×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

WPS qualified with GMAW-S and GMAW-P

WPS qualified with GMAW-S and GMAW-P

WPS qualified with GMAW-S and GMAW-P

(OP)
I am reviewing a welding procedure that was qualified using a 0.28 in. thick test plate and was welded with short-circuit GMAW for 1/8 in. and pulse GMAW for the remainder of the thickness. In the WPS, is the base metal thickness qualified restricted by QW-403.10 or is QW-451.1 required to be followed?

RE: WPS qualified with GMAW-S and GMAW-P

Since your plate T was 0.28" I would base the thickness qualified on QW403.10. It is only over 1/2" T that QW451.1 would apply, at least the way I read it.

RE: WPS qualified with GMAW-S and GMAW-P

The qualified base metal thickness shall be 1.1*0.28 = 0.308 inches for GMAW-S (see QW-403.10)
You may also write on the WPS, two base metal thickness tanges, one for GMAW-S and second for GMAW-P. For GMAW-P, use Table QW-451.1.
Similarrly treat with weld metal deposited qualified thickness range for GMAW-S that is 1.1*1/8 = 0.1375 inches (see QW-404.32), and for GMAW-P see Table QW-451.1

Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN

RE: WPS qualified with GMAW-S and GMAW-P

Qualified base metal thickness = .4475"
Qualified thickness for GMAW-S = .1375"
Qualified thickness for GMAW-P = .310"

One maximum base metal thickness is all that is required.

RE: WPS qualified with GMAW-S and GMAW-P

hello jimmy123,
you cannot increase the production base metal thickness beyond 1.1 times the test coupon thickness when PQR test coupon thickness less than or equat to half of an inch is welded by GMAW-S, then how the qualified base metal thickness is 0.4475" ?

Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN

RE: WPS qualified with GMAW-S and GMAW-P

Nasir,
I agree with you regarding the thickness qualified but not sure I agree with having two ranges on one WPS.
0.28" = 7.11 mm
1/8" = 3.1 mm (GMAW-S) so remainder (GMAW-P) is 4.0 mm

2 x t for the GMAW-P on it's own = 8.0 mm
2 x t for GMAW-S/GMAW-P in combination = 7.82 mm

IMHO, Not much to be gained other than significant confusion if two ranges are listed on one WPS.

Just out of interest, is the GMAW-S considered as "backing" for the GMAW-P ?

Cheers,
DD

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources