Hello, I'm currently involved in a hydrogen pipeline project where the design pressure is 350 barg. According to ASME B31.12, this pressure level is excluded for pipeline design. However, in Table GR-2.1.1-2, there's a note that states:
"The maximum operating pressure (MOP) shall not exceed 21...
What is the formula for calculating the thickness in compliance with both ASME B31.3 and the European Pressure Equipment Directive (PED)? While ASME B31.3 has more conservative allowable stresses for carbon steel materials compared to PED, the guidelines for austenitic materials are not as clear.
