 1. Manufacturer: Crane Co., A.Y. McDonald Mfg. Co. or equal 2. Body and Bonnet: Malleable iron. 3. End Connections: Flanged. 4. Disc: Cylindrical with removable liner and machined seat. 5. Stem: Brass alloy. 6. Operator: Outside screw and yoke with cast-iron handwheel. 7. Packing: Polytetrafluoroethylene-impregnated packing with two-piece packing gland assembly. 8. Pressure Class: STRAINERS A. Y-Pattern Strainers 1. Body: ASTM A 126, Class B cast iron, with bolted cover and bottom drain connection. 2. End Connections: Threaded ends for strainers NPS 2 and smaller; flanged ends for strainers NPS 2-1/2 and larger. 3. Strainer Screen: Stainless-steel, 20 mesh strainer, and perforated stainless-steel basket with 50 percent free area. 4. Tapped blowoff plug. 5. CWP Rating: 250-psig working steam pressure. B. Basket Strainers GMP-R1 Addendum # Randall Stout Architects, Inc.

5 1. Body: ASTM A 126, Class B cast iron, with bolted cover and bottom drain connection. 2. End Connections: Threaded ends for strainers NPS 2 and smaller; flanged ends for strainers NPS 2-1/2 and larger. 3. Strainer Screen: Stainless-steel, 20 mesh strainer, and perforated stainless-steel basket with 50 percent free area. 4. CWP Rating: 250-psig working steam pressure. PART 3 - EXECUTION 3.1 PREPARATION A. Ream pipe and tube ends. Remove burrs. Bevel plain end ferrous pipe. B. Remove scale and dirt on inside and outside before assembly. C. Prepare piping connections to equipment with flanges or unions. D. After completion, fill, clean, and treat systems. 3.2 INSTALLATION A. Route piping in orderly manner, plumb and parallel to building structure, and maintain gradient. B. Install piping to conserve building space and not interfere with use of space, other work, or equipment. C. Install piping to allow for expansion and contraction without stressing pipe, joints, or connected equipment. Refer to Section D. Provide clearance for installation of insulation and access to valves and fittings. E. Slope steam piping one inch in 40 feet (0.25 percent) in direction of flow. Use eccentric reducers to maintain bottom of pipe level. F. Slope steam condensate piping one inch in 40 feet (0.25 percent). Provide drip trap assembly at low points and before control valves, pressure reducing sets, and every 50 feet of horizontal steam pipe. Run condensate lines from trap to nearest condensate receiver. Provide loop vents over trapped sections. G. Where pipe support members are welded to structural building framing, scrape, brush clean, and apply one coat of zinc rich primer to welding. H. Prepare pipe, fittings, supports, and accessories for finish painting. Refer to Section I. Install valves with stems upright or horizontal, not inverted. J. Installation shall meet ANSI B31.1. GMP-R1 Addendum # Randall Stout Architects, Inc.

6 3.3 APPLICATION A. Install unions downstream of valves and at equipment or apparatus connections. Install dielectric unions where joining dissimilar materials. B. Install shutoff duty valves at branch connections to steam supply mains, at steam supply connections to equipment, and at the outlet of steam traps. C. Install safety valves on pressure-reducing stations and elsewhere as required by ASME Boiler and Pressure Vessel Code. Install safety-valve discharge piping, without valves, to nearest floor drain or as indicated on Drawings. Comply with ASME Boiler and Pressure Vessel Code: Section VIII, Division 1, for installation requirements. D. Install globe valves in bypass piping where shown. E. Install drains, consisting of a tee fitting, NPS 3/4 full port-ball valve, and short NPS 3/4 threaded nipple with cap, at low points in piping system mains and elsewhere as required for system drainage. F. Install strainers on supply side of control valves, pressure-reducing valves, traps, and elsewhere as indicated. Install NPS 3/4 nipple and full port ball valve in blowdown connection of strainers NPS 2 and larger. Match size of strainer blowoff connection for strainers smaller than NPS 2. G. Install expansion loops, expansion joints, anchors, and pipe alignment guides as specified in Division 15 Section "Pipe Expansion Fittings and Loops." H. All valves 4" and larger located more than 7 feet above the finished floor shall be furnished with chain wheels except where valves are accessible from the catwalk. I. Blowdown-Drain Piping: Same materials and joining methods as for piping specified for the service in which blowdown drain is installed. J. Air-Vent Piping 1. Inlet: Same as service where installed. 2. Outlet: Type K (A) annealed-temper copper tubing with soldered or flared joints. K. Vacuum-Breaker Piping: Outlet, same as service where installed. L. Safety-Valve-Inlet and -Outlet Piping: Same materials and joining methods as for piping specified for the service in which safety valve is installed. 3.4 FLUSH AND LEAK TESTING A. Isolate equipment and bypass around all equipment. B. Flush the system of all pipe slag and particulate matter. C. Fill the system with hot water (140 F.) and add a solution of hypochlorate as recommended by the manufacturer. Circulate the system for 24 hours. Blowdown and clean all strainers. D. Drain the system and fill with fresh water. E. Hydrostatic pressure test psig as detailed in Section GMP-R1 Addendum # Randall Stout Architects, Inc.

7 F. Drain system. 3.5 TERMINAL EQUIPMENT CONNECTIONS A. Size for supply and return piping connections shall be the same as or larger than equipment connections. B. Install traps and control valves in accessible locations close to connected equipment. C. Install bypass piping with globe valve around control valve. If parallel control valves are installed, only one bypass is required. D. Install vacuum breakers downstream from control valve, close to coil inlet connection. E. Install a drip leg at coil outlet. 3.6 FIELD QUALITY CONTROL A. Prepare steam and condensate piping according to ASME B31.1, "Power Piping" and ASME B31.9, "Building Services Piping," and as follows: 1. Leave joints, including welds, uninsulated and exposed for examination during test. 2. Provide temporary restraints for expansion joints that cannot sustain reactions due to test pressure. If temporary restraints are impractical, isolate expansion joints from testing. 3. Flush system with clean water. Clean strainers. 4. 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. B. Perform the following tests on steam and condensate 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. Subject piping system to hydrostatic test pressure that is not less than 1.5 times the 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. 3. 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. C. Prepare written report of testing. END OF SECTION GMP-R1 Addendum # Randall Stout Architects, Inc.

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