Jeff,
Section IX is a dependent code along with Section V. Neither builds anything, but can be (and usually are) invoked by construction codes such as Sections 1, 3, 8, etc. Piping B31 series .1, .3, .8 etc. Then there are some API standards and others as well.
Structure of the code is different from AWS significantly. I would advise getting familiar with the structure and not get buried in the bug dust at first. It would be wise to assess your new employers past business, quality manuals, and any former, current, or planned ASME stamp activities.
Most importantly remember this. ASME Always. Sometimes. Maybe. Everytime. That may seem like a joke until you get into the particulars of the code.
You will have to look at the specific construction code. Generally, the construction code is not going to provide the prescriptive visual criteria found in AWS standards. For example, one will not find acceptance criteria for undercut in Section VIII. Melt through is not address for all fluid services in ASME B31.3 with the exception of the High Pressure Fluid service.
If one uses the VT criteria of Section IX, the welder can weld the pipe solid and the face reinforcement has no limits when qualifying. I always chuckle when contractors say they are welding in accordance with Section IX or when they say their VT criteria is per Section IX.
Best regards - AL
I believe Table 341.3.2 of ASME B31.3:2012 addresses melt through (as defined by AWS A3.0:2010).
They call it internal protrusion in 31.3 and they group it with reinforcement. It is in the last row of the table
For all but Category D fluid service, it is shown as symbol "L", for Category D it is "M"
Symbol "L" gives a table of allowed reinforcement and internal protrusions based on wall thickness, of course, there are a couple of notes that provide some detail on how to measure, excludes fillets, and modifies the allowable dimensions for aluminum welds.
Symbol "M" allows for 2x the value in "L", and then goes on to say that the aluminum note does not apply
You may be correct, but I somehow remember the internal protrusion only appling to the High Pressure fluid service. When I get a chance, I'll look it up.
Al
Just checked again, and per 341.4.1, the above criteria are for Normal Fluid Service
Section VIII doesn't have a VT Criteria for welding but with that being said the rules for PT (Appendices 8) MT (Appendices 6) are a useful guidelines. Make your self familiar with UW-3 (Joint Categories), UW-33 (Misalignment) and UW-35 (Weld Reinforcement).
Thanks, good info. I found the VT criteria I was looking for in B31.1.
If anyone else can give me some info that might help, or point me in the right direction where I can speed up my transition from AWS to ASME, I would really appreciate it!
Thanks again!
Jeff
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