Copyright 2016 AIAMasterSpec Full Length09/16

PRODUCT MASTERSPEC LICENSED BY AVITRU, LLC TO VIEGA LLC.

Copyright 2016 by The American Institute of Architects (AIA)

Exclusively published and distributed by AVITRU, LLC for the AIA

This Product MasterSpec Section is licensed by AVITRU, LLC to Viega LLC ("Licensee").

This Product MasterSpec Section modifies the original MasterSpec text, and does not include the full content of the original MasterSpec Section.

Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by, or representative of the opinions of, Avitru or The American Institute of Architects (AIA). Neither AIA nor Avitru are liable in any way for such revisions or for the use of this Product MasterSpec Section by any end user. A qualified design professional should review and edit the document to suit project requirements.

For more information, contact Viega LLC, 12303 Airport Way, Suite 395, Broomfield, CO 80021; Phone: (800) 976-9819; Fax: (800) 976-9817; Website: Email: .

For information about MasterSpec, contact Avitru at (800) 424-5080 or visit avitru.com.

SECTION 231123 - FACILITY NATURAL-GAS PIPING

TIPS:

To view non-printing Editor's Notes that provide guidance for editing, click on MasterWorks/SingleFile Formatting/Toggle/Editor's Notes.

To read detailed research, technical information about products and materials, and coordination checklists, click on MasterWorks/Supporting Information.

Revise this Section by deleting and inserting text to meet Project-specific requirements.

This Section uses the term "Architect." Change this term to match that used to identify the design professional as defined in the General and Supplementary Conditions.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1RELATED DOCUMENTS

Retain or delete this article in all Sections of Project Manual.

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.

1.2SUMMARY

  1. Section Includes:
  2. Pipes, tubes, and fittings.
  3. Piping specialties.
  4. Piping and tubing joining materials.
  5. Manual gas shutoff valves.
  6. Motorized gas valves.
  7. Earthquake valves.
  8. Pressure regulators.
  9. Service meters.
  10. Dielectric fittings.

1.3DEFINITIONS

Retain definitions remaining after this Section has been edited.

  1. Finished Spaces: Spaces other than mechanical and electrical equipment rooms, furred spaces, pipe and duct shafts, unheated spaces immediately below roof, spaces above ceilings, unexcavated spaces, crawlspaces, and tunnels.
  2. Exposed, Interior Installations: Exposed to view indoors. Examples include finished occupied spaces and mechanical equipment rooms.
  3. Exposed, Exterior Installations: Exposed to view outdoors or subject to outdoor ambient temperatures and weather conditions. Examples include rooftop locations.

1.4ACTION SUBMITTALS

  1. Product Data: For each type of the following:
  2. Piping specialties.
  3. Corrugated, stainlesssteel tubing with associated components.
  4. Valves. Include pressure rating, capacity, settings, and electrical connection data of selected models.
  5. Pressure regulators. Indicate pressure ratings and capacities.
  6. Service meters. Indicate[pressure ratings and] capacities. Include [bypass fittings] [bypass fittings and meter bars] [meter bars] [supports].
  7. Dielectric fittings.
  8. Shop Drawings: For facility natural-gas piping layout. Include plans, piping layout and elevations, sections, and details for fabrication of pipe anchors, hangers, supports for multiple pipes, alignment guides, expansion joints and loops, and attachments of the same to building structure. Detail location of anchors, alignment guides, and expansion joints and loops.
  9. Shop Drawing Scale: [1/4 inch per foot (1:50)] <Insert scale>.

Retain service meter assembly option in subparagraph below if Contractor installs service meter.

  1. Detail mounting, supports, and valve arrangements for[service meter assembly and] pressure regulator assembly.

Paragraph below is defined in Section013300 "Submittal Procedures" as a "Delegated-Design Submittal." Retain if Work of this Section is required to withstand specific design loads and design responsibilities have been delegated to Contractor or if structural data are required as another way to verify compliance with performance requirements. Professional engineer qualifications are specified in Section014000 "Quality Requirements."

  1. Delegated-Design Submittal: For natural-gas piping and equipment indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.
  2. Detail fabrication and assembly of seismic restraints.
  3. Design Calculations: Calculate requirements for selecting seismic restraints.

1.5INFORMATIONAL SUBMITTALS

Retain first paragraph below if Drawings do not include detailed plans or if Project involves unusual coordination requirements.

  1. Coordination Drawings: Plans and details, drawn to scale, on which natural-gas piping is shown and coordinated with other installations, using input from installers of the items involved.

Retain first paragraph below if retaining "Project Conditions" Article.

