Tuesday, December 9, 2014

Maybe B2.1 is the better choice...

 Hey Paul,
 It’s Kody P.  I was in your Minneapolis seminar, I was wondering if you would be willing to get me pointed the right direction for a PQR/WPS testing of pipe/tube to plate for fillets and PJP groves in AWS-D1.1?
The pipe/ tube is “unlisted” material of the following specs: A519 1026, A519 1026cw, A519 1026hr, A513 1026, A513 1026cw, (min yield is 35ksi – 70ksi grade dependent).  All are not pre-qualified or listed and the rings will be A36 or some grade of A514.  Size ranges from 2” OD tube 3/16 wall with 1/8” fillet and bevel to 20” + OD 2” wall with up to 1 ¼” fillet / bevel.  Plate ranges from 3/8” to 2”+
I know I need to do macro etches but I am a little confused as to how to get the tensile specimens /side bends for the sizes we are working with.
As of right now my thoughts are to purchase some large od tube/pipe and use that to cut coupons from to do 1G test plates to prove the process, Then do the fillets/PJP etches. If both are successful I could use both PQR’s to make a WPS and repeat for all combos. But then at that point should I use AWS-Fig. 4.10/4.11 or 4.23 for the 1G test set up?
Any thoughts or advice would be appreciated
Thank you
Kody P. Lead Inspector

It’s amazing what you run into, isn’t it?  My first WPS experience as a “green” CWI was insuring the company I worked for met all the requirements to weld carbon and stainless to ASME.  Something I had zero experience with.  (I learned a lot… one mistake at a time)
First thing I would do if I were you would be to group the A519 grades and the A513 grades (what do I mean by that?).  Just find some A519 Grade 1026 and some A513 Grade 1026 (forget about those additional designators, they don’t amount to enough to matter.).
Next: Get yourself a copy of AWS-B2.1 Specification for Procedure and Performance Qualification.  In it you’ll find that the AWS groups your A519 into Group 2 and your A513 into Group 1 (or visa-versa, I don’t remember which).
This group of PQR's could get extremely complicated if you qualify to D1.1, so don’t.  Qualify to AWS B2.1 and just state that on your documentation.  Qualifying to B2.1 can be as simple as making the weldment just as you do in production and then cutting and etching the welds to insure you meet the size and soundness requirements.  You may have to do one for each pipe size (or significant change in part size) but that is a whole lot easier and can be done in pretty short order.
I have a lot of experience in writing WPS's for “Unlisted” steels and take it from me, meeting D1.1 with materials that aren’t the same shape (ones a tube and ones a plate) sucks.  I would never advise it.
Sounds to me like you are the perfect example of why the AWS came up with B2.1
That's my advice and I'm only 1/2 a beer into giving it, so it should still be good.
Let me know what you decide.

1 comment:

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