Fuel Gas Piping ME- Building Group

SECTION 15194 - FUEL GAS PIPING

PART 1 - GENERAL

1.1SUMMARY

  1. This Section includes fuel gas piping, specialties, and accessories within the building.

1.2PROJECT CONDITIONS

  1. Low Gas System Pressure: 5.0 psig or less.
  2. High Gas System Pressure: Pressure is greater than 5.0 psig
  3. Design values of fuel gas supplied for these systems are as follows:
  4. Nominal Heating Value: 1000 Btu/cu.ft.
  5. Nominal Specific Gravity: 0.6.

1.3SUBMITTALS

  1. Product Data: For the following:
  2. Specialty valves. Include pressure rating, capacity, settings, and electrical connection data of selected models.
  3. Pressure regulators. Include pressure rating, capacity, and settings of selected models.
  4. Field Test Reports: Indicate and interpret test results for compliance with performance requirements.
  5. Maintenance Data: For natural gas specialties and accessories to include in maintenance manuals specified in Division1.

1.4QUALITY ASSURANCE

  1. ANSIStandard: Comply with ANSIZ223.1, "National Fuel Gas Code."
  2. FM Standard: Provide components listed in FM's "Fire Protection Approval Guide" if specified to be FM approved.
  3. UL Standard: Provide components listed in UL's "Gas and Oil Equipment Directory" if specified to be UL listed.

1.5DELIVERY, STORAGE, AND HANDLING

  1. Handling Flammable Liquids: Remove and legally dispose of liquids from drips in existing gas piping. Handle cautiously to avoid spillage and ignition. Notify fuel gas supplier. Handle flammable liquids used by Installer with proper precautions and do not leave on premises from end of one day to beginning of next day.

1.6COORDINATION

  1. Existing Utilities: Do not interrupt utilities serving facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
  2. Appliance Connector Valves:
  3. American Valve.
  4. B&K Industries, Inc.
  5. Brass Craft Manufacturing Co.
  6. Cimberio Valves, S. p. A.
  7. Conbraco Industries, Inc.; Apollo Div.
  8. E. M. Plastic and Electric Products, Ltd.; Neo Valve Div.
  9. Frey: John M. Frey Co.
  10. Jomar International, Ltd.
  11. Key Gas Components, Inc.
  12. Legend Valve and Fitting, Inc.
  13. McDonald: A. Y. McDonald Mfg. Co.
  14. Mueller Co.; Mueller Gas Products Div.
  15. Newman Hattersley, Ltd.; Specialty Valve Div.
  16. Robert Manufacturing Co.
  17. State Metals, Inc.
  18. Watts Industries, Inc.; Water Products Div.
  19. Gas Valves, NPS2 and Smaller:
  20. BMI Canada, Inc.
  21. Crane Valves.
  22. Dungs: Karl Dungs, Inc.
  23. Flow Control Equipment, Inc.
  24. Grinnell Corp.
  25. Honeywell, Inc.
  26. Jomar International, Ltd.
  27. Kitz Corp. of America.
  28. Legend Valve and Fitting, Inc.
  29. Lyall: R. W. Lyall & Co., Inc.
  30. McDonald: A. Y. McDonald Mfg. Co.
  31. Milwaukee Valve Co., Inc.
  32. Mueller Co.; Mueller Gas Products Div.
  33. Nibco, Inc.
  34. Red-White Valve Corp.
  35. Velan Valve Corp.
  36. Watts Industries, Inc.; Water Products Div.
  37. Plug Valves, NPS2-1/2 and Larger:
  38. Flow Control Equipment, Inc.
  39. Milliken Valve Co., Inc.
  40. Nordstrom Valves, Inc.
  41. Olson Technologies, Inc.; Homestead Valve Div.
  42. Walworth Co.
  43. Electrically Operated Gas Valves:
  44. ASCO General Controls.
  45. Atkomatic Valve Co., Inc.
  46. Automatic Switch Co.
  47. Dungs: Karl Dungs, Inc.
  48. Eclipse Combustion Inc.
  49. Goyen Valve Corp.
  50. Magnatrol Valve Corp.
  51. Parker Hannifin Corp.; Climate & Industrial Controls Group; Skinner Valve Div.
  52. Line Pressure Regulators:
  53. American Meter Co.
  54. Donkin: Bryan Donkin RMG Canada, Ltd.
  55. Eclipse Combustion, Inc.
  56. Equimeter, Inc.
  57. Fisher Controls International, Inc.
  58. Maxitrol Co.
  59. National Meter.
  60. Richards Industries, Inc.; Jordan Valve Div.
  61. Schlumberger Industries; Gas Div.
  62. Appliance Pressure Regulators:
  63. Canadian Meter Co., Inc.
  64. Eaton Corp.; Controls Div.
  65. Harper Wyman Co.
  66. Maxitrol Co.
  67. SCP, Inc.