  1. Site Survey: Plans, drawn to scale, on which natural-gas piping is shown and coordinated with other services and utilities.

Coordinate first paragraph below with qualification requirements in Section014000 "Quality Requirements" and as supplemented in "Quality Assurance" Article.

  1. Qualification Data: For qualified professional engineer.

Retain first paragraph below if retaining procedures for welder certification in "Quality Assurance" Article.

  1. Welding certificates.
  2. Field quality-control reports.

1.6CLOSEOUT SUBMITTALS

  1. Operation and Maintenance Data: For [motorized gas valves] [pressure regulators] [and] [service meters] to include in emergency, operation, and maintenance manuals.

1.7QUALITY ASSURANCE

  1. Installer Qualification:
  2. Press-Connect Joining Procedure for Copper Tubing: Qualify operators according to training provided by Viega; Plumbing and Heating Systems.
  3. Press-Connect Joining Procedure for Steel Piping. Qualify operators according to training provided by Viega; Plumbing and Heating Systems.

Retain one or both of first two paragraphs below for welding supports. Retain first for welded piping supports and retain second for welded steel pipe joints. If retaining, also retain "Welding certificates" Paragraph in "Informational Submittals" Article.

  1. Steel Support Welding Qualifications: Qualify procedures and personnel according to AWSD1.1/D1.1M, "Structural Welding Code - Steel."
  2. Pipe Welding Qualifications: Qualify procedures and operators according to ASME Boiler and Pressure Vessel Code.
  3. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA70, by a qualified testing agency, and marked for intended location and application.

1.8DELIVERY, STORAGE, AND HANDLING

Retain first paragraph below for projects involving existing systems.

  1. Handling Flammable Liquids: Remove and dispose of liquids from existing natural-gas piping according to requirements of authorities having jurisdiction.
  2. Deliver pipes and tubes with factory-applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe end damage and to prevent entrance of dirt, debris, and moisture.
  3. Store and handle pipes and tubes having factory-applied protective coatings to avoid damaging coating, and protect from direct sunlight.
  4. Protect stored PE pipes and valves from direct sunlight.

1.9PROJECT CONDITIONS

Retain this article for outdoor piping and if Contractor is required to provide survey.

  1. Perform site survey, research public utility records, and verify existing utility locations. Contact utility-locating service for area where Project is located.

Retain first paragraph below if interruption of existing natural-gas service is required.

  1. Interruption of Existing Natural-Gas Service: Do not interrupt natural-gas service to facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide purging and startup of natural-gas supply according to requirements indicated:
  2. Notify [Architect] [Construction Manager] [Owner] no fewer than [two] <Insert number> days in advance of proposed interruption of natural-gas service.
  3. Do not proceed with interruption of natural-gas service without [Architect's] [Construction Manager's] [Owner's] written permission.

1.10COORDINATION

  1. Coordinate sizes and locations of concrete bases with actual equipment provided.
  2. Coordinate requirements for access panels and doors for valves installed concealed behind finished surfaces. Comply with requirements in Section083113 "Access Doors and Frames."

1.11WARRANTY

When warranties are required, verify with Owner's counsel that warranties stated in this article are not less than remedies available to Owner under prevailing local laws.

  1. Special Limited Warranty: Viega LLC warrants to wholesalers, and licensed plumbing and mechanical contractors in the United States and Canada, that its fittings, when properly installed in nonindustrial and non-marine applications and under normal conditions of use, will be free of failure from manufacturing defect for the following component warranty periods:
  2. Warranty Period for ProPress Fittings: 50 years from date of Substantial Completion.
  3. Warranty Period for ProPress Valves: Two years from date of Substantial Completion.
  4. Warranty Period for MegaPress Fittings: 10 years from date of Substantial Completion.

PART 2 - PRODUCTS

Manufacturers and products listed in SpecAgent and MasterWorks Paragraph Builder are neither recommended nor endorsed by the AIA or Avitru. Before inserting names, verify that products listed there comply with requirements retained or revised in descriptions and are both available and suitable for the intended applications. For definitions of terms and requirements for Contractor's product selection, see Section016000 "Product Requirements."

2.1PERFORMANCE REQUIREMENTS

  1. Minimum Operating-Pressure Ratings:

Revise pressure ratings in three subparagraphs below to suit Project. Ratings must be at least one and one-half times the system's operating pressure. Verify requirements with authorities having jurisdiction. Line pressure is usually less than 65 psig (450 kPa).

  1. Piping and Valves: [100 psig (690 kPa)] <Insert value> minimum unless otherwise indicated.
  2. Service Regulators: [65 psig (450 kPa)] [100 psig (690 kPa)] <Insert value> minimum unless otherwise indicated.

