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Inconel clad, heavy wall CS piping vs welded attachments

Inconel clad, heavy wall CS piping vs welded attachments

Inconel clad, heavy wall CS piping vs welded attachments

I have a substantial amount of Inconel clad CS piping ranging from 8" - 32".  The average WT of the CS is 19mm, with a 3mm thick Inconel cladding.  My problem is that I have numerous 3/4" instrument connections that require weldolet or weldoflange connections.  I must ensure that the Inconel coats the inside of the instrument connection & the drilled out section of the CS piping.  My Client states that oversize drilling and Inconel weld overlay is not acceptable as the 3/4" hole is too small for such actions.  He feels that the welder will make a mess of the overlay in such a heavy walled pipe and small hole.  Can anyone suggest a way to weld a 3/4" solid Inconel weldolet to 19mm thick CS piping (Inconel clad)?  Many thanks.

RE: Inconel clad, heavy wall CS piping vs welded attachments

The best answer for this question is:
 You must use a inconel coupling with proper size and class.You must create a proper groove for full peneteration of weld and use nickel base electrode or filler materials.
Best regards,

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