Progress: Addressed, Not Adequately
DOT Relevance: 192.301 192.327
Subpart G (General Construction Requirements for Transmission Lines and Mains) of 49 CFR 192 prescribes minimum requirements for constructing transmission lines and mains.
The category of construction requirements includes the subjects of mechanical testing, creation of a material properties database, and evaluation methodologies.
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.
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.