33 51 15.docx

UFGS-33 51 15 (February 2016)

UNIFIED FACILITIES GUIDE SPECIFICATIONS

References are in agreement with UMRL dated April 2024

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 51 15

NATURAL-GAS / LIQUEFIED PETROLEUM GAS DISTRIBUTION PIPELINES

08/19

Installation

Smaller

SECTION 33 51 15 Page 1

[Natural][Manufactured] Gas Systems

Pipelines

Pipelines

Greater than 414 kPa60 psig, but Less than 862 kPa125 psig

2.6.5 Overpressure Protection for Service Lines, Operating Pressure Greater than 862 kPa125 psig

Meter Reading Interfaces

SECTION 33 51 15 Page 2

-- End of Section Table of Contents --

SECTION 33 51 15 Page 3

UFGS-33 51 15 (February 2016)

UNIFIED FACILITIES GUIDE SPECIFICATIONS

References are in agreement with UMRL dated April 2024

SECTION 33 51 15

NATURAL-GAS / LIQUEFIED PETROLEUM GAS DISTRIBUTION PIPELINES

08/19 NOTE: This guide specification provides requirements for distribution pipelines that convey natural gas, manufactured gas, or Liquefied Petroleum Gas (LPG) in the vapor phase in order to comply with the regulations written in 49 CFR 192.

LPG vapor distribution pipelines must additionally comply with the requirements of NFPA 58, as is required by 49 CFR 192.

Where LPG tanks have remote filling piping system that can contain LPG in the liquid phase, please refer to UFC 4-60-01, Design: Petroleum Fuel Facilities, for required design elements.

Gas piping that serves a building, downstream from the 49 CFR 192 pipeline, is to be specified in Section 23 11 20 FACILITY GAS PIPING, and must be designed in accordance with NFPA 54.

LPG piping and storage tank that serves a single building are to be specified in Section 23 11 20 FACILITY GAS PIPING and must be designed in accordance with NFPA 58 and NFPA 54.

Adhere to UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Standard when editing this guide specification or preparing new project specification sections. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable item(s) or insert appropriate information.

Remove information and requirements not required in respective project, whether or not brackets are present.

Comments, suggestions and recommended changes for this guide specification are welcome and should be SECTION 33 51 15 Page 4 submitted as a Criteria Change Request (CCR).

PART 1 GENERAL

NOTE: This guide specification may be used for specifying liquefied petroleum gas (LPG) if the following modifications are made:

a. Delete all references to fiberglass and add the following to paragraph "Polyethylene Pipe, Tubing, Fittings and Joints" in PART 2: Polyethylene pipe, tubing, and fittings are recommended by the manufacturer for use with LPG.

b. Require, where applicable, the LPG distribution system to be in accordance with NFPA 58, Storage and Handling of Liquefied Petroleum Gases, instead of

ASME B31.8.

1.1 SUMMARY

Note: The gas service connections to the gas main and to Building 120 is not included in this contract. The tie-in connections, regulator and meter will be purchased and installed by National Grid in coordination with WVA.

The gas distribution pipeline includes piping that conveys [natural gas] [manufactured gas] [liquefied petroleum gas (LPG) in its vapor phase] and all appurtenances from point of connection with existing system, to a point approximately [1500] [_____] mm [5] [_____] feet from the facility being served. The distribution pipeline, which must comply with 49 CFR 192, terminates at the isolation valve, service pressure regulator, or meter, whichever is the most downstream component before serving the facility gas piping. The facility gas piping that connects to this termination point is specified in Section 23 11 20 FACILITY GAS PIPING and must comply with NFPA 54.

Section 31 10 00 SITE CLEARING, applies to this section unless otherwise specified.

1.2 REFERENCES

NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.

Use the Reference Wizard's Check Reference feature when you add a Reference Identifier (RID) outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates.

References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.

SECTION 33 51 15 Page 5

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN GAS ASSOCIATION (AGA)

AGA ANSI B109.1 (2000) Diaphragm Type Gas Displacement Meters (Under 500 cubic ft./hour Capacity) AGA ANSI B109.2 (2000) Diaphragm Type Gas Displacement Meters (500 cubic ft./hour Capacity and Over)

Gas Service

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI Z21.18/CSA 6.3 (2007; R 2017) Gas Appliance Pressure Regulators

Petroleum Liquids and Gases API RP 686 (2009) Recommended Practice for Machinery Installation and Installation Design

Errata 2 August 2018) Specification for Pipeline and Piping Valves API Std 617 (2014; 8th Ed; ERTA 1 August 2016) Axial and Centrifugal Compressors and Expander-Compressors API Std 618 (2007; R 2016) Reciprocating Compressors for Petroleum, Chemical, and Gas Industry Services API Std 619 (2010) Rotary-Type Positive Displacement Compressors for Petroleum, Petrochemical, and Natural Gas Industries

SECTION 33 51 15 Page 6

API Std 1104 (2013; Errata 1-3 2014; Addendum 1 2014;

Errata 4 2015; Addendum 2 2016) Welding of Pipeline and Related Facilities

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7-16 (2017; Errata 2018; Supp 1 2018) Minimum Design Loads and Associated Criteria for Buildings and Other Structures

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B1.20.1 (2013; R 2018) Pipe Threads, General Purpose (Inch) ASME B1.20.2M (2006; R 2011) Pipe Threads, 60 Deg.

