This standard shall apply to the minimum design, material, performance, and testing requirements of natural gas service regulators up to and including 2 inches (50 mm) not covered in ANSI B109.4 and inlet pressures up to 125 psig (861.8 kPa). These regulators are used to control the gas delivery pressure (also referred to as set pressure or P2) to pressures at 20 psig or less (138 kPa). This standard shall apply only to regulators manufactured after the approval date of this standard.
This standard includes overpressure protection options including internal relief valves (IRVs), self-operated integral slam shut valves, integral monitors, and internal monitors.
