Hill AFB IFS Natural Gas LPG

Hill Air Force Base
Installation Facilities Standards (IFS)
G10 Hill AFB IFS Natural Gas and LPG
Comply with Air Force Corporate Standards for Overview: http://afcfs.wbdg.org/index.html

Summary of Sections in this Supplementary Document:
G10.0. General Requirements
G10.1. General Gas Pipe Design
G10.2. Line Location
G10.3. Inspection
G10.4. Gas Meters
G10.5 Pressure Regulators
G10.6 Liquefied Petroleum Gas
G10.0 General Requirements
10.0.1 Note: This Supplementary Document is provided as a supplement to the Hill AFB IFS. If there are any discrepancies between this Supplementary Document and the requirements of the IFS, the IFS will govern.
10.0.2 This Supplementary Document supersedes the Hill Air Force Base Architectural Compatibility Guide dated 01 February 2019.
G10.1 General Gas Pipe Design
10.1.1 Natural Gas distribution systems design and installation shall comply with AFMAN 321067, 49 CFR Part 192 and NFPA 54 National Fuel Gas Code. Distribution pressures at HAFB will vary with location but are typically 35 psi. All new risers must be anode less and shall have an isolation valve with dielectric protection. All subgrade piping containing natural gas shall be medium density polyethylene (see ASTM D2513) with only electro fusion, socket weld or butt fusion type fittings. Mechanical, barbed or stab fittings are prohibited. All natural gas system installers must be certified for installation for the type of gas system components being installed. 10.1.2 Saddle connection fittings and hot taps are prohibited. G10.2 Line Location
Natural Gas distribution system lines shall never be installed or allowed to remain under buildings. They shall not be laid in the same trench with other utilities to preclude the possibility of leaking gas following along or collecting in other pipelines or conduits. For the same reason, gas lines will be placed above other utilities whenever they cross, if practicable. Gas lines shall not be laid under paved streets or in other locations subject to heavy traffic whenever practicably avoidable. Whenever it is necessary to locate gas lines in such locations, the lines must be protected by suitable casing and by burying to a depth to provide at least 2 feet of cover over the top of the pipe. (When gas lines are installed above other utilities). Sufficient clearance must be maintained between plastic mains and steam, hot water, power lines, and other sources of heat, to avoid temperatures in excess of 60 degrees C (140 degrees F) for medium density polyethylene