General Purpose (Metric) ASME B16.5 (2020) Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard ASME B16.9 (2018) Factory-Made Wrought Buttwelding Fittings ASME B16.11 (2022) Forged Fittings, Socket-Welding and Threaded ASME B16.21 (2021) Nonmetallic Flat Gaskets for Pipe Flanges

Shutoffs and Valves in Gas Distribution Systems ASME B31.8 (2022; Supplement 2022) Gas Transmission and Distribution Piping Systems ASME BPVC SEC IX (2017; Errata 2018) BPVC Section IX-Welding, Brazing and Fusing Qualifications ASME BPVC SEC VIII (2010) Boiler and Pressure Vessel Codes:

Section VIII Rules for Construction of Pressure Vessel ASME BPVC SEC VIII D1 (2019) BPVC Section VIII-Rules for Construction of Pressure Vessels Division 1

Specification for Ferritic Malleable Iron Castings ASTM A53/A53M (2024) Standard Specification for Pipe, SECTION 33 51 15 Page 7

Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless ASTM A106/A106M (2019a) Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service ASTM A181/A181M (2014; R 2020) Standard Specification for Carbon Steel Forgings, for General-Purpose Piping

Ferritic Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures ASTM D2513 (2018a) Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings ASTM D2513-99 (1999) Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings ASTM D2517 (2018) Standard Specification for Reinforced Epoxy Resin Gas Pressure Pipe and Fittings

Thermoplastic Pressure Piping

PTFE Resin Skived Tape ASTM D3350 (2021) Polyethylene Plastics Pipe and Fittings Materials ASTM D3839 (2014) Standard Guide for Underground Installation of "Fiberglass" (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe ASTM D3892 (2015) Standard Practice for Packaging/Packing of Plastics

SECTION 33 51 15 Page 8

ASTM D4066 (2013) Standard Classification System for Nylon Injection and Extrusion Materials (PA) ASTM D5685 (2019) Standard Specification for "Fiberglass" (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe Fittings

Performance Testing of Excess Flow Valves

Excess Flow Valves for Natural Gas Service

Fusion Joining of Polyethylene Pipe and Fittings

Tracking and Traceability Encoding System of Natural Gas Distribution Components

SECTION 33 51 15 Page 9

(Pipe, Tubing, Fittings, Valves, and Appurtenances) ASTM F2945 (2018) Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY (MSS)

MSS SP-25 (2018) Standard Marking System for Valves, Fittings, Flanges and Unions MSS SP-142 (2012) Excess Flow Valves for Fuel Gas Service, NPS 1 1/2 through 12

Level 6)

Level 1)

Gloss Level 5

Level 6)

NACE INTERNATIONAL (NACE)

NACE SP0169 (2013) Control of External Corrosion on Underground or Submerged Metallic Piping Systems NACE SP0185 (2024) Extruded Polyolefin Resin Coating Systems with Soft Adhesives for Underground or Submerged Pipe NACE SP0274 (1974; R 2011) High Voltage Electrical Inspection of Pipeline Coatings

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

Code

SOCIETY FOR PROTECTIVE COATINGS (SSPC)

Oil Primer for Use Over Hand Cleaned Steel, Type I and Type II SSPC SP 1 (2015) Solvent Cleaning

SECTION 33 51 15 Page 10

UNDERWRITERS LABORATORIES (UL)

UL 125 (2020) UL Standard for Safety Flow Control Valves for Anhydrous Ammonia and LP-Gas UL 132 (2015; Reprint Jan 2018) UL Standard for Safety Relief Valves for Anhydrous Ammonia and LP-Gas UL 144 (2012; Reprint Nov 2014) UL Standard for Safety LP-Gas Regulators UL 569 (2013; Repring Jul 2017) UL Standard for Safety Pigtails and Flexible Hose Connectors for LP-Gas

1.3 SUBMITTALS

NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list, and corresponding submittal items in the text, to reflect only the submittals required for the project. The Guide Specification technical editors have classified those items that require Government approval, due to their complexity or criticality, with a "G." Generally, other submittal items can be reviewed by the Contractor's Quality Control System. Only add a “G” to an item, if the submittal is sufficiently important or complex in context of the project.

For Army projects, fill in the empty brackets following the "G" classification, with a code of up to three characters to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO" for District Office (Engineering Division or other organization in the District Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project Office. Codes following the "G" typically are not used for Navy and Air Force projects.