2.2PIPING MATERIALS

  1. Refer to Part3 "Piping Applications" Article for applications of pipe, tube, fitting, and joining materials.

2.3PIPES, TUBES, FITTINGS, AND JOINING MATERIALS

  1. Steel Pipe: ASTMA53; TypeE orS; GradeB; Schedule40; black.
  2. Malleable-Iron Threaded Fittings: ASMEB16.3, Class150, standard pattern, with threaded ends according to ASMEB1.20.1.
  3. Unions: ASMEB16.39, Class150, malleable iron with brass-to-iron seat, ground joint, and threaded ends according to ASMEB1.20.1.
  4. Cast-Iron Flanges and Flanged Fittings: ASMEB16.1, Class125.
  5. Steel Welding Fittings: ASMEB16.9, wrought steel or ASMEB16.11, forged steel.
  6. Steel Threaded Fittings: ASMEB16.11, forged steel with threaded ends according to ASMEB1.20.1.
  7. Joint Compound and Tape: Suitable for natural gas.
  8. Steel Flanges and Flanged Fittings: ASMEB16.5.
  9. Gasket Material: Thickness, material, and type suitable for natural gas.
  10. Transition Fittings: Type, material, and end connections to match piping being joined.
  11. Common Joining Materials: Refer to Division15 Section "Basic Mechanical Materials and Methods" for joining materials not in this Section.

2.4PROTECTIVE COATING

  1. Furnish pipe and fittings with factory-applied, corrosion-resistant polyethylene coating for use in corrosive atmosphere.

2.5PIPING SPECIALTIES

  1. Flexible Connectors: ANSIZ21.24, copper alloy.
  2. Quick-Disconnect Devices: ANSIZ21.41, convenience outlets and matching plug connector.

2.6SPECIALTY VALVES

  1. Valves, NPS2 and Smaller: Threaded ends according to ASMEB1.20.1 for pipe threads.
  2. Valves, NPS2-1/2 and Larger: Flanged ends according to ASMEB16.5 for steel flanges and according to ASMEB16.24 for copper and copper-alloy flanges.
  3. Appliance Connector Valves: ANSIZ21.15 and IAS listed.
  4. Gas Stops: Bronze body with AGA stamp, plug type with bronze plug and flat or square head, ball type with chrome-plated brass ball and lever handle, or butterfly valve with stainless-steel disc and fluorocarbon elastomer seal and lever handle; 2-psig minimum pressure rating.
  5. Gas Valves, NPS2 and Smaller: ASMEB16.33 and IAS-listed bronze body and 125-psig pressure rating.
  6. Plug Valves, NPS2-1/2 and Larger: ASMEB16.38 and MSSSP-78 cast-iron, lubricated plug valves, with 125-psig pressure rating.
  7. Electrically Operated Gas Valves: UL429, bronze, aluminum, or cast-iron body solenoid valve; 120-V ac, 60Hz, ClassB, continuous-duty molded coil. Include NEMAISC6, Type4, coil enclosure and electrically opened and closed dual coils. Valve position shall normally be closed.

2.7PRESSURE REGULATORS

  1. Description: Single stage and suitable for fuel gas service. Include steel jacket and corrosion-resistant components, elevation compensator, and atmospheric vent.
  2. NPS2 and Smaller: Threaded ends according to ASMEB1.20.1 for pipe threads.
  3. NPS2-1/2 and Larger: Flanged ends according to ASMEB16.5 for steel flanges and according to ASMEB16.24 for copper and copper-alloy flanges.
  4. Line Pressure Regulators: ANSIZ21.80 To suit inlet pressure and outlet pressure requirements.
  5. Pressure Regulator Vents: Factory- or field-installed, corrosion-resistant screen in opening if not connected to vent piping.

