VA 23 21 11-2011 BOILER PLANT PIPING SYSTEMS.pdf

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1、09-11 23 21 11 - 1 SECTION 23 21 11 BOILER PLANT PIPING SYSTEMS SPEC WRITER NOTES: 1. Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable to the project and renumber the paragraphs. 2. References to pressure in this section are gage pressure unless

2、 otherwise noted. PART 1 GENERAL: 1.1 DESCRIPTION: All boiler plant piping systems, except plumbing and sanitary, including piping supports. Piping located outside of the boiler plant building is not included except for gas regulator and meter stations. 1.2 RELATED WORK: /A. Section 13 05 41, SEISMI

3、C RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS./ B. Section 23 05 10, COMMON WORK RESULTS FOR Boiler Plant and STEAM GENERATION C. Section 23 05 51, NOISE and VIBRATION CONTROL FOR BOILER PLANT. D. Section 23 07 11, HVAC and BOILER PLANT INSULATION. E. Section 22 05 23, GENERAL-DUTY VALVES F

4、OR PLUMBING PIPING. F. Section 22 31 11, WATER SOFTENERS. G. Section 22 67 21, WATER DEALKALIZING SYSTEM. H. Fuel oil tanks and piping: Section 23 10 00, FACILITY FUEL SYSTEMSS. I. Control valves: Section 23 52 39, FIRE-TUBE BOILERS. J. Control valves: Section 23 52 33, WATER-TUBE BOILERS. K. Contro

5、l valves: Section 23 50 11, BOILER PLANT MECHANICAL EQUIPMENT. L. Flow Meters: Section 23 09 11, INSTRUMENTATION and CONTROL FOR BOILER PLANT. M. Section 23 08 11, DEMONSTRATIONS and TESTS FOR BOILER PLANT. N. Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS. Requirements for commissioning, systems r

6、eadiness checklists, and training 1.3 QUALITY ASSURANCE: A. Entire installation shall comply with ASME Power Piping Code, ASME B31.1 and appendices. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 23 21 11 - 2 B. Boiler External Piping, as defi

7、ned in the ASME Boiler and Pressure Vessel Code, Section I, is required to be constructed and inspected in conformance with the ASME Code. C. Mechanics shall be skilled in their work or trade. Welders on pressure vessels or piping shall show evidence of qualification in accordance with the ASME Powe

8、r Piping Code and the ASME Boiler and Pressure Vessel Code. Certify that each welder has passed American Welding Society (AWS) qualification tests for the welding processes involved, and that certification is current. Each welder shall utilize a stamp to identify all work performed by the welder. Th

9、e Government reserves the right to reject any personnel found unqualified in the performance of work for which they are employed. 1.4 SUBMITTALS: A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. Piping: 1. ASTM material specification number. 2. Grade, class

10、 or type, schedule number. 3. Manufacturer. C. Pipe Fittings, Unions, Flanges: 1. ASTM material specification number. 2. ASME standards number. 3. Catalog cuts. 4. Pressure and temperature ratings. D. Valves - Gate, Globe, Check, Plug, Butterfly, Ball: 1. Catalog cuts showing design and construction

11、. 2. Pressure and temperature ratings. 3. Materials of construction. 4. Accessories. E. Sight flow indicators: 1. Catalog cuts showing design and construction. 2. Pressure and temperature ratings. 3. Materials of construction. F. Quick-Couple Hose Connectors and Steam Hose: 1. Catalog cuts showing d

12、esign and construction. 2. Pressure and temperature ratings. 3. Materials of construction. 4. Type of seal between couplings. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 23 21 11 - 3 5. Flexibility of steam hose. G. Pressure Reducing and Re

13、gulating Valves, Back Pressure Relief Valves, Safety Valves, Relief Valves: 1. Catalog cuts showing design and construction. 2. Service limitations (type of fluid, maximum pressure and temperatures). 3. Materials of construction. 4. Flow capacity at required set pressure. 5. Predicted sound levels,

14、at operating condition, for steam pressure reducing valves. H. Strainers: 1. Catalog cuts showing design and construction. 2. Pressure and temperature ratings. 3. Materials of construction. 4. Strainer basket or liner mesh. 5. Pressure loss and flow rate data. I. Emergency Gas Safety Shutoff Valves,

15、 Automatic Earthquake Gas Valves: 1. Catalog cuts showing design and construction. 2. Maximum pressure rating. 3. Material of construction. 4. Pressure loss and flow rate data. J. Steam Traps: 1. Catalog cuts showing design and construction. 2. Service limitations (maximum pressures and temperatures