SECTION 33 51 15 Page 11

The "S" classification indicates submittals required as proof of compliance for sustainability Guiding Principles Validation or Third Party Certification and as described in Section 01 33 00 SUBMITTAL PROCEDURES.

Choose the first bracketed item for Navy and Air Force projects, or choose the second bracketed item for Army projects.

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are [for Contractor Quality Control approval.][for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.] Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings Pipe, Fittings, and Associated Materials SD-03 Product Data Materials and Equipment; G[, [_____]] Spare Parts; G[, [_____]] Pipe and Accessory Coatings; G[, [_____]] SD-05 Design Data Connections to Existing Lines; G[, [_____]] Connection and Abandonment Plan; G[, [_____]] SD-06 Test Reports Pressure and Leak Tests SD-07 Certificates Welder's training and qualifications Jointing of Plastic Piping Utility Work SD-08 Manufacturer's Instructions EFV Design and Installation Guide SD-10 Operation and Maintenance Data Gas Distribution System and Equipment Operation; G[, [_____]] Gas Distribution System Maintenance; G[, [_____]] Gas Distribution Equipment Maintenance; G[, [_____]]

SECTION 33 51 15 Page 12

a. Qualification of welding procedures and Welder's training and qualifications, including equipment used, detailed explanation of the procedure, and successfully making joints which pass tests must comply with Subpart E of 49 CFR 192.

b. Submit procedures for welding of metallic piping that comply with API Std 1104 section 5, 12, or App. A; or ASME BPVC SEC IX. Quality of test welds used to qualify a procedure must be determined by destructive test. Submit the results of destructive testing of each procedure qualification for Government record.

c. Submit a certificate of Welder's training and qualifications by test, requalification, or production work testing in conformance with API Std 1104 section 6, 12, or App. A; ASME BPVC SEC IX; or as allowed per 49 CFR 192 Appendix C.

d. Submit a list of names and identification symbols for all qualified welders and welding operators to be used on the project.

e. Weld structural members in accordance with Section 05 05 23.16 STRUCTURAL WELDING.

1.4.1.2 Jointing of Plastic Piping

a. Join piping by performance qualified plastic pipe joiners, qualified by a person who has been trained and certified by the manufacturer of the pipe, using manufacturer's pre-qualified joining procedures that have been tested in accordance with 49 CFR 192 Subpart F. Inspect joints by an inspector qualified in the joining procedures being used.

b. Submit manufacturer's pre-qualified joining procedures and the results of testing performed to 49 CFR 192 Section 283.

c. Plastic pipe joiners must be re-qualified at the beginning of each project by making specimen joints using the approve procedures and having those joints inspected by a qualified inspector and tested in accordance with 49 CFR 192 Section 285.

d. Submit a certificate of qualified jointing procedures, training procedures, qualifications of trainer, and training test results for joiners and inspectors. Notify the Contracting Officer at least [24] [_____] hours in advance of the date to qualify joiners and inspectors.

Submit shop drawings, within [30] [_____] days of contract award, containing complete schematic and piping diagrams and any other details required to demonstrate that the system has been coordinated and functions properly as a unit. Show on the drawings proposed layout and anchorage of the system and appurtenances, and equipment relationship to other parts of

SECTION 33 51 15 Page 13 the work including clearances for maintenance and operation.

1.4.2.2 Connecting and Abandonment Plan

Submit written notification of the method and schedule for making connections to existing gas lines, to the Contracting Officer at least 10 days in advance. Include gas line tie in, hot taps, abandonment/removal or demolition, purging, and plugging as applicable. ASME B31.8 may be used to help develop these plans, but the connection and abandonment must comply with 49 CFR 192. Include in submittal [connections to existing lines][connection and abandonment plan].

Inspect materials delivered to the site for damage, and store with a minimum of handling. Store materials on site in enclosures or under protective coverings. Store plastic piping under cover out of direct sunlight. Do not store materials directly on the ground. Keep inside of pipes and fittings free of dirt and debris.

1.5.2 Handling

Handle pipe and components carefully to ensure a sound, undamaged condition. Take particular care not to damage pipe coating. Repair damaged coatings to original finish. Do not place pipe or material of any kind inside another pipe or fitting after the coating has been applied, except as specified in paragraph INSTALLATION. Handle coated steel piping in accordance with its listing and the manufacturer's written procedures. Handle plastic pipe in conformance with AGA XR0603.

1.6 EXTRA MATERIALS

Submit spare parts data for each different item of equipment and material specified, after approval of the detail shop drawings and not later than [_____] months prior to the date of beneficial occupancy. Include in the data a complete list of parts and supplies, with current unit prices and source of supply.

