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5G Hot Pass
Posted: Mon Dec 18, 2017 9:29 pm
by Henry Utley
This is my first post on the forum, so bear with me...
I have started welding 5G 6 inch ID 40 wall pipe, with a 6010+++++ for the root and 7018 the rest of the way. The root pass is fine for me, but I have trouble with tons of slag in the toes of the hot pass. Any advise on this?
Thanks for your time,
-John Henry Utley
Re: 5G Hot Pass
Posted: Tue Dec 19, 2017 7:43 pm
by Poland308
3/32 7018 at 75amps. As long as the coupon is still hot from the root. How thick was your land on the root? And what was your gap?
Re: 5G Hot Pass
Posted: Wed Dec 20, 2017 9:05 pm
by Henry Utley
The land is supposed to be 1/8 and the root opening is supposed to be 3/32. Land goes back and forth and root opening is usually a little wider.
Re: 5G Hot Pass
Posted: Wed Dec 20, 2017 11:18 pm
by Poland308
Keep the land at an 8th and make sure the gap is 3/32. I use a /8 6010 at about 75-80 amps, depending on the welder. Then run the hot pass with no weave just a steady pull.
Re: 5G Hot Pass
Posted: Thu Dec 21, 2017 10:36 am
by Henry Utley
Is a 3/32 for the hot pass what D 1.1 code wants?
Re: 5G Hot Pass
Posted: Thu Dec 21, 2017 6:00 pm
by Poland308
the Test I took allowed for use of 3/32 or 1/8. But sch 40 pipe is so thin that it’s much easier to do with 3/32.
Edit
The test I took was for pressure pipe. Isn’t D1.1 for structural steel? There is probably a wps for your test. Any and all allowances and limitations are on that paper.
Re: 5G Hot Pass
Posted: Thu Dec 21, 2017 7:26 pm
by Henry Utley
Yep, it is structural code.
Re: 5G Hot Pass
Posted: Thu Dec 21, 2017 9:26 pm
by Farmwelding
Poland308 wrote:the Test I took allowed for use of 3/32 or 1/8. But sch 40 pipe is so thin that it’s much easier to do with 3/32.
Edit
The test I took was for pressure pipe. Isn’t D1.1 for structural steel? There is probably a wps for your test. Any and all allowances and limitations are on that paper.
ASME code?
If it is for a job ever contact the test supervisor possibly?
Re: 5G Hot Pass
Posted: Thu Dec 21, 2017 9:50 pm
by Poland308
Re: 5G Hot Pass
Posted: Fri Dec 22, 2017 10:45 am
by Henry Utley
Its not for a job, I'm learning to weld in high school. I have been through open root stick, tig, and mig on plate but pipe is a whole different deal.
Re: 5G Hot Pass
Posted: Sat Dec 23, 2017 12:01 am
by Poland308
Then try the 3/32.