The company I work for is going to test its welders in the near future what test would we take if we weld 2",3",4" and up with SMAW root and hot pass with 5p plus and cap with 7018.We build gas compressors if that helps at all.
EVWelder,
You will need to qualify welders to ASME IX.
A 2"(50 nb) coupon will qualify for all diameters from 1" OD upwards.
The thickness of your test coupon will govern your thickness qualification range. ( 2 x "t" )
A Schedule 80/XS coupon will qualify you to weld thicknesses up to and including 9.1 mm.
A Schedule 160 coupon will qualify you up to 12.76 mm and an XXS coupon will qualify you up to 18.18 mm wall thickness.
If these thickness coupons are unavailable you will probably need to discuss with a CWI your requirements and possible alternatives,
Regards,
Shane Feder
EVWELDER:
Just to add to what Shane has said: The SMAW root filler metal will probably be a F-No. 3 and the SMAW 7018 fill will be F-No. 4, each with qualified thickness ranges.
In order of choice of weld coupon I would go 2 inch sch 80, 2 inch sch 160, or super coupon 2-3/4 inch OD X 5/8 inch.
I have a question for you. In you post you refer to "5p plus". What does that mean?
Regards, Donnie Mann
5P plus is the newer formulation of Lincoln E6010. It is supposed to be better for pipe roots than the old standard 5P (red rod)
My question is for the real pipe hands out there who have used both... Is there in your opinion a big improvment with the Plus?
I also work with gas compressors. I tested my welders to ASME sec IX (required by B31.3). I used two tests for each welder - 2" XXS in 6G position and a 3/4" plate in 1G position. This is a standard company tests which qualifies the welder to all positions, 1" o.d. and up, and thicknesses to 1.500".
FYI thickness qualified -
Section IX [QW-452.1(b)] groove weld test for performance qualifies 2t up to 1/2 inch.
Using 1/2 inch thick and over with a minimum of three layers qualifies unlimited thickness.
Also-
5P+ was partly introduced because you'll find the old 5P does not work well at all with inverter power supplies.
Thanks for your reply. Call it my ignorance but, I dont really comprehend exactly what "maximum to be welded" (QW-452.1 (b)) means. It would be nice if ASME would actually put "unlimited" for the thickness qualified. Oh well, I learn something new everyday !! I love my job!!
Tito: Ya gotta love the double talk. Max to be welded assumes to me unlimited, but the max thickness's than can be qualified is 8". The welder can weld from here to the moon but the WPS max will be 8".
Regards, Donnie Mann
Donnie; not if the WPS is qualified for greater than 8" but then how many people weld on materials greater than 8" anyway?
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