Provide containers for LPG that meet NFPA 58 requirements and are designed, fabricated, tested, and marked in accordance with the regulations of the department of transportation (DOT), ASME BPVC SEC VIII, or API API-ASME CODE. Provide LPG containers with all appurtenances as required by NFPA 58, qualified to UL 125, to include vapor shutoff valve, liquid shutoff valve, pressure relief valve, fixed maximum liquid level gauge, filler valve, [and overfilling protection device, ][and actuated liquid withdrawal excess-flow valve]. Container appurtenances must have a minimum service pressure rating of 1.7 MPa250 psig.

]2.2 PIPE, FITTINGS, AND ASSOCIATED MATERIALS

[Provide only materials that are allowed for [natural gas][manufactured gas] by 49 CFR 192 for the specified distribution pipeline being installed.] SECTION 33 51 15 Page 14

[Provide only materials that are allowed by LPG by NFPA 58 for the specified disbribution pipeline being installed.] Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture of the products and that essentially duplicate items that have been in satisfactory use for at least 2 years prior to bid opening. Asbestos or products containing asbestos are not allowed. Provide written verification and point of contact for a supporting service organization that is, in the opinion of the Contracting Officer, reasonably convenient to the site. Mark all valves, flanges, and fittings in accordance with MSS SP-25. Submit a complete list of materials and equipment, including manufacturer's descriptive and technical literature, performance charts and curves, catalog cuts, and installation instructions, including, but not limited to the following:

a. Electrical Isolation Devices and Isolating Flange Kits.

b. Fittings

c. Piping

d. Pipe and Accessory coatings

e. Pressure Reducing Valves.

f. Meters

g. Regulators.

h. Shut-off Valves

i. Excess Flow Valve

NOTE: Delete all words in brackets when steel pipe is expected to be subjected to unusually severe conditions (including handling) such as impact stresses, seismic forces, burial beneath vehicle or railroad crossings, significant differential settlement, or underneath piers.

Provide steel piping that complies with API Spec 5L, Grade [A,] B, or X42; ASTM A53/A53M, Grade[ A or] B; ASTM A106/A106M, Grade [A][B or] C;

ASTM A333/A333M, Grade [1 or] 3. Determine minimum pipe wall thickness as specified in 49 CFR 192.105 section "Design Formula for Steel Pipe" for

NOTE: LPG piping systems covered by this specification must be designed to prevent LPG in the liquid phase from being trapped between isolation valves. NFPA 58 requires any LPG piping system that can trap liquid LPG to be rated for 2.4 MPa350 psig and to contain a hydrostatic pressure relief valve.

Provide steel piping that is approved within NFPA 58 and complies with ASTM A53/A53M, Grade [A or] B; ASTM A106/A106M, Grade [A,][B, or] C.

SECTION 33 51 15 Page 15

Provide pipe wall thickness as specified on the design drawings, but in no case less than schedule 40. Provide schedule 80 pipe where threads are to be cut in order to connect threaded valves or appurtenances.

NOTE: Delete this paragraph where steel pipe is not installed underground as neither a gas carrier pipe nor as an encasement for plastic pipe.

************************************************************************** NOTE: This paragraph must be retained where steel pipe is used to encase a plastic gas carrier pipe.

Where steel pipe installation below ground is required by design of the gas carrier pipe, or as encasement for plastic pipe, provide pipe with a [factory applied][field plant applied] polyolefin resin coating system conforming to NACE SP0185, Type A. Pipe exterior must be cleaned to a commercial grade blast cleaning finish in accordance with SSPC SP 6/NACE No.3. Apply adhesive compound to the pipe with a nominal thickness of 0.25 mm10 mils (plus or minus 10 percent). Immediately after the adhesive is applied, extrude a seamless tube of polyolefin over the adhesive to produce a bonded seamless coating, with a nominal thickness of 1.0 mm40 mils (plus or minus 10 percent) of polyolefin resin for pipes up to 400 mm16 inches in diameter. For pipes 450 mm18 inches and larger in diameter, apply a minimum thickness of 60 mils (plus or minus 10 percent) polyolefin resin.

Do not coat pipe and fittings for aboveground lines.

2.2.3.2 Cathodic Protection Systems

Provide cathodic protection system in accordance with NACE SP0169 and the applicable UFGS DIV 26 specification for the designed type of cathodic protection.

2.2.4 Steel and Malleable Iron Fittings, 40 mm1-1/2 inches and Smaller Provide steel butt-weld fittings conforming to ASME B16.9 [or threaded malleable iron fittings for [natural gas][manufactured gas] pipe conforming to ASME B16.11].

[Provide fittings for LPG piping systems that are rated for a minimum of [ 863 kPa125 psig][1725 kPa250 psig] and comply with NFPA 58. Threaded fittings must be qualified by the manufacturer for use with LPG. Use threaded fittings in an LPG pipeline only at connecting equipment and appurtenances that are provided by the manufacturer with threaded connections.]

