Re: Welding on pipe filled with water

On Jan 21, 2007, at 2:55 AM, Ghulam Haider Khan Ghory wrote:

> Thank you for quick reply. But the situation in my case is
> different, there is no contact with water ( except cooling effect ).
> Water is inside the pipe and small plates are welded on outer surface
> of pipe ( thickness = 30 mm )

i was using the example of welding under water as a sort of worst case--if you can weld submerged, you can certainly weld with water on the inside only. You do want to be careful with weld procedures in this case, though since hot steel will pick up hydrogen. I don't have any idea about your welding people, your procedures, the actual attachment weld design, the loading or if you have a welding engineer available. My experience is that being picky about such things is always a good thing. If it were my assignment I certainly wouldn't let just anyone do that job.