AWS D1.3-Sheet Metal PQR Qualification Requirements

Date 06-11-2011 21:20

Dear Experts
I never woarked with Mat. thk. less than 6mm.
I dont the code with me.
Now we have to qualify PQR for welding SS316L HVAC Ducts ( thk 3mm )
Prefer to use SMAW, FCAW or GTAW
Appreciate you share your experience:-

1) Thk Range Qualified
2) Mechanical Test Redq
3) Challenges in qualifying PQR and on production welding
4) Welder Qualification
5) Prefer to use KOBELCO or ESAB consumables
6) Essential and Non-Essential Varibales for PQR & WQT qualifcations

Thanks to all of you

By Lawrence (*****)

Date 06-12-2011 05:11

D1.3 is the code for sheet steel.

Probably not the ideal code for the stainless you have mentioned.

D1.9 sheetmetal code has procedure qualification elements that can often be done in house. Maybe a look there would suit?

By MBSims

Date 06-12-2011 15:50

I agree with Lawrence. We have always used AWS D9.1 for HVAC ducts with GMAW-Short circuiting or GTAW process. As I recall, a 4G test with 10 ga. and 18 ga. coupons qualifies all positions and sheet metal gage thicknesses.

By Nalla

Date 06-12-2011 21:03

Dear Sirs
I'll refer D1.9
THKS

By 803056

Date 06-12-2011 21:46 Edited 06-12-2011 22:00

D1.6 Structural Welding Code/Stainless Steel has no lower thickness limitation. It can be used for sheet metal as well as for plate thicknesses.

Best regards - Al

By Joseph P. Kane (****)

Date 06-13-2011 12:55

Nalla

As Al Moore points out, D 1.6 covers welding the sheet thicknesses of Stainless Steel. If D 1.1 was specified in your contract, it may be necessary to work to D 1.6 "by reference". However, if you can get away with it, D 9.1 is the way to go.