PART 3 - EXECUTION

3.1PREPARATION

  1. Close equipment shutoff valves before turning off fuel gas to premises or section of piping. Perform leakage test as specified in "Field Quality Control" Article to determine that all equipment is turned off in affected piping section.
  2. Comply with ANSIZ223.1, Paragraph "Prevention of Accidental Ignition".

3.2SERVICE ENTRANCE PIPING

  1. Extend fuel gas piping and connect to fuel gas distribution for service entrance to building.
  2. Exterior fuel gas distribution system piping, service pressure regulator, and service meter will be provided by gas utility.
  3. Install dielectric fitting downstream from and adjacent to each service meter unless meter is supported from service-meter bar with integral dielectric fitting. Install shutoff valve downstream from and adjacent to dielectric fitting. Refer to Division15 Section "Basic Mechanical Materials and Methods" for dielectric fittings.

3.3PIPING APPLICATIONS

  1. Flanges, unions, transition, and special fittings with pressure ratings same as or higher than system pressure rating may be used in applications below, unless otherwise indicated.
  2. Fuel Gas Piping, 5.0 psig or Less: Use the following:
  3. NPS1/2 and Smaller: Steel pipe, malleable-iron threaded fittings, and threaded joints.
  4. NPS3/4 through NPS 3: Steel pipe, malleable-iron threaded fittings, and threaded joints.
  5. Larger Than NPS3: Steel pipe, steel welding fittings, and welded joints.
  6. Fuel Gas Piping, Greater than 5.0 psig: Use the following:
  7. NPS1/2 and Smaller: NPS 1/2 steel pipe, malleable-iron threaded fittings, and threaded joints.
  8. Larger Than NPS 1/2: Steel pipe, steel welding fittings, and welded joints.
  9. Underground Fuel Gas Piping: Steel pipe, steel welding fittings, and welded joints. Encase in containment conduit.
  10. Containment Conduits: Steel pipe, steel welding fittings, and welded joints.
  11. Gas Service Piping at Meters and Regulators, Above 5.0 psig Steel pipe, steel welding fittings, and welded joints.

3.4VALVE APPLICATIONS

  1. Appliance Shutoff Valves for Pressure 0.5 psig or Less: Appliance connector valve or gas stop.
  2. Appliance Shutoff Valves for Pressure 0.5 to 2 psig: Gas stop or gas valve.
  3. Appliance Shutoff Valves for Pressure 2 to 15 psig: Gas valve.
  4. Piping Line Valves, NPS2 and Smaller: Gas valve.
  5. Piping Line Valves, NPS2-1/2 and Larger: Plug valve.
  6. Valves at Service Meter, NPS2 and Smaller: Gas valve.
  7. Valves at Service Meter, NPS2-1/2 and Larger: Plug valve.