2.2.5 Steel Fittings, 50 mm 2 inches and Larger

Provide weld neck pipe flanges and flanged fittings, including bolts, nuts, and bolt patterns in accordance with ASME B16.5, Class [150][_____]. Provide buttweld fittings in accordance with ASME B16.9.

SECTION 33 51 15 Page 16

[Provide fittings for LPG piping systems that are rated for a minimum of [ 863 kPa125 psig][1.7 MPa250 psig] and comply with NFPA 58.]

2.2.6 Steel Forged Branch Connections

Provide steel forged branch connections conforming to ASTM A181/A181M, Class 60, carbon steel.

2.2.7 Flange Gaskets

[Provide gaskets for [natural][manufactured] gas systems that are non-asbestos compressed material gaskets in accordance with ASME B16.21, 1.6 mm 1/16 inch minimum thickness, full face or self-centering flat ring type, containing aramid fibers bonded with nitrile butadiene rubber (NBR), or glass fibers bonded with polytetrafluoroethylene, suitable for maximum 315 degrees C 600 degrees F service.] [Provide gaskets for LPG systems constructed of metal or confined by metal that has a melting point above 815 degrees C1,500 degrees F and is resistant to the action of LPG and in accordance with NFPA 58.]

2.2.8 Pipe Threads

[Provide pipe threads for [natural][manufactured] gas piping conforming to ASME B1.20.2MASME B1.20.1.] [Provide only fittings manufactured for the purpose of threaded connections made in LPG piping systems. Design threaded fittings in LPG systems for no less than 250 psig operating pressure.] NOTE: Delete the paragraph below where LPG distribution systems are specified. NFPA 58 does not allow thread sealant compounds or tape to be used in LPG piping systems. Where sealing at the threads of a connection in an LPG pipeline is necessary, specify back welding of the threaded joint using minimum schedule 80 piping and 1.7 MPa 250 psig rated fittings.

Provide joint sealing compound as listed in UL FLAMMABLE & COMBUSTIBLE, Class 20 or less that is qualified for use with [natural gas] [manufactured gas].

2.2.9.2 Tape

Provide polyetrafluoroethylene tape conforming to ASTM D3308 that is qualified for use with [natural gas][manufactured gas].

2.3 PLASTIC PIPE, TUBING, FITTINGS AND JOINTS

SECTION 33 51 15 Page 17

NOTE: Before selecting plastic pipe material, contact the gas supplier for a gas analysis to determine the types of chemicals which will be in the gas to be supplied. Select suitable plastic pipe material based on the gas analysis.

Polyethylene, per ASTM D2513, is the preferred plastic pipe material. SDR-11 wall thickness is the minimum allowed on a Government Installation. SDR is the nominal pipe diameter divided by the wall thickness. Higher SDR-# means thinner wall. Lower SDR-# means thicker wall. Therefore, SDR-9 would be allowed; while SDR-13 must be disapproved.

Polyamide-11 (PA-11), per [ASTM D2513-99][ASTM F2945], may be used only to connect to existing pipelines constructed of PA-11. PA-11 plastic cannot be connected by heat fusion to any other plastic and the Government will not allow a mechanical connection for this purpose.

Reinforced epoxy resin pipe, per ASTM D2517, may be used only to connect to existing natural or manufactured gas pipelines constructed of reinforced epoxy resin pipe. Reinforced epoxy resin pipe is not qualified for use with LPG per NFPA 58.

Do not use plastic material for gas pipelines with design pressures above 690 kPa100 psig, unless the manufactured products meet the requirements specified 'Design Limitations for Plastic Pipe', Section 192.123 of 49 CFR 192.

Do not use plastic material in gas pipelines where operating temperatures may exceed the material's qualified temperature range. PE and PA-11 materials must not exceed the temperature used to determine the Hydrostatic Design Basis (HDB) that was used to calculate the design pressure of the pipeline per section 192.121 of 49 CFR 192. Reinforced epoxy resin pipelines must not exceed 66 degrees C150 degrees F.

Do not use plastic material in pipelines where operating temperature may be below -29 degrees C-20 degrees F without consulting section 192.123 of 49 CFR 192 and the manufacturer of the pipe and fittings.

2.3.1 Polyethylene Gas Pressure Pipe, Tubing, and Fittings

Provide polyethylene (PE) pipe, tubing, fittings conforming to ASTM D2513, as specified in 49 CFR 192 Appendix B and manufactured using material that complies with ASTM D3350. Pipe wall thickness must comply with the Standard Dimension Ratio, SDR-11, or lower value, meaning thicker wall. The Hydrostatic Design Basis (HDB) of the selected PE material must exceed the Maximum Allowable Operating Pressure (MAOP), at the anticipated operating temperature of the system in which it is installed. Mark pipe, SECTION 33 51 15 Page 18 tubing, and fittings as required by ASTM D2513 and with traceability code per ASTM F2897.