Pressure at meter, if downstream from regulator, should be 5 psig (34.5 kPa) or lower for most applications. Pressure for industrial applications may be 100 psig (690 kPa) or higher, but these industrial applications are not addressed in the scope of this Section. If service meters and regulators with more than one pressure rating are required, indicate location of each on Drawings along with their outlet pressure setting.

  1. Minimum Operating Pressure of Service Meter: [5 psig (34.5 kPa)] [10 psig (69 kPa)] [20 psig (138 kPa)] [65 psig (450 kPa)] <Insert value>.

Retain one of first four paragraphs below. NFPA54 limits the pressure for natural gas in buildings to maximum 5 psig (34.5 kPa) unless specific construction details are followed, such as all welded piping, and venting pipe chases to outside.

  1. Natural-Gas System Pressure within Buildings: [0.5 psig (3.45 kPa) or less] [More than 0.5 psig (3.45 kPa) but not more than 2 psig (13.8 kPa)] [More than 2 psig (13.8 kPa) but not more than 5 psig (34.5 kPa)] <Insert pressure range>.
  2. Natural-Gas System Pressures within Buildings: Two pressure ranges. Primary pressure is more than 0.5 psig (3.45 kPa) but not more than 2 psig (13.8 kPa), and is reduced to secondary pressure of 0.5 psig (3.45 kPa) or less.
  3. Natural-Gas System Pressures within Buildings: Two pressure ranges. Primary pressure is more than 2 psig (13.8 kPa) but not more than 5 psig (34.5 kPa), and is reduced to secondary pressure of more than 0.5 psig (3.45 kPa) but not more than 2 psig (13.8 kPa).
  4. Natural-Gas System Pressures within Buildings: Three pressure ranges. Primary pressure is more than 2 psig (13.8 kPa) but not more than 5 psig (34.5 kPa), and is reduced to secondary pressures of more than 0.5 psig (3.45 kPa) but not more than 2 psig (13.8 kPa), and is reduced again to pressures of 0.5 psig (3.45 kPa) or less.
  5. Delegated Design: Design restraints and anchors for natural-gas piping and equipment, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated.

2.2PIPES, TUBES, AND FITTINGS

This article includes examples of materials listed in NFPA54, "National Fuel Gas Code"; and the International Fuel Gas Code, which has been jointly adopted by AGA and ICC. Coordinate piping materials in this article with piping schedules in Part3. See "Writing Guide" Article in the Evaluations for a discussion of how this Section is organized and the most efficient way to edit this Section.

See Part3 piping schedule articles to determine where pipes, tubes, fittings, and joining materials are applied in various services.

  1. Steel Pipe: ASTMA53/A53M, black steel, Schedule40, TypeE or S, GradeB.
  2. Malleable-Iron Threaded Fittings: ASMEB16.3, Class150, standard pattern.
  3. Wrought-Steel Welding Fittings: ASTMA234/A234M for butt welding and socket welding.
  4. Steel Press-Connect Fittings: CSALC-4, 125-psig(860-kPa) pressure rating.
  5. Press Ends: Unpressed fitting identification feature to the fitting wall.
  6. Pipe Threads: ASMEB1.20.1.
  7. Sealing Elements: HNBR.
  8. Tools: Manufacturer's recommended tools, jaws, rings, and actuators.
  9. Unions: ASMEB16.39, Class150, malleable iron with brass-to-iron seat, ground joint, and threaded ends.
  10. Forged-Steel Flanges and Flanged Fittings: ASMEB16.5, minimum Class150, including bolts, nuts, and gaskets of the following material group, end connections, and facings:
  11. Material Group: 1.1.
  12. End Connections: Threaded or butt welding to match pipe.
  13. Lapped Face: Not permitted underground.
  14. Gasket Materials: ASMEB16.20, metallic, flat, asbestos free, aluminum o-rings, and spiral-wound metal gaskets.
  15. Bolts and Nuts: ASMEB18.2.1, carbon steel aboveground and stainless steel underground.

Retain first subparagraph below for underground steel piping. Cathodic protection may be required in addition to protective coating. Coordinate with requirements in Section134700 "Cathodic Protection."

  1. Protective Coating for Underground Piping: Factory-applied, three-layer coating of epoxy, adhesive, and PE.
  2. Joint Cover Kits: Epoxy paint, adhesive, and heat-shrink PE sleeves.

Verify acceptability of couplings in subparagraph below with authorities having jurisdiction before retaining. These couplings are available in NPS1 (DN25) and larger.

  1. Mechanical Couplings:

Retain "Manufacturers" Subparagraph below and list of manufacturers to require products from manufacturers listed or a comparable product from other manufacturers.

