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Transmission Lines: Repair of Leaks, Welds, etc. (17.3)

Criticality: High
Progress: Addressed, Not Adequately
Score: 20
DOT Relevance: §192.706, §192.711 – .719

Description of Key Area

The sections listed above can be found under Subpart M (Maintenance) of 49 CFR 192. The Code states requirements for various types of pipeline repair.

Discussion of Criticality

It is important to know what types and extents of damage or leaks can be repaired without replacements being performed.

Discussion of Progress

There are currently several potential repair techniques that may be suitable for hydrogen pipe such as using clock spring techniques or other permanent repair methods.

ASME B31.12 is considering the need for full cylinder replacement for defects that must be repaired.

Recommendations

Standards for repairs of leaks, welds, etc. for hydrogen transmission lines must be established and incorporated by reference into the federal code.