[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

[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?

[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.

[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.

[Henry Utley]

Is a 3/32 for the hot pass what D 1.1 code wants?

[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.

[Henry Utley]

Yep, it is structural code.

[Farmwelding]

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?

[Poland308]

D1.1 is AWS. ANSI
https://law.resource.org/pub/us/cfr/ibr ... 1.2000.pdf

[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.

[Poland308]

Then try the 3/32.