Provide polyethylene fittings that are constructed of polyethylene of the same material classification and SDR as the connecting pipe, and comply with ASTM D2513. Provide fittings with [butt-type fusion fittings complying with ASTM D3261][, or socket-type fusion fittings complying with ASTM D2683, or ][electrofusion-type fittings complying with ASTM F1055].

Where mechanical fittings are specified on the engineering drawings, provide mechanical fittings that comply with ASTM F1948 and are category 1 for pressure integrity, gas tightness, and provide pull-out resistance equivalent to the pipe strength.

Provide heat fusion joints complying with ASTM F2620 and the manufacturer's written procedure approved by the contracting officer. Electro fusion joints fittings must comply with ASTM F1055 and the manufacturer's written procedure approved by the contracting officer. Perform underground installations in conformance with ASTM D2774.

2.3.2 Polyamide-11 Gas Pressure Pipe, Tubing, and Fittings

NOTE: Remove this paragraph where the existing distribution system that is being connected to is not Polyamide-11 pipe. Please note that 49 CFR 192 references ASTM D2513, revision dated 1999, i.e, ASTM D2513-99 for PA-11 pipe, tube, and fittings.

This reference will remain until 49 CFR 192 recognizes ASTM F2945 as the standard for PA-11 pipe, tube, and fittings. It is recommended that a dual reference for ASTM D2513-99 and ASTM F2945 be retained until 49 CFR 192 is revised to reference

ASTM F2945.

Use PA-11 pipe to connect only to existing gas distribution pipelines that are constructed of PA-11.

Provide PA-11 pipe, tubing, fittings and joints conforming to [ ASTM D2513-99] [ASTM F2945], as specified in 49 CFR 192 Appendix B and manufactured using material that complies with ASTM D4066. Pipe wall thickness must comply with the Standard Dimension Ratio, SDR-11, or lower value, meaning thicker wall. The Hydrostatic Design Basis (HDB) of the selected PA-11 material must exceed the Maximum Allowable Operating Pressure (MAOP), at the anticipated operating temperature of the system in which it is installed. Mark pipe, tubing, and fittings as required by [ ASTM D2513-99] [ASTM F2945] with traceability code per ASTM F2897.

Provide PA-11 fittings that are constructed of PA-11 of the same material classification and SDR as the connecting pipe and comply with [ ASTM D2513-99] [ASTM F2945]. Provide [butt-type fusion fittings complying with [ASTM D2513-99] [ASTM F2945],[ Annex A2] [electro fusion-type fusion fittings complying with ASTM F2600]].

Where mechanical fittings are specified on the engineering drawings, provide mechanical fittings that comply with [ASTM F1948 for metallic mechanical fittings] [ASTM F2145 for PA-11 bodied mechanical fittings] and are category 1 for pressure integrity, gas tightness, and provide pull-out

SECTION 33 51 15 Page 19 resistance equivalent to the pipe strength.

Make heat fusion joints and electro fusion joints in accordance with the manufacturer's written procedure approved by the contracting officer. Perform underground installations in conformance with ASTM D2774.

[2.3.3 Reinforced Epoxy Resin Gas Pressure Pipe and Fittings NOTE: Remove this paragraph when specifying LPG distribution pipelines or where the existing distribution system that is being connected to is not reinforced epoxy resin pipe complying with ASTM D2517.

Use reinforced epoxy resin pipe to connect only to existing [natural gas][manufactured gas] distribution pipelines that are constructed of reinforced epoxy resin.

Provide reinforced epoxy resin pipe, tubing, fittings conforming to ASTM D2517 and as specified in 49 CFR 192 Appendix B. Minimum wall thickness must comply with engineering drawings and 49 CFR 192. Mark pipe, tubing, and fittings as required by ASTM D3892.

Provide fittings conforming to ASTM D5685.

Adhesives used to join pipe and fitting must comply with ASTM D2517 and the manufacturer's written procedure approved by the contracting officer. Perform underground installations in conformance with ASTM D3839.

]2.3.4 Mechanical Fittings for use with Plastic Pipe Use of mechanical fittings in distribution pipelines constructed of plastic requires the approval of Engineering and the Contracting Officer. Mechanical fittings may be approved only where others methods of connecting piping and appurtenances will produce a less reliable gas tight connection.

Mechanical fittings, their use, and installation must comply with 49 CFR 192. Mechanical fittings must meet the requirements of category 1 presented in [ASTM F1948 for metallic mechanical fittings] [, or ASTM F2145 for PA-11 mechanical fittings] to remain gas tight while resisting pull-out forces.

Mechanical fittings constructed of metal or plastic other than the plastic specified for piping must be approved base on submission of manufacturer's test data and historical service records indicating their acceptability for the intended service.

Submit all traceability information for each mechanical fittings to include, but not limited to, the manufacturer, part number, serial number, and geographic information system coordinates of the installed location.