16、). 3. Materials of construction. 4. Flow rates at differential pressures shown on drawings. 5. Orifice size for each trap. K. Flexible Connectors: 1. Catalog cuts showing design and construction. 2. Pressure and temperature ratings. 3. Materials of construction. 4. Maximum allowable lateral and axia

17、l movements. 5. Description of type of movement permitted, intermittent offset or continuous vibration. L. Pipe Support Systems: 1. Credentials of technical personnel who will design the support systems. 2. Validation of computer program for pipe support selection. Provided by IHSNot for ResaleNo re

18、production or networking permitted without license from IHS-,-,-09-11 23 21 11 - 4 3. Input and output data for pipe support selection program for all piping systems with pipe sizes 60 mm (2-1/2 inches) and above. 4. Boiler and feedwater deaerator steam nozzle (pipe connection) allowable and actual

19、forces and moments imposed by connecting piping. 5. Hanger load calculation methods and results for piping systems with pipe sizes 50 mm (2 inches) and below. 6. Piping layouts showing location and type of each hanger and support. 7. Catalog cuts showing design and construction of each hanger and su

20、pport and conformance of hangers and supports to MSS standards. 8. Drawings showing arrangement and sizes of all components comprising each spring-type hanger and support assembly. 9. Load rating and movement tables for all spring hangers, and seismic shock absorbing devices. 1.5 PRODUCT DELIVERY, S

21、TORAGE AND HANDLING: All piping shall be stored and kept free of foreign material and shall be internally and externally cleaned of all oil, dirt, rust and foreign material. Deliver and store valves and pipe hangers in sealed shipping containers with labeling in place. Storage must be in dry, protec

22、ted location. SPEC WRITER NOTE: Fill blank spaces within this paragraph. Specification is based on high pressure saturated steam, 110 to 1025 kPa (16 - 150 psi), main header pressure in the boiler plant. The entire specification must be revised if header pressures are significantly lower or higher.

23、1.6 INFORMATION ON PRESSURE-TEMPERATURE DESIGN OF PIPING SYSTEMS: A. Steam service pressures are selected to provide optimum pressure to the facilities served by the boiler plant. Main steam header pressure shall be controlled at _kPa (_psi). Maximum pressure capability of steam systems between boil

24、ers and through first pressure reducing valve protected by a safety valve shall be governed by the pressure/temperature relationship of the highest safety valve setting shown for the boilers. B. Steam distribution systems protected by safety valves following pressure reducing stations or protected b

25、y safety valves on the boilers shall be governed by the pressure/temperature relationship developed by the maximum setting of the safety valve on that system. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 23 21 11 - 5 C. Boiler feedwater syst

26、ems between boiler feed pumps, economizers (if provided), and boilers are designed for a normal maximum temperature of 138 C (280 F), and emergency temperature of 213 C (415 F) (if economizers are provided and economizer safety relief valve setting is 1896 kPa (275 psi). Design pressure is the great

27、er of: boiler feed pump shut off head; or 1896 kPa (275 psi) set pressure, plus accumulation, of economizer (if provided) relief valve. D. Condensate collection and transfer systems to suction of boiler feed pumps are designed for maximum temperatures to 100 C (212 F), and pressures 276 kPa (40 psi)

28、. Vacuum return systems shall operate between 0 and 27 kPa (0 and 8 inch Hg) vacuum and equivalent steam saturation temperatures. SPEC WRITER NOTE: Add pressure information on propane/air system if system is provided. E. Natural gas fuel systems are designed and materials and equipment are applied t

29、o prevent failure under gas pressure of _kPa (_ psi) entering Government property. LP gas systems for igniters (pilots) are designed for maximum LP tank pressure of 1725 kPa (250 psig). F. Fuel oil system pressures are determined by the requirements of the burners and fuel trains. No. 2 oil systems

30、are designed for maximum temperatures of 55 C (130 F), and pressures of 1025 kPa (150 psi). No. 5 or 6 oil systems are designed for 120 C (250 F), and 1025 kPa (150 psi). G. Water service pressures are _ kPa (_psi) maximum. Systems are designed to operate under conditions of maximum available pressu

31、re. H. Drips, drains, blowdown, water sampling, and chemical treatment are designed, and materials and equipment are applied in accordance with the maximum pressure and temperature of the system with which they are associated. I. Low pressure steam, condensate, vacuum and vents are designed for serv

32、ice pressures and temperatures equivalent to 103 kPa (15 psi) saturated steam. J. Compressed air systems are designed to accommodate a maximum pressure of 850 kPa (125 psi). K. Instrumentation and control piping shall be provided for the service and pressure characteristics of the systems to which t

33、hey are connected. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 23 21 11 - 6 1.7 APPLICABLE PUBLICATIONS: A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the tex

