Welding procedure/process numbers.
Welding procedure/process numbers.
(OP)
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?





RE: Welding procedure/process numbers.
RE: Welding procedure/process numbers.
RE: Welding procedure/process numbers.
RE: Welding procedure/process numbers.
RE: Welding procedure/process numbers.
RE: Welding procedure/process numbers.
RE: Welding procedure/process numbers.
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/getfile.aspx?folder=b...
Jerry Salter
Director of Quality Assurance