ASTM A312 welded pipe
ASTM A312 welded pipe
(OP)
I have one question about welded 304 Stainless Steel pipe.
The applicable pipe specification is ASTM A312. The manufacturer's welding procedures indicate that the pipe is welded by PAW without filler metal (first layer, Machine type) and GTAW (Second layer, Manual type) without filler metal.
My questions:
(1) According to ASTM A312, welded pipe shall be made using an automatic process with no addition of filler metal. Can we use Manual GTAW for the this welded 304SS pipe?
(2) Suppose Manual GTAW is used, can we weld a 12mm thick pipe without filler metal using GTAW Process?
Thanks.
The applicable pipe specification is ASTM A312. The manufacturer's welding procedures indicate that the pipe is welded by PAW without filler metal (first layer, Machine type) and GTAW (Second layer, Manual type) without filler metal.
My questions:
(1) According to ASTM A312, welded pipe shall be made using an automatic process with no addition of filler metal. Can we use Manual GTAW for the this welded 304SS pipe?
(2) Suppose Manual GTAW is used, can we weld a 12mm thick pipe without filler metal using GTAW Process?
Thanks.





RE: ASTM A312 welded pipe
2) What does the manufacturer's PQR say they can weld?
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: ASTM A312 welded pipe
The PQR tests were passed.
RE: ASTM A312 welded pipe
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04