34、t by the basic designation only. B. ASTM International (ASTM): A47/A47M-99(2009) Standard Specification for Ferritic Malleable Iron Castings A48/A48M-03(2008) Standard Specification for Gray Iron Castings A53/A53M-10 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded a

35、nd Seamless A105/A105M-10 Standard Specification for Carbon Steel Forgings for Piping Applications A106/A106M-10 Standard Specification for Seamless Carbon Steel Pipe For High Temperature Service A126-04(2009) Standard Specification for Gray Iron Castings for Valves, Flanges and Pipe Fittings A193/A

36、193M-10 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High Temperature Service A194/A194M-10 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure or High-Temperature Service, or Both A197/A197M-00(2006) Standard Specification for Cupol

37、a Malleable Iron A216/A216M-08 Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, For High Temperature Service A234/A234M-10 Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service A269-10 Standard Spec

38、ification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service A395/A395M-99(2009) Standard Specification for Ferritic Ductile Iron Pressure-Retaining Castings for use at Elevated Temperatures Provided by IHSNot for ResaleNo reproduction or networking permitted without licen

39、se from IHS-,-,-09-11 23 21 11 - 7 A536-84(2009) Standard Specification for Ductile Iron Castings B61-08 . Standard Specification for Steam or Valve Bronze Castings B62-09 . Standard Specification for Composition Bronze or Ounce metal Castings B88/B88M-09 Standard Specification for Seamless Copper W

40、ater Tube C. American Society of Mechanical Engineers (ASME): Boiler and Pressure Vessel Code: 20072010 Edition with current Addenda Section I Power Boilers Section IX . Welding and Brazing Qualifications B16.3-2006 . Malleable Iron Threaded Fittings B16.4-2006 . Gray Iron Threaded Fittings B16.5-20

41、09 . Pipe Flanges and Flanged Fittings: NPS Through 24 B16.9-2007 . Factory Made Wrought Buttwelding Fittings B16.11-2009 Forged Fittings, Socket-Welding and Threaded B16.22-2001 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings B31.1-2010 . Power Piping D. Manufacturers Standardization

42、 Society of the Valve and Fittings Industry (MSS): SP-45-03(2008) . Bypass and Drain Connections SP-58-2009 . Pipe Hangers and Supports-Materials, Design, Manufacture, Selection, Application, and Installation SP-69-2003 . Pipe Hangers and Supports-Selection and Application SP-80-2008 . Bronze, Gate,

43、 Globe, Angle and Check Valves SP-89-2003 . Pipe Hangers and Supports-Fabrication and Installation Practices SP-90-2000 . Guidelines on Terminology for Pipe Hangers and Supports SP-97-2006 . Integrally Reinforced Forged Branch Outlet Fittings Socket Welding, Threaded and Buttwelding Ends Provided by

44、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 23 21 11 - 8 SP-127-2001 Bracing for Piping Systems Seismic Wind Dynamic Design, Selection, Application E. National Fire Protection Association (NFPA): 30-2008 Flammable and Combustible Liquids Code 31-2011

45、Standard for the Installation of Oil Burning Equipment F. American Welding Society (AWS): B2.1-2009 Specification for Welding Procedure and Performance Qualification G. Pipe Fabrication Institute (PFI): PFI ES-24-08 . Pipe Bending Methods, Tolerances, Process and Material Requirements PART 2 PRODUCT

46、S: SPEC WRITER NOTE: Make material requirements agree with applicable requirements specified in the referenced Applicable Publications. Update and specify only that which applies to the project. 2.1 STEAM PIPING: A. Pipe: Carbon steel, ASTM A53 Grade B or ASTM A106 Grade B, seamless or electric resi

47、stance welded (ERW). Schedule 40 for piping /up to 862 kPa (125 psig)/ with welded ends, Schedule 80 for piping with threaded ends /and piping over 862 kPa (125 psig) with welded ends./Standard weight permitted for pipe sizes 300 mm (12 inches) and above./ B. Joints: 1. Pipe sizes 65 mm (2-1/2 inche

48、s) and above: Butt-welded 2. Pipe sizes 50 mm (2 inches) and below: Threaded, butt-welded, or socket-welded. C. Fittings: 1. Welded joints: Steel, ASTM A234, Grade B, ASME B16.9, same schedule as adjoining pipe, all elbows long radius. 2. Threaded joints: Forged steel, ASME B16.ll, 13,790 kPa (2000

49、psi class; or malleable iron, ASTM A47 or A197, ASME B16.3, 2050 kPa (300 psi) class. 3. Socket-welded joints: Forged steel, ASME B16.11, 13,790 kPa (2000 psi) class. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 23 21 11 - 9 D. Unions on Threaded Piping: