49 C.F.R. § 192.721 Distribution systems: Patrolling.
Title 49 - Transportation
(a) The frequency of patrolling mains must be determined by the severity of the conditions which could cause failure or leakage, and the consequent hazards to public safety. (b) Mains in places or on structures where anticipated physical movement or external loading could cause failure or leakage must be patrolled— (1) In business districts, at intervals not exceeding 4 (2) Outside business districts, at intervals not exceeding 7 [35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192–43, 47 FR 46851, Oct. 21, 1982; Amdt. 192–78, 61 FR 28786, June 6, 1996]
Title 49: Transportation
PART 192—TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS
Subpart M—Maintenance
§ 192.721 Distribution systems: Patrolling.
