SECTION FACILITY FUEL - NATURAL GAS PIPING AND SYSTEMS

Transcription

1 SECTION PART 1 - GENERAL 1.1 SUMMARY A. Work Included: 1. Fuel Pipe and Pipe Fittings - General 2. Steel Pipe and Fittings, Above Grade 3. Steel Pipe and Fittings, Below Grade 4. Polyethylene Pipe and Fittings (IPS) 5. Natural Gas Valves 6. Gas Earthquake Valve 7. Natural Gas Pressure Regulators 8. Gas Solenoid Valves 9. Flexible Pipe Connectors - Gas Piping (CSA Listed) 10. Natural Gas Convenience Outlets PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Fuel Pipe and Pipe Fittings - General: 1. Flange Gaskets: a. Buna-N (Nitrile) b. NBR c. Viton d. Or approved equivalent. B. Steel Pipe and Fittings, Above Grade: 1. American Piping Products 2. US Steel C. Steel Pipe and Fittings, Below Grade: 1. American Piping Products 2. US Steel D. Polyethylene Pipe and Fittings (IPS) Exterior Application: 1. Gastite 2. Or approved equivalent. E. Natural Gas Valves: 1. Apollo 2. Jenkins Bros. 3. Lunkenheimer Co Page 1

2 4. Nibco 5. Watts 6. Or approved equivalent. F. Gas Earthquake Valve: 1. California Valve 2. QuakeMaster G. Natural Gas Pressure Regulators: 1. Maxitrol 2. Equimeter H. Gas Solenoid Valves: 1. ASCO Red Hat Series 8210 and Specific model numbers scheduled on Drawings. 2. Or approved equivalent. I. Flexible Pipe Connectors - Gas Piping (CSA Listed): 1. Dormont 2. Proflex J. Natural Gas Convenience Outlets: 1. MB Sturgis 2. Gastite K. As specified in Articles below, or approved equivalent. 2.2 FUEL PIPE AND PIPE FITTINGS - GENERAL A. Flange Gaskets: Gaskets to be constructed from elastomeric materials. B. Install per manufacturer's recommended installation requirements. 2.3 STEEL PIPE AND FITTINGS, ABOVE GRADE A. Steel Pipe (Above Grade Installation): 1. ASTM A53, electric-resistance welded Type E or seamless Type S, Grade B black pipe, manufactured for threaded and welded pipe connections. a. 2-inches and Smaller: Schedule 40, ASTM A53 black steel pipe and black malleable threaded fittings. b. 2-1/2-inches and Larger: Schedule 40, ASTM A53 black pipe with butt weld fittings. B. Fittings for Steel Pipe (Above Grade Installations): 1. General: Mark fittings, unions, and other products recognized as regularly available products in accordance with MSS SP-25. Marking on products of small size or shape may be omitted from sequence allowed by MSS SP-25, except for manufacturer's name or trademark. 2. Threaded Fittings: Conforming to ANSI B2.1, ASTM A47, 150 PSI rating, except where otherwise specified or prevailing codes or requirements dictate use of 300 PSI ratings. Fittings to be fabricated from standard malleable iron with dimensions conforming to ANSI B Page 2

