Hello.

Please help me to understand when to use 1,0, 0.001 for Fac (Design Factor) of ASME B31.4. Is my understanding correct Fac=1 for "Restraint" and Fac=0 "Unrestraint"? For aboveground pipeline what Fac will be used?

Thank you in advance and hoping for your response.

Sincerley,

marchie