49 CFR §192.740

1. (a)This section applies, except as provided in paragraph (c) of this section, to any service line directly connected to a transmission pipeline or regulated gathering pipeline as determined in § 192.8 that is not operated as part of a distribution system.
2. (b)Each pressure regulating or limiting device, relief device (except rupture discs), automatic shutoff device, and associated equipment must be inspected and tested at least once every 3 calendar years, not exceeding 39 months, to determine that it is:
   1. (1)In good mechanical condition;
   2. (2)Adequate from the standpoint of capacity and reliability of operation for the service in which it is employed;
   3. (3)Set to control or relieve at the correct pressure consistent with the pressure limits of § 192.197; and to limit the pressure on the inlet of the service regulator to 60 psi (414 kPa) gauge or less in case the upstream regulator fails to function properly; and
   4. (4)Properly installed and protected from dirt, liquids, or other conditions that might prevent proper operation.
3. (c)This section does not apply to equipment installed on:
   1. (1)A service line that only serves engines that power irrigation pumps;
   2. (2)A service line included in a distribution integrity management plan meeting the requirements of subpart P of this part; or
   3. (3)A service line directly connected to either a production or gathering pipeline other than a regulated gathering line as determined in § 192.8 of this part.