Differance between B31.1 and Sec. 8 1

[StW44145]

I have a customer that wants B31.1 and a fabricator that is Sec. 8. On the surface they appear to be one and the same but I don't know.

Is there a real differance between these 2 codes and what are they?

Thank you,

StW

 

[metengr]

They are different. B31.1 is a Code pertaining to Power Piping, while ASME B&PV Code, Section VIII is applicable to unfired pressure vessels. You really need to review the Scope for Section VIII and B31.1.

 

[stanweld]

The fabricator which holds a U Certificate of Authorization from the ASME may perform nonboiler external piping fabrication to B31.1. It may not perform ASME B31.1 boiler external pipe welding fabrication.

 

[mrpsi]

There are many differences between VIII-1 & B31.1:
-B31.1 is closer to B31.3 than VIII-1, as befits the component being designed and fabricated.
-Calculation equations are different (such as shells)
-Material allowable stresses are a bit different.
-Inspection requirements differ

to name a few.

 

[MJCronin]

StW...

What, exactly, is the scope of your cutomer's work..???

Is it piping...presure vessels....boilers or what ?

You state: "On the surface they appear to be one and the same but I don't know"

Have you actually reviewed these standards ?

-MJC