[2.4 FLEXIBLE METALLIC CONNECTORS FOR LPG SERVICE

Where flexible piping is required for connection of LPG container regulator to the manual shut off valve at the start of the LPG pipeline, provide flexible metallic connectors complying with UL 569, rated for a

SECTION 33 51 15 Page 20 working pressure not less than 2.4 MPa350 psig. Provide hose assembly with approved connectors that is designed for a pressure not less than 4.8 MPa700 psig.

]2.5 VALVES

NOTE: Valves and pressure regulators are necessary at all points where design requires pressure reduction or regulation. Require a shut-off valve in compliance with the requirements of 49 CFR

192.197. A central regulating station is generally

provided by the gas company and is usually located near the entrance to the installation. When valves, gas pressure regulators, and related devices are required in the contract, ensure that all necessary equipment will comply with the requirements of the gas company, and revise these paragraphs as required. Provide a detail of each regulating station and the following data for each pressure regulator: materials of construction, flow rate, type and specific gravity of the gas, inlet and outlet pressures, accuracy of control, and size and type of connections.

[2.5.1 Carbon Steel Valves for [Natural Gas][Manufactured Gas] Pipelines Provide valves suitable for shutoff or isolation in [natural] [manufactured] gas pipelines conforming to the requirements of 49 CFR 192. All materials used in valve construction must be resistant to the action of the gas being distributed under the service conditions.

Provide carbon steel valves installed in [natural gas][manufactured gas] pipelines that comply with API Spec 6D. Provide ball, check, gate, and plug valves as specified in the design drawings.

Provide Class [150][_____] steel valves 40 mm1-1/2 inches and smaller installed underground with butt-weld ends complying with ASME B16.25, with square wrench operator adaptor and corrosion prevention.

Provide Class [150][_____] steel valves 40 mm1-1/2 inches and smaller installed aboveground with butt-weld complying with ASME B16.25 or threaded ends complying with ASME B1.20.1, with hand wheel or wrench operator.

Provide Class [150][_____] steel valves 50 mm2 inches and larger installed underground with butt-weld ends complying with ASME B16.25, and square wrench operator adaptor and corrosion prevention coating.

Provide Class [150][_____] steel valves 50 mm2 inches and larger installed aboveground with butt-weld complying with ASME B16.25 or flanged ends complying with ASME B16.5, with hand wheel or wrench operator.

Provide valves 200 mm8 inches and larger with worm or spur gear operators, totally enclosed, grease packed, and sealed, with operators having Open and Closed stops and position indicators. Provide locking feature where indicated. Wherever the lubricant connections are not conveniently accessible, provide extensions for the application of lubricant. Provide

SECTION 33 51 15 Page 21 valves with lubricant compatible with gas service.

][2.5.2 Metallic Valves for LPG Pipelines Provide manual shut-off valves, excess flow valves, and backflow check valves in LPG pipelines conforming to the requirements of NFPA 58 and UL 125. Provide valves constructed from [steel, ] [ductile (nodular) iron complying with ASTM A395/A395M, ] [malleable iron complying with ASTM A47/A47M, ] [brass]. All materials used in valve construction must be resistant to the action of LPG under the service conditions. Valves must have a service pressure rating of [0.9 MPa125 psig for pipeline pressure of 0.9 MPa125 psig or less] [ and ] [1.7 MPa250 psig for pipelines operating above 0.9 MPa125 psig].

[Provide pressure spring loaded relief valves that comply with UL 132 with flow capability to limit the pressure in the pipeline to below the Maximum Allowable Operating Pressure (MAOP) for the system.] ]2.5.3 Plastic Valves for [Natural Gas][Manufactured Gas][LPG] Pipelines [Provide valves installed in polyethylene distribution pipelines that are constructed of polyethylene of the same material classification and SDR as the connecting pipe. Comply with ASTM D2513 and ASME B16.40 for underground installation only. Provide valves with [butt-type fusion fittings complying with ASTM D3261] [socket-type fusion fittings complying with ASTM D2683][electro fusion-type fittings complying with ASTM F1055].] [Provide valves installed in PA-11 distribution pipelines that are constructed of PA-11 of the same material classification and SDR as the connecting pipe. Comply with [ASTM D2513-99] [ASTM F2945] and ASME B16.40 for underground installation only. Provide valves with [butt-type fusion fittings complying with [ASTM D2513-99] [ASTM F2945], Annex A2] [electro fusion-type fusion fittings complying with ASTM F2600].]

2.5.4 Excess Flow Valve (EFV)

Provide [bypass type EFV with automatic reset][non-bypass type EFV with manual rest] that conforms to MSS SP-142 and ASTM F2138 and tested to ASTM F1802. Submit an EFV Design and Installation Guide which includes the manufacturer's product design data and installation instructions. Submit all traceability information for each EFV to include, but not limited to, the manufacturer, part number, serial number, and geographic information system coordinates of the installed location. Provide appropriate valve box where access for maintenance or reset is required.

