Welder Qualification with HDPE electro fusion weld
Welder Qualification with HDPE electro fusion weld
(OP)
Good morning,
I have a question regarding welder qualification (performance records) procedures for HDPE pipe electrofusion butt weld. I couldnt find any reference in ASME standards for;
- After welder test, qualified diameters, thickness range
- Qualified materials (I will use HDPE PE 100 SDR 11)
- Which destructive tests should I send to qualify welders
Which standard reference should I follow? (ASTM D3261 maybe?)
Ps. Welders already have certificate that required by the country I am in. All I need is to test them like we do in steel piping.
Thanks&Regards,
I have a question regarding welder qualification (performance records) procedures for HDPE pipe electrofusion butt weld. I couldnt find any reference in ASME standards for;
- After welder test, qualified diameters, thickness range
- Qualified materials (I will use HDPE PE 100 SDR 11)
- Which destructive tests should I send to qualify welders
Which standard reference should I follow? (ASTM D3261 maybe?)
Ps. Welders already have certificate that required by the country I am in. All I need is to test them like we do in steel piping.
Thanks&Regards,





RE: Welder Qualification with HDPE electro fusion weld
RE: Welder Qualification with HDPE electro fusion weld
Physical tests, if you really want them, can be to ISO 13593 for pipe butt fusion and 13951 for fittings. Machines are to ISO 12176-1.
Site NDT is very limited and is only a printout from the auto machine or remove the weld bead and test is physical (does it bend without snapping) and then retain the weld bead for each butt fusion.
Look at few vendor websites such as http://www.fusionprovida.com/products/butt-fusion
Also I've fouind these free downloads very useful in presenting PE technology and instaltions issues - http://www.gpsuk.com/literature-downloads/
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Welder Qualification with HDPE electro fusion weld
The thing is our HDPE welding machine is not automatic (butt fusion type), welder is cutting and heating the surfaces by himself. And our client considers them as a welder not as an operator. I couldnt find anything related to this in internet.
And they want to destructive test on every diameter, which will cost us a lot. If there is a welder qualification standard for HDPE welder, it should include some diameter/thickness range.
Thanks,
RE: Welder Qualification with HDPE electro fusion weld
Either that or go the fully auto route. Depends how many sizes and welds you've got to do, but could easily be worth it for productivity alone, never mind quality of the weld and traceability / QA if the client is that nervous about this strange PE stuff....
PS - Also look at the testing issue. At test pressure, you often get a pressure decay on PE as it "creeps". This perfectly normal, but can freak out client reps who have only seen steel piping and hence like to see a nice steady pressure. If you keep adding water to maintain a steady presusre, you might end up with a bigger PE pipe than you started with...
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Welder Qualification with HDPE electro fusion weld
Regards,
RE: Welder Qualification with HDPE electro fusion weld
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Welder Qualification with HDPE electro fusion weld
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Welder Qualification with HDPE electro fusion weld