VA 23 11 23-2011 FACILITY NATURAL-GAS PIPING.pdf

1、05-11 23 11 23 - 1 SECTION 23 11 23 FACILITY NATURAL-GAS PIPING SPEC WRITER NOTE: Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. Where the scope of work includes installation of a gas meter, ensure t

2、ie-in with the building metering system, if any, at the VA facility. Use section 25 25 10 for guidance. PART 1 - GENERAL 1.1 DESCRIPTION Fuel gas systems, including piping, equipment and all necessary accessories as designated in this section. Fuel gas piping for central boiler plants is not include

3、d. 1.2 RELATED WORK A. Section 07 84 00, FIRESTOPPING: Penetrations in rated enclosures. B. Section 09 91 00, PAINTING: Preparation and finish painting and identification of piping systems. C. Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING. D. Section 22 05 23, GENERAL DUTY VALVES FOR PLUMBING P

4、IPING E. Section 23 07 11, HVAC and BOILER PLANT INSULATION: Pipe Insulation. F. Section 23 21 11, BOILER PLANT PIPING SYSTEMS: Fuel Gas Piping For Boiler Plants. G. Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and training. H. Sectio

5、n 23 51 00 BREECHINGS, CHIMEYS, and STACKS I. Section 25 10 10 ADVANCED UTILITY METERING SYSTEM J. Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS 1.3 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. Manufacturers Literature and Data: 1. Pipe

6、 felt material shall be fibrous glass mat as specified in Appendix Section A2.1 of AWWA C203. 2. Adhesive-thermoplastic Resin Coating: Fed. Spec. L-C-530, Type I 3. Thermosetting Epoxy Coating: Fed. Spec. L-C-530, Type II 4. Field-applied plastic tape material used on pipe joints and for repairing d

7、amaged areas of shop-applied coatings, Fed. Spec. L-T-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 11 23 - 4 1512, Type I, 10 mils nominal thickness for pipe joints, and Type II, 20 mils nominal thickness for coating repairs. C. Holiday I

8、nspections: Procedure for holiday inspection: Holiday Inspection shall be conducted on all coatings to determine the presence and number of discontinuities in those coatings referenced in 2.6/B - 1, 2, 3, and 4 using a Tinker end entry, threaded ends, UL-listed for natural or LP gas shut off service

9、 when used on those services. B. Gas Vent Cocks: Type 701: Bronze body, tee handle, rated for 205 kPa at 38C (30 psi at 100F), ground plug, rated for tight shut-off on fuel gas service. 2.5 WATERPROOFING A. Provide at points where pipes pass through membrane waterproofed floors or walls in contact w

10、ith earth. B. Floors: Provide cast iron stack sleeve with flashing device and a underdeck clamp. After stack is passed through sleeve, provide a waterproofed caulked joint at top hub. C. Walls: See detail shown on drawings. 2.6 STRAINERS A. Provide on high pressure side of pressure reducing valves,

11、on inlet side of indicating and control instruments and equipment subject to sediment damage and where shown on drawings. Strainer element shall be removable without disconnection of piping. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 11

12、 23 - 6 B. Gas Lines: “Y“ type with removable mesh lined brass strainer sleeve. C. Body: Smaller than 80 mm (3 inches), brass or bronze; 80 mm (3 inches) and larger, cast iron or semi-steel. 2.7 DIELECTRIC FITTINGS Provide dielectric couplings or unions between ferrous and non-ferrous pipe. 2.8 GAS

13、EQUIPMENT CONNECTORS Flexible connectors with teflon core, interlocked galvanized steel protective casing, AGA certified design. PART 3 - EXECUTION 3.1 INSTALLATION A. General: Comply with the International Fuel Gas Code and the following: 1. Install branch piping for fuel gas and connect to all fix

14、tures, valves, cocks, outlets, casework, cabinets and equipment, including those furnished by the Government or specified in other sections. 2. Pipe shall be round and straight. Cutting shall be done with proper tools. Pipe, shall be reamed to full size after cutting. 3. All pipe runs shall be laid

15、out to avoid interference with other work. 4. Install valves with stem in horizontal position whenever possible. All valves shall be easily accessible. 5. Install union and shut-off valve on pressure piping at connections to equipment. 6. Pipe Hangers, Supports and Accessories: a. All piping shall b

16、e supported per the International Fuel Gas Code, Chapter No. 4. b. Shop Painting and Plating: Hangers, supports, rods, inserts and accessories used for Pipe supports shall be shop coated with red lead or zinc Chromate primer paint. Electroplated copper hanger rods, hangers and accessories may be use

17、d with copper tubing. c. Floor, Wall and Ceiling Plates, Supports, Hangers: 1) Solid or split unplated cast iron, chrome plated in finished areas. 2) All plates shall be provided with set screws. 3) Pipe Hangers: Height adjustable clevis type. 4) Adjustable Floor Rests and Base Flanges: Steel. 5) Co

18、ncrete Inserts: “Universal“ or continuous slotted type. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 11 23 - 7 6) Hanger Rods: Mild, low carbon steel, fully threaded or Threaded at each end with two removable nuts at each end for position

19、ing rod and hanger and locking each in place. 7) Riser Clamps: Malleable iron or steel. 8) Rollers: Cast iron. 9) Self-drilling type expansion shields shall be “Phillips“ type, with case hardened steel expander plugs. 10) Miscellaneous Materials: As specified, required, directed or as noted on the d

20、rawings for proper installation of hangers, supports and accessories. 7. Install cast chrome plated escutcheon with set screw at each wall, floor and ceiling penetration in exposed finished locations and within cabinets and millwork. 8. Penetrations: a. Fire Stopping: Where pipes pass through fire p

21、artitions, fire walls, smoke partitions, or floors, install a fire stop that provides an effective barrier against the spread of fire, smoke and gases as specified in Section 07 84 00, FIRESTOPPING. Completely fill and seal clearances between piping and openings with the fire stopping materials. b.

22、Waterproofing: At floor penetrations, completely seal clearances around the pipe and make watertight with sealant as specified in Section 07 92 00, JOINT SEALANTS. B. Piping shall conform to the following: 1. Fuel Gas: a. Entire fuel gas piping installation shall be in accordance with requirements o

23、f NFPA 54. b. Provide fuel gas piping with plugged drip pockets at low points. SPEC WRITER NOTE: Use the following paragraph only in Seismic Area A. c. Install automatic shutoff valve (earthquake valve) on discharge side of meter. Valve shall positively shut off supply of gas in case of pressure fai

24、lure, remain shut off until manually reopened, and be provided with outside adjustment for reset. 3.2 CLEANING OF SYSTEM AFTER INSTALLATION Clean all piping systems to remove all dirt, coatings and debris. / Remove all valves, controls etc., and reinstall after piping system has been cleaned./ Provi

25、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 11 23 - 8 3.3 TESTS A. General: Test system either in its entirety or in sections after system is installed or cleaned. B. Test shall be made in accordance with Section 406 of the International Fuel

26、 Gas Code. The system shall be tested at / a minimum of 1.5 times maximum working pressure, but not less than 3 psig (20 kPa) gage) / 100 psig (690 kPa). / 3.4 COMMISSIONING A. Provide commissioning documentation in accordance with the requirements of Section 23 08 00 COMMISSIONING OF HVAC SYSTEMS for all inspection, start up, and contractor testing required above and required by the System Readiness Checklist provided by the Commissioning Agent. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-