Welder Qualification Criteria 2

[Goahead]

Background: A welder has deposited E 7018 (F4) electrode on a 6"Ø X Sch 40 test coupon with backing. According to
QW-452.1(b), this welder is qualified to use F4 electrodes up to 14.22mm with backing.
According to QW-433, this welder is also qualified to use F1, F2 & F3 with backing.

Question: If a production joint having 14.22 mm thickness with backing strip is to be deposited using E7024 (F1), E6013 (F2) & E6010 (F3) electrodes, do we have to re-qualify the above welder in all the three F numbers individually?

Thanks & best regards

http://www.welding-advisers.com/

 

[weldtek]

As you point out, per QW 433, F4 qualifies for F1- F4.

 

[metengr]

Question: If a production joint having 14.22 mm thickness with backing strip is to be deposited using E7024 (F1), E6013 (F2) & E6010 (F3) electrodes, do we have to re-qualify the above welder in all the three F numbers individually?

Reply; No. See QW-353 in Article 2 and QW-404.15 in Article IV in the 2007 Edition of ASME B&PV Code, Section IX.

 

[pipewelder1999]

The only case in which the electrodes do NOT qualifiy for the lower F Number is in cases in which there is NO backing. F4 open roots qualify for F4 Open roots only and F1,2,3 with backing.

See QW-433

Gerald Austin
Iuka, Mississippi

http://www.weldinginspectionsvcs.com

 

[weldtek]

And F4 with backing

 

[pipewelder1999]

Hey Weldtek,

Yup. I failed to add that one.

Gerald Austin
Iuka, Mississippi

http://www.weldinginspectionsvcs.com