×
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

Dissimilar base metal welder qualifications as per ASME sec IX

Dissimilar base metal welder qualifications as per ASME sec IX

Dissimilar base metal welder qualifications as per ASME sec IX

(OP)
Hello,
As Per QW 423.1 When a base metal shown in the left column is used for welder qualification, the welder is qualified to weld all combinations of base metals shown in the right column, including unassigned metals of similar chemical composition to these metals.
Does it mean any combination like, if base metal in welder qualification is P1-P1 GTAW+SMAW with or without backing with F.no 6 & 5 then he is qualified to weld P1-P8 GTAW+SMAW with or without backing with F.no 6 & 5 ?

RE: Dissimilar base metal welder qualifications as per ASME sec IX

Correct. Just make sure you put "optional" under the gas backing for GTAW. Then you can add a purge later for stainless GTAW if required.

RE: Dissimilar base metal welder qualifications as per ASME sec IX

I am presuming you are meaning backing gas (inert gas) and not backing material ?
If you qualified with backing gas you cannot weld in production without backing gas (eg. P1 would need to be purged)
If you welded P1 with F6 & 4 (C/S) without purge then as David stated you would put "optional" for gas backing so you can add it for stainless if required.
However, if you welded P1 with F6 & 5 (S/S) with gas backing then you would need to put "required" for gas backing.
Regards,
Shane

RE: Dissimilar base metal welder qualifications as per ASME sec IX

I believe the OP was referring to backing material...I just added the gas as an FYI.

RE: Dissimilar base metal welder qualifications as per ASME sec IX

David,
Without the OP's response we will never know.
However, it seems a bit strange.
SMAW/FCAW, SMAW/GMAW, GMAW/FCAW - you could understand the use of backing material but why would you use backing material with a GTAW root run ?
Cheers,
Shane

RE: Dissimilar base metal welder qualifications as per ASME sec IX

True enough.....and I am prone to misunderstanding!! I just assumed the performance testing was done on open root, resulting in being qualified with or without backing for the GTAW.

RE: Dissimilar base metal welder qualifications as per ASME sec IX

(OP)
David/DekDee,
P1-P1 GTAW+SMAW with or without backing with F.no 6 & 5 (i.e. test coupon P1-P1 was welded without backing gas for root during welder qualification test so welder is qualified for with or without backing gas). so can this qualification be used for P1-P8 with backing gas ( F no's remain same )?

RE: Dissimilar base metal welder qualifications as per ASME sec IX

Yes.
However, just curious.
Was the GTAW filler material stainless steel or carbon steel ?
If stainless steel was used was there no backing gas on the welder qualification ?

RE: Dissimilar base metal welder qualifications as per ASME sec IX

(OP)

GTAW filler material was carbon steel (ER 70 S-2 ). But for production weld we have to use P1-P8 with ER309L+E309L with backing gas.
Thanks,

RE: Dissimilar base metal welder qualifications as per ASME sec IX

You said in your OP you welded the SMAW with F5 (stainless steel) but the GTAW was carbon steel ?
Is that correct ?

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