AWS A5.1 7016 used in DCEN

By ALBO Date 09-14-2017 07:36

I need some tecnical answer regarding AWS A5.1 . Can I make a PQR according to AWS D1.1 using 7016 stick electrode in DCEN when that electrode is given for DCEP/AC only? I'm using ESAB OK 53.6815 classified AWS A5.1 in DCEP/AC but recommended by manufacturer ESAB in EDEN. I like to go with 7016 DCEN for root pass only and covered in 7018DC+
Thanks for your support!!

By jwright650 (*****)

Date 09-14-2017 11:00

If you are looking for a E7016 to run DCEN then why not this one?

http://www.lincolnelectric.com/en-us/Consumables/Pages/product.aspx?product=Products_Consumable_StickElectrodes-MildandLowAlloySteels-Pipeliner-Pipeliner16P(LincolnElectric)

Attachment: c110071.pdf (79k)

By ALBO Date 09-14-2017 11:17

Thanks JW!!
Yes this is a good one and qualified AWS D 1.1 negative. My client is rejecting my WPS because he say I can't use 7016 in DC- according to AWS D1.1 wheras I did a PQR with 7016 negative validated by third parts Bureau Veritas?? How can I chalenge such client ?
Thanks

By jwright650 (*****)

Date 09-14-2017 16:03

For a qualified WPS, polarity is an essential variable. Table 4.5, item 13
For a pre-qualified WPS use the electrode mfg's recommended polarity Clause 3.6, and Table 3.8 item 10

By ALBO Date 09-18-2017 07:05

Thanks JW again for your kind answer, considered that because it is an essential variable we have realised a PQR with 7016 in DC- for the root with successfull results witnessed by 3 parties DNV, then what can we do more than that?

By 803056

Date 09-18-2017 11:09

Basically, one can qualify a WPS with any parameters or conditions that may fall within the recommendations, or requirements of a code as well as any unusual on nonconforming parameters.

In one qualified a WPS for CJP groove welds without back gouging, than back gouging is not required for production welds. If the contractor qualifies a CJP groove weld without backing, i.e., open root, then production welds can be made without backing.

The contractor is free to do in production what ever was demonstrated by the qualification process.

A successful Qualification in the overhead position using E7028 permits the contractor to use E7028 in the overhead position.

Want to weld on oil soaked surfaces? Demonstrate it can be done successfully by qualifying the WPS with oil soaked base metal.

Al