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  • Users: Al83
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  1. Al83

    Welding Deformations - Split T

    Hi Ehzin No it is not possible since it is larger than a standard pipe.
  2. Al83

    Welding Deformations - Split T

    Hi LittleInch I am currently welding the branch on shell before cutting the hole as I have a very large boring machine, i can simply machine them to size on the inside after oxy cutting the hole. I have not tried to open the hole first to be honest as i always thought that the uncut hole will...
  3. Al83

    Welding Deformations - Split T

    Hi LittleInch, Thanks for your reply. Unfortunately most of the times the OD of the branch is larger than a standard pipe, and mind you the shell is set to fit on a standard pipe so it has a larger OD too. So splitting a standard tee is not an option, it just has to be made from scratch. But I...
  4. Al83

    Welding Deformations - Split T

    Thanks all, I guess preheat and rolling in full encirclement before splitting the tee is the answer. Time to start reading about how to preheat. Thanks all, you r legends
  5. Al83

    Welding Deformations - Split T

    Thank DekDee Unfortunately we fabricate only no installation services. Do you think cutting the hole first will help if branch to shell weld is to be done at our shop? If that is the case, why if you dont mind asking?
  6. Al83

    Welding Deformations - Split T

    Thanks gtaw, Great advice. The stainless steel is only an example, but vast majority is Gr70 steel. We make a lot of those a year. Any specific advice for carbon steel? Pleas see see attached photo for...
  7. Al83

    Welding Deformations - Split T

    Thanks r6155. Do you think the hole should have been cut before welding? What is the reason for that? (I want to learn). I thought cutting the hole after will provide more support to the shell. Maybe I am missing something essential.If there is a reference book/code I will appreciate very much...
  8. Al83

    Welding Deformations - Split T

    Hi r6155, What you see is a fitting that consumed days of jacking to realign into that beautiful fitting you have in the photo. However, I was after a way to reduce/eliminate that effort. Yes, I agree, the welding of nozzle to branch is excessive indeed. It is a client design unfortunately...
  9. Al83

    Welding Deformations - Split T

    Thanks SJones, r6155, Assume the split shell is ID 42", length (through the page) is 72", Branch is 36" ID and flange is 36" 300#. Split shell thickness is 0.5in. Branch is also made from rolled from 0.5in thick plate and profiled to suite . Assume plates are ASTM A516 Gr70. Please see attached...
  10. Al83

    Welding Deformations - Split T

    Hi All, I do fabricate split tee fittings for hot tapping operations. They give me a big headache due to excessive deformations although heavily supported before welding starts. I roll those in 2 x half circles. One of these halves has the branch and flange welded on top. They are all thinner...

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