2.5.5 Valve Box

Provide [street valve box with cast-iron cover and two-piece 130 mm5-1/4 inch shaft-slip valve box extension][rectangular concrete valve box, sized large enough for removal of valve without removing box]. Cast the word "Gas" into the box cover. Use valve box for areas as follows:

a. Roads and Traffic Areas: Heavy duty, cast iron cover.

b. Other Areas: Standard duty, concrete cover.

[ c. Airfields and Special Loadings: As detailed.] SECTION 33 51 15 Page 22

2.6 PRESSURE REGULATORS

************************************************************************** NOTE: Coordinate this paragraph with the specified requirements in paragraph VALVES.

Provide ferrous bodied regulators with backflow protection, designed to meet the pressure, temperature, flow and other service conditions.

[2.6.1 LPG Main Regulators NOTE: There are several methods of reducing and regulating the pressure of LPG within the distribution pipeline. The designer must specify the NFPA 58 compliant regulator or regulator combination that is appropriate for the LPG service that is provided.

LPG regulators must comply with UL 144 and NFPA 58. Line pressure regulators that comply with ANSI Z21.80/CSA 6.22 are not allowed in the LPG distribution pipeline, but are used in accordance with NFPA 54 to reduce a 17.8 kPa2 psig service line pressure to appliance regulator inlet pressure. Appliance regulators that comply with ANSI Z21.18/CSA 6.3 must not be used in an LPG distribution pipeline.

Provide LPG two stage regulator systems as required by NFPA 58: a. Single stage regulators are not allowed in an LPG pipeline.

[ b. Automatic changeover regulator incorporating an integral two stage regulator, with [integral pressure relief to limit second stage outlet pressure to 14 kPa2 psig when seat disc is remove and inlet pressure is 104 kPa15 psig][overpressure shutoff with manual reset] on the outlet of the second stage regulator, for use on multiple cylinder installation.] [ c. Integral two-stage regulator with means to determine the outlet pressure of the high pressure regulator, with [integral pressure relief to limit second stage outlet pressure to 14 kPa2 psig when seat disc is remove and inlet pressure is 104 kPa15 psig][overpressure shutoff with manual reset].] [ d. High pressure regulator installed on the LPG container with [integral][separate] relief valve, and a first stage regulator, with integral pressure relief, installed downstream of the high pressure regulator to serve multiple second stage regulators with [integral pressure relief to limit second stage outlet pressure to 14 kPa2 psig when seat disc is remove and inlet pressure is 104 kPa15 psig ][overpressure shutoff with manual reset] on the outlet of the second stage regulator.] [ e. First stage regulator, 69 kPa10 psig maximum outlet pressure, with integral pressure relief, and a second stage regulator with [integral pressure relief to limit second stage outlet pressure to 14 kPa2 psig when seat disc is remove and inlet pressure is 104 kPa15 psig ][overpressure shutoff with manual reset].]

SECTION 33 51 15 Page 23

[ f. Integral 2 psi service regulator, 17 kPa2.5 psig maximum outlet pressure with [integral pressure relief to limit outlet pressure to 35 kPa5 psig when seat disc is remove and inlet pressure is 104 kPa15 psig ][overpressure shutoff with manual reset].] 2[ g. psi regulator system including a first stage regulator, 69 kPa10 psig maximum outlet pressure, with integral pressure relief, and a 2 psi regulator, 17 kPa2.5 psig maximum outlet pressure with [integral pressure relief to limit 2 psi regulator outlet pressure to 35 kPa5 psig when seat disc is remove and inlet pressure is 104 kPa15 psig][overpressure shutoff with manual reset].] ][2.6.2 [Natural][Manufactured] Gas Main Regulators Provide pressure regulators for main gas distribution pipelines from a qualified manufacture of pipeline regulators. Equip distribution pipelines with regulators where that pipeline is supplied from a source of gas that is at higher pressure than the maximum allowable operating pressure of the distribution pipeline. Provide regulators of adequate capacity that are rated for the inlet pressure of the gas source and the anticipated operating temperature. In addition to the pressure regulating devices, provide a protective method to prevent overpressuring of the system in accordance with 49 CFR 192, Section 195. Suitable protective devices are as follows:

NOTE: The designer may design and specify the method and device used to create overpressure protection that complies with 49 CFR 192, or the designer may include all of the methods allowed in 49 CFR 192 to allow the contractor to select a cost effective method. However, the designer must coordinate this decision with the authorized Distribution System Operator to ensure compliance with locally adopted requirements or standards.

a. Spring-loaded relief valve meeting the provisions of

ASME BPVC SEC VIII D1.

b. Pilot-loaded back pressure regulator used as relief…