3 3. Welded Fittings: Wrought carbon steel fittings, ASTM A234, ANSI B16.9, B Buttwelding type unless otherwise indicated to be socket welding type. 4. Flanges: Carbon steel conforming to ASTM A105, ANSI B16.5, and factory forged in USA. Flanges which have been machined, remade, painted, or are non-domestic origin are not acceptable. Provide raised or full face ends wherever indicated or required. 5. Flange Gaskets: Gaskets to be constructed from elastomeric materials. 6. Flange Hardware: Bolting materials to be corrosion resistant carbon steel bolts and hex nuts conforming to ASTM A307. Provide bolting materials used in containment sumps below grade applications, stainless steel bolts and hex nuts conforming to ASTM A453. Threads and dimensions to be in accordance with ANSI B1.1 and B Unions: Conform to ANSI B16.39, ASTM A47 and fabricated from malleable iron with bronze-to-iron ground joints rated at 150 percent design operating pressure. Threads to conform to ANSI B Threaded Pipe Plugs: Conforming to ANSI B Thread Lubricant: Meet or exceed CGA ratings and compliant with Federal Specification TT-S-1732, manufactured compatible with fuel oil. 2.4 STEEL PIPE AND FITTINGS, BELOW GRADE A. Steel Pipe (Exterior of Building Below Grade Installations): 1. ASTM A53, electric-resistance welded Type E or seamless Type S, Grade B black pipe, manufactured for threaded and welded pipe connections. a. 2-inches and Smaller: Schedule 40, ASTM A53 black steel pipe and black malleable threaded fittings. b. 2-1/2-inches and Larger: Schedule 40, ASTM A53 black pipe with butt weld fittings. B. Fittings for Steel Pipe (Exterior of Building Below Grade Installations): 1. General: Mark fittings and other products recognized as regularly available products in accordance with MSS SP-25. Marking on products of small size or shape may be omitted from sequence allowed by MSS SP-25, except for manufacturer's name or trademark. 2. Threaded Fittings: Conforming to ANSI B2.1, ASTM A47, 150 PSI rating, except where otherwise specified, or prevailing codes or requirements dictate use of 300 PSI ratings. Fittings fabricated from standard malleable iron with dimensions conforming to ANSI B Welded Fittings: Wrought carbon steel fittings, ASTM A234, ANSI B16.9, B Buttwelding type unless otherwise indicated to be socket welding type. 4. Threaded Pipe Plugs: Conforming to ANSI B Thread Lubricant: Meet or exceed CGA ratings and compliant with Federal Specification TT-S-1732, manufactured compatible with fuel oil. C. Corrosion Control: 1. Underground Steel Piping Corrosion Protection: Factory wrap uninsulated underground steel piping systems with protective coating composed of a coal-tar saturated wrapping tape over a 20 mil thick coal-tar epoxy coating, equivalent to "Republic X-Tru-Coat." Wrap joints spirally with a minimum overlap of 1/2 tape width. Extend wrap not less than 3-inches above grade. Provide tinker test to check for holidays. Provide cathodic protection to meet requirements of NACE Standard RP /2-inch and Larger: Schedule 40, A53 black pipe with butt weld fittings. 2.5 POLYETHYLENE PIPE AND FITTINGS (IPS) A. Polyethylene Pipe Fittings (Below Grade Exterior of Building Installations at 30 PSIG and Less Only): 1. Fittings: Manufacture polyethylene fittings furnished under this specification using compounds complying with requirements of Paragraph B, above, and appropriate Page 3

4 requirements of Part 192 of the Minimum Federal Safety Standards. Socket type fittings comply with ASTM Butt fusion fittings to comply with ASTM Electrofusion fittings comply with ASTM F1055. Plastic mechanical fittings comply with ASTM F1924. Mechanical fittings produced from metallic or materials other than plastics listed in Paragraph B be approved only after submission of appropriate test data and service histories indicating their acceptability for the intended service. In addition, categorize mechanical fittings for pullout resistance as stated in ASTM and identified as to appropriate category. Plastic valves meets requirements of ANSI Standard B Specifications and requirements for fittings supplied complies with appropriate Sections of Part 192 of the Minimum Federal Safety Standards or NFPA 58 LP Gas Code. a. ASTM D2683, socket-type polyethylene fittings b. ASTM D3261, butt-fusion polyethylene fittings c. ASTM F1055, electro-fusion polyethylene fittings d. ASTM F1924, mechanical push-on fittings for polyethylene pipe 2. Anodeless Epoxy Coated Steel Riser Assembly: Provide an anodeless riser assembly to terminate underground polyethylene piping either above grade or inside a concrete vault. a. Provide a riser casing for corrosion protection at each riser assembly. Casing will manufactured from ASTM A53, Schedule 40 steel pipe, ASTM A513 ER steel pipe (minimum inch pipe wall), or flexible metallic tubing with a minimum crush strength of 1000 PSIG and a tensile strength of 300 PSIG including transition connection as tested by manufacturer. 1) Horizontal portion of riser assembly will be installed with minimum 12-inches of compacted cover. 2) Factory-assembled riser assemblies will be sealed and leak tested by the manufacturer. 3) Field-assembled riser assemblies will be accepted when supplied in kit form with necessary hardware for the riser installation. Field-assembled riser assemblies will be provided compliant with following requirements: (a) They are design certified. (b) (c) They are sealed and pressure tested by installer. They are assembled and installed in accordance with manufacturer's instructions. 3. Marking: a. Mark pipe and tubing in accordance with ASTM Marking: legible and remain legible under normal handling and installation practices. Indent marking may be utilized provided (1) marking does not reduce wall thickness to less than minimum value for pipe or tubing, (2) it has been demonstrated that these marks have no effect on long-term strength of pipe or tubing, and (3) marking will not provide leakage channels when approved elastomeric gasket compression fittings are used to make joints. b. Mark fusion fittings on body or hub. Marking in accordance with ASTM or standard to which fitting is manufactured. Mark mechanical fittings in accordance with fitting standard to which it is manufactured or Part 192 of Minimum Federal Safety Standard Section Fusion Qualification: Manufacturer of pipe, tubing, or fittings supplied under this Specification to establish and certify heat fusion procedures for joining of materials supplied in accordance with applicable Section of (CFR) Title 49, Part 192 "Transportation of Natural or Other Gases by Pipeline: Minimum Federal Safety Standards," paragraph Furnish qualified fusion procedures, with appropriate supporting data, to purchaser upon request. Suitable generic fusion procedures are included in PPI TR-33, Generic Butt Fusion Joining Procedure for Polyethylene (PE) Gas Pipe Page 4

