MIG pipe welding

[ElronMcK]

I am trying to improve my welding skill set. I am D1.1 certified in stick ("SMAW") 3G 3/4" max thick plate.

1. Assuming AWS and ASME pipe welding - say 0.2" up to 0.5" wall, out of position, short circuit GMAW-S, both shop and field
My question: Is MIG with A75/C25 common and/or industry-accepted process?

(Most of my field observation is stick or flux core for process pipe.)

2. Are the any other MIG SWPS beside those shown by AWS database (

https://pubs.aws.org/t/procedures)?

I am looking to get certified using MIG (again, to expand my skillset and opportunities), and want to use an accepted WPS, and not try to write my own pre-qualified WPS.

Thanks

 

[DekDee]

IM,
" I've seen amazing semi-auto work done on open root (5mm gap!) pipe in 5G using intelligent short-arc machines - Miller RMD or Lincoln STT. I'm sure there's examples on YT."

I remember putting root runs in with a Lincoln STT machine back in the '90's - 5G in manipulators (pipe rotators) - amazing piece of equipment.
Would presume there have been some pretty large developments in the process in over 20 years.

 

[ATSE]

DekDee - Thanks for the help.
Does anyone else interpret D1.1-20 Clause 6, section 6.7 as not allowing fab shops to share WPS and/or PQR? Or is there another section of D1.1 that is more explicit?
Not hijacking this thread - I think this is pertinent to Elron's follow up questions.

As an engineer that reviews WPSs and PQRs, I realize that sometimes the personnel that created those documents are no longer with the same company years later; or, the same personnel have now recycled these documents with little changes for their own shop after breaking away from parent shop. For either condition, do I care (i.e. does D1.1 explicitly compel me to reject these documents)? Seems to me a gray area.

 

[DekDee]

ATSE,
Does the 2020 edition include this ?

4.2.1.1 Qualification Responsibility. Each manufacturer
or Contractor shall conduct the tests required by
this code to qualify the WPS. Properly documented
WPSs qualified under the provisions of this code by a
company that later has a name change due to voluntary
action or consolidation with a parent company may utilize
the new name on its WPS documents while maintaining
the supporting PQR qualification records with the
old company name.

In the 2015 edition Section 6, Clause 6.7 is Alternative acceptance criteria for inspection.
What is Clause 6.7 in the 2020 edition ?

 

[ATSE]

Dek,
The D1 codes went thru a re-org / renumbering in 2020, including D1.1, for clause order consistency between the different codes in the series.
Old Clause 4 is now Clause 6.
Slightly different wording.

Without further clarification, I (almost) understand this to mean that sharing PQRs and WPSs is okay, or at least not unacceptable, since all the personnel and associated paperwork are fungible.

 

[DekDee]

ATSE,
Thank you for the info.
Looks like I am way out of date.
Just out of interest - is there a 6.2.1.1 ?
Cheers,
Shane

 

[DVWE]

ATSE,

AWS D1.1 has never allowed "sharing" WPSs or PQRs.

The section you quoted, "6.2.2.2" falls under clause 6.2.2, which is for Performance qualification.

Have a read of 6.2.1 and 6.2.1.1, which spells out the requirements for WPS qualification.

If the use of a typical or common WPS and material is required for production, I'd suggest you have a Complete read of Clause 5, which spells out the requirements for Prequalification of WPSs.

In a nutshell, the purpose of Clause 5 is exemption of WPS qualification as required for Clause 6. Clause 5 is useful for commonly used materials and welding rods and electrodes in production. So instead of sharing a common WPS, one can simply write a WPS in accordance with Clause 5 and still be in compliance with the code. There is quite a large range of materials for use under Clause 5.

The devil is in the details; she also wears prada.

 

[gtaw]

From AWS D1.1/D1.1M
6.2.1.1 Qualification Responsibility. Each manufacturer or Contractor shall conduct the tests required by this
code to qualify the WPS. Properly documented WPSs qualified under the provisions of this code by a company that later
has a name change due to voluntary action or consolidation with a parent company may utilize the new name on its WPS
documents while maintaining the supporting PQR qualification records with the old company name.

Best regards - Al

 

[97Harley]

In the nuclear field, pipe welding starts with a TIG root weld, argon shielded and stick finish.

 

[meltedEng]

97Harley, you smaw weld austenitic in field for nuclear? With 100% RT for hot zones?