Maximum Allowable Operating Pressure: Steel and Polyethylene Pipelines (16.8)
Criticality: High Progress: Addressed, Not Adequately Score: 20 DOT Relevance: ยง192.619
Description of Key Area
Section 192.619 details the maximum allowable operating pressures
for steel and polyethylene pipelines.
Discussion of Criticality
It is not yet clear if MAOP determination methods need to be altered
for hydrogen pipelines.
Discussion of Progress
ASME B31.12 will only allow location class 3 or 4 designs for
hydrogen pipelines at this time (50% and 40% SMYS respectively). Pipe design
may be changed from a stress based design to a strain based design. Discussions
are scheduled for March of 2006.
Recommendations
Standards
for maximum allowable operating pressure for hydrogen pipelines must be
incorporated by reference into the federal code.