Criticality: Medium Progress: Addressed, Not Adequately Score: 12 DOT Relevance: §192.721
Description of Key Area
Section 192.721 (Distribution Systems: Patrolling) of Subpart M
(Maintenance) of 49 CFR 192 states, “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.”
Discussion of Criticality
The frequency of patrols must be determined as well as what
locations to patrol (business districts, outside of business districts, etc.).
The frequency of patrols may or may not be the same as that for natural gas.
Discussion of Progress
This topic will be addressed by ASME B31.12.
Recommendations
Standards for patrolling (including frequency of patrol) of
hydrogen distribution systems must be established and incorporated by reference
into the federal code.
