Construction Requirements (11)
Criticality: High
Progress: Addressed, Not Adequately
Score: 20
DOT Relevance: §192.301 – §192.327
Description of Key Area
Subpart G (General Construction Requirements for Transmission
Lines and Mains) of 49 CFR 192 “prescribes minimum requirements for
constructing transmission lines and mains.
Discussion of Criticality
The category of construction requirements includes the subjects
of mechanical testing, creation of a material properties database, and
evaluation methodologies.
Discussion of Progress
CGA has created hydrogen pipeline non-mandatory standards
addressing piping and piping component design, construction, pre-service,
operation and monitoring, and safety.
SRNL has identified key needs for properties and Applications to
Construction Codes which include standards for hydrogen mechanical testing, a
database of material properties, evaluation methodologies such as a fracture
control plan, and a qualification plan for service-experienced
materials/systems.
Recommendations
Additional research should be performed to address factors
relating to construction requirements. Construction requirements for hydrogen
pipelines will be included in ASME B31.12 and once established should be
considered for incorporated by reference into the federal code.
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