5 2.6 NATURAL GAS VALVES A. 2-inches and Smaller: MSS SP-110 ball valves constructed in compliance with ASME B UL listed, FM approved, two-piece construction, threaded, bronze or brass body, full port, chrome plated brass ball, blowout-proof stem design, 125 PSI WOG working pressure. B. 2-1/2-inches and Larger: 100 to 125 PSI rated, all bronze or iron body/bronze trimmed plug cock type, square head or tee/lever handle operation. CSA listed. 2.7 GAS EARTHQUAKE VALVE A. Gas line valve providing automatic shutoff in case of earthquake. UL listed, CSA certified and FM approved. The valve or system to actuate shutoff means within 5 seconds when subjected to horizontal, sinusoidal oscillation having a peak acceleration of 0.3G (2.94 m/s2) and period of 0.4 seconds. Sensing means of valve or system not to actuate shutoff means when subjected for 5 seconds to horizontal, sinusoidal oscillations having: 1. A peak acceleration of 0.4G (3.94 m/s2) with a period of 0.1 second, 2. A peak acceleration of 0.08G (0.078 m/s2) with a period of 0.4 second, and 3. A peak acceleration of 0.08G (0.078 m/s2) with a period of 1.0 second. B. Valve requires manual reset. Provide with needed spare parts to allow resetting after having been tripped. Valve to be same size as line size installed. 2.8 NATURAL GAS PRESSURE REGULATORS A. Natural Gas: Diaphragm and spring actuated type, with ventless or vented relief feature. Construction, pressure range and venting features suitable for intended service. Regulator to meet code and serving utility requirements. Pipe vented type to atmosphere in approved location. 2.9 GAS SOLENOID VALVES A. General: Solenoid bodies will be brass construction with NPT ports. The valves will be "normally closed" and pilot operated or direct acting depending on application. B. Electrical: 125V/1ph/60Hz. C. Internal Construction: Type 304 and Type 316 internal parts, elastomeric seals and lubricants as appropriate for gas service FLEXIBLE PIPE CONNECTORS - GAS PIPING (CSA LISTED) A. Inner Hose: Type 304 stainless steel. B. Exterior Sleeve: Braided, Type 304 stainless steel. C. Pressure Rating: 175 PSI at 70 degrees F up to 4-inch pipe. D. Joint: Threaded carbon steel. E. Maximum Offset: 3/4-inch on each side of installed center line. F. Flexible Connectors: Flexible connectors used in LP and LPG piping systems compliant with following: 1. Install in accordance with manufacturer's instructions Page 5

6 2. Flexible connectors and hose used as flexible connectors not exceed 3-feet in length where used with liquid or vapor piping on portable or stationary tanks. 3. Hose permitted to be used if flexibility is required for liquid or vapor transfer NATURAL GAS CONVENIENCE OUTLETS A. Outlet designed for connection only when gas valve is in closed position. B. Capacity of up to 60,000 BTU for natural gas. C. Temperature Range: -40 Degrees F to 240 degrees F. D. Pressure Rating: To 26 PSIG and tested to 350 PSIG. E. ANSI Z21.90 certification. END OF SECTION Page 6