  1. Manufacturers: Subject to compliance with requirements, provide products by the following:

1)GE Oil & Gas.

2)Smith-Blair, Inc.

3)Insert manufacturer's name>.

  1. [Stainlesssteel] [Steel] flanges and tube with epoxy finish.
  2. Buna-nitrile seals.
  3. [Stainlesssteel] [Steel] bolts, washers, and nuts.
  4. Coupling shall be capable of joining PE pipe to PE pipe, steel pipe to PE pipe, or steel pipe to steel pipe.
  5. Steel body couplings installed underground on plastic pipe shall be factory equipped with anode.

Tubing in first paragraph below is limited in application to 0.5 psig (3.45 kPa) and less and NPS1 (DN25) and smaller. Verify acceptability with authorities having jurisdiction before retaining.

  1. Corrugated, StainlessSteel Tubing: Comply with ANSI/IASLC1.

Retain "Manufacturers" Subparagraph below and list of manufacturers to require products from manufacturers listed or a comparable product from other manufacturers.

  1. Manufacturers: Subject to compliance with requirements, provide products by the following:
  2. FlashShield Products; Gastite, a division of Titeflex Corp.
  3. OmegaFlex, Inc.
  4. Parker Hannifin Corporation.
  5. Tru-Flex Metal Hose Corp.
  6. Ward Manufacturing LLC.
  7. Insert manufacturer's name>.
  8. Tubing: ASTMA240/A240M, corrugated, Series 300 stainless steel.
  9. Coating: PE with flame retardant.
  10. Surface-Burning Characteristics: As determined by testing identical products according to ASTME84 by a qualified testing agency. Identify products with appropriate markings of applicable testing agency.

1)Flame-Spread Index: [25] <Insert value> or less.

2)Smoke-Developed Index: [50] [450] <Insert value> or less.

  1. Fittings: Copper-alloy mechanical fittings with ends made to fit and listed for use with corrugated stainlesssteel tubing and capable of metal-to-metal seal without gaskets. Include brazing socket or threaded ends complying with ASMEB1.20.1.
  2. Striker Plates: Steel, designed to protect tubing from penetrations.
  3. Manifolds: Malleable iron or steel with factory-applied protective coating. Threaded connections shall comply with ASMEB1.20.1 for pipe inlet and corrugated tubing outlets.
  4. Operating-Pressure Rating: 5 psig (34.5 kPa).

Verify acceptability of tubing in first paragraph below with authorities having jurisdiction before retaining.

  1. Aluminum Tubing: Comply with ASTMB210 and ASTMB241/B241M.
  2. Aluminum Alloy: Alloy5456 is prohibited.
  3. Protective Coating: Factory-applied coating capable of resisting corrosion on tubing in contact with masonry, plaster, insulation, water, detergents, and sewerage.
  4. Flare Fittings: Comply with ASMEB16.26 and SAEJ513.
  5. Copper-alloy fittings.
  6. Metal-to-metal compression seal without gasket.
  7. Dryseal threads shall comply with ASMEB1.20.3.

Do not use copper tubes in first two paragraphs below if natural gas contains more than 0.3 grains of hydrogen sulfide/100 cu.ft. (0.7 mg/100L) of gas.

CSAB149.1 allows the use of ASTMB837 copper tubing, which defines "TypeG."

  1. Drawn-Temper Copper Tube: Comply with [ASTMB88, TypeK (ASTMB88M, TypeA)] [ASTMB88, TypeL (ASTMB88M, TypeB)] [ASTMB837, TypeG].
  2. Copper Fittings: ASMEB16.22, wrought copper, and streamlined pattern.
  3. Copper or Bronze Press-Connect Fittings: CSALC-4, 125psig(860 kPa) pressure rating.
  4. Press Ends: Unpressed fitting identification feature to the fitting wall.
  5. Sealing Element: HNBR.
  6. Bronze Flanges and Flanged Fittings: ASMEB16.24, Class150.
  7. Gasket Material: ASMEB16.20, metallic, flat, asbestos free, aluminum o-rings, and spiral-wound metal gaskets.
  8. Bolts and Nuts: ASMEB18.2.1, carbon steel or stainless steel.

Retain subparagraph below for underground copper tubing. Cathodic protection may be required in addition to protective coating. Coordinate with requirements in Section134700 "Cathodic Protection."

  1. Protective Coating for Underground Tubing: Factory-applied, extruded PE a minimum of 0.022 inch (0.56 mm) thick.

In first paragraph below, CSAB149.1 allows the use of ASTMB837 copper tubing, which defines "TypeG."