Welding procedure/process numbers. 1

[sc17332]

I have a drawing for an ASME pressure vessel and it calls for a weld spec of 1-1-T1. I am looking for information to find out the source of that particular weld spec as well as what that nomenclature means. Does anyone know where I can find the publication that will explain that spec?

 

[bpv66]

Is it a customer drawing? I'm guessing it may be their procedure number. Just a guess but 1-1-T1 could mean P1-P1, GTAW process, Rev. 1.

 

[weldstan]

Is this note on the vessel Manufacturer's drawing? If so, it no doubt reflects the Manufacturer's welding procedure specification to be used on that weld joint, as per bpv66. Ask the Manufacturer.

 

[sc17332]

It is actually on a drawing for ASME certification for a shop we work with. The original person in charge of their codes program unexpectedly died, and the new guy in charge is working with us for the calculations and specifications for them to renew their shop's stamp. The information stored in the previous mans head did not get passed on, and the books, and other information on these procedures can't be found in the office. In another forum I was told these specifications are in some of the ASME literature. The shop has the Section VIII-Div 1 book, but it is not in their code book. The question I have is which ASME publication? The likely sources are ASME Section II Part C, Section IX, or are they in any of the AWS publication. What I am trying to do is narrow the field of possibilities so we don't have to spend more $$$ than we have to.

 

[weldstan]

During the Joint Review process, the Manufacturer's WPSs are defined on the Joint Review vessel drawings. Check the Manufacturer's WPS files.

 

[bpv66]

Sounds like it's definitely the manufacturer's welding procedure identification number. The shop foreman should have a copy of this welding procedure.

 

[GenB]

If you cannot handle this little problem with the spec, this shop will loose the survey. The number given may belong to a flux core consumable, but irrelevant at this time. If a survey is coming the shop should prepare with all new designs and specs. And supportive knowledged quality manager/s and engineer/s.

 

[SportPilot]

@ sc17332

I am most certain that what you are seeing is in fact the manufacturer's welding procedure specification (WPS) number and not a spec number that you will find in a Code anywhere ("1-1-T1). This type of numbering is created solely by the manufacturer and is typical for companies that qualify and develop their own welding procedures. I developed a naming convention for welding procedure specifications in the past which was exactly what you are looking at. As in someone else's post, it appears to be P1 (Carbon Steel) welded to P1 (Carbon Steel) using the GTAW Manual (TIG) welding process. Number "1" after the "T" could mean that this particular WPS is very similar to a 1-1-T WPS of theirs but there may be one essential variable that had to be re-qualified, which was identified with the new WPS number that included the "1" after the "T". A good example of this would be gas composition and since it is an essential variable for the GTAW (TIG) welding process, if you want to weld with a different mixture than what was originally qualified, a new procedure would have to be qualified using the same parameters but of course using the new gas. After successful bend and tensile tests, you would have to write a new WPS that includes the new gas composition and can very well make that subtle identification in the new procedure with a "1" behind the "T".

I went and found the naming convention I created but click the link to take a look and you can see what I was explaining above.

http://files.engineering.com/getfil...95f8-711c2da8ec0a&file=WPS_and_PQR_Naming.pdf

Jerry Salter
Director of Quality Assurance