3.5PIPING INSTALLATION

  1. Refer to Division15 Section "Basic Mechanical Materials and Methods" for basic piping installation requirements.
  2. Concealed Locations: Except as specified below, install concealed gas piping in airtight conduit constructed of Schedule40, seamless, black steel pipe with welded joints. Vent conduit to outside and terminate with screened vent cap.
  3. Above-Ceiling Locations: Gas piping may be installed in accessible spaces, subject to approval of authorities having jurisdiction, whether or not such spaces are used as plenums. Do not locate valves above ceilings.
  4. In Floors: Gas piping with welded joints and protective wrapping specified in "Protective Coating" Article in Part2 may be installed in floors, subject to approval of authorities having jurisdiction. Surround piping cast in concrete slabs with minimum of 1-1/2 inches of concrete. Piping may not be in physical contact with other metallic structures such as reinforcing rods or electrically neutral conductors. Do not embed piping in concrete slabs containing quick-set additives or cinder aggregate.
  5. In Floor Channels: Gas piping may be installed in floor channels, subject to approval of authorities having jurisdiction. Channels must have cover and be open to space above cover for ventilation.
  6. In Partitions: Do not install concealed piping in solid partitions.
  7. Prohibited Locations: Do not install gas piping in or through circulating air ducts, chimneys or gas vents (flues), ventilating ducts, or elevator shafts.
  8. Drips and Sediment Traps: Install drips at points where condensate may collect. Include outlets of service meters. Locate where readily accessible for cleaning and emptying. Do not install where condensate would be subject to freezing.
  9. Construct drips and sediment traps using tee fitting with bottom outlet plugged or capped. Use minimum-length nipple of 3 pipe diameters, but not less than 3 inches long, and same size as connected pipe. Install with space between bottom of drip and floor for removal of plug or cap.
  10. Install fuel gas piping at uniform grade of 0.1 percent slope upward toward risers.
  11. Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level side down.
  12. Connect branch piping from top or side of horizontal piping.
  13. Install unions in pipes NPS2 and smaller, adjacent to each valve, at final connection to each piece of equipment, and elsewhere as indicated. Unions are not required on flanged devices.
  14. Install strainer on inlet of each line pressure regulator and automatic and electrically operated valve.
  15. Install flanges on valves, specialties, and equipment having NPS2-1/2 and larger connections.
  16. Install vent piping for gas pressure regulators and gas trains, extend outside building, and vent to atmosphere. Terminate vents with turned-down, reducing-elbow fittings with corrosion-resistant insect screens in large end.
  17. Install containment conduits for gas piping below slabs, within building, in gastight conduits extending minimum of 4 inches outside building, and vented to atmosphere. Terminate vents with turned-down, reducing-elbow fittings with corrosion-resistant insect screens in large end. Prepare and paint outside of conduits with coal-tar, epoxy-polyamide paint according to SSPC-Paint16.

3.6JOINT CONSTRUCTION

  1. Refer to Division15 Section "Basic Mechanical Materials and Methods" for basic piping joint construction.
  2. Use materials suitable for fuel gas.

3.7HANGER AND SUPPORT INSTALLATION

  1. Refer to Division15 Section "Hangers and Supports" for pipe hanger and support devices.
  2. Install hangers for horizontal steel piping with the following maximum spacing and minimum rod sizes:
  3. NPS1 and Smaller: Maximum span, 96 inches minimum rod size, 3/8 inch
  4. NPS1-1/4: Maximum span, 108 inches minimum rod size, 3/8 inch
  5. NPS1-1/2 and NPS2: Maximum span, 108 inches minimum rod size, 3/8 inch
  6. NPS2-1/2 to NPS3-1/2: Maximum span, 10 feet minimum rod size, 1/2 inch
  7. NPS4 and Larger: Maximum span, 10 feet minimum rod size, 5/8 inch

3.8CONNECTIONS

  1. Drawings indicate general arrangement of fuel gas piping, fittings, and specialties.
  2. Install piping adjacent to appliances to allow service and maintenance.
  3. Connect piping to appliances using gas with shutoff valves and unions. Install valve upstream from and within 72 inches of each appliance. Install union downstream from valve.
  4. Sediment Traps: Install tee fitting with capped nipple in bottom to form drip, as close as practical to inlet of each appliance using gas.
  5. Ground equipment.
  6. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL486A and UL486B.
  7. Do not use gas pipe as grounding electrode.

3.9PAINTING

  1. Use materials and procedures in Division9 Section "Painting," "Exterior Paint Schedule" Article, "Ferrous Metal" Paragraph, "Full-Gloss, Alkyd-Enamel Finish" Subparagraph.
  1. Paint exterior service meters, pressure regulators, and specialty valves.

3.10FIELD QUALITY CONTROL

  1. Inspect, test, and purge piping according to ANSIZ223.1, Part4 "Inspection, Testing, and Purging," and requirements of authorities having jurisdiction.
  1. Repair leaks and defects with new materials and retest system until satisfactory results are obtained.
  1. Report test results promptly and in writing to Architect and authorities having jurisdiction.
  2. Verify capacities and pressure ratings of service meters, pressure regulators, valves, and specialties.
  3. Verify correct pressure settings for pressure regulators.
  4. Verify that specified piping tests are complete.

3.11ADJUSTING

  1. Adjust controls and safety devices. Replace damaged and malfunctioning controls and safety devices.

END OF SECTION

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Revision Date: 12/17/04 Project & Bid Package

File name:15194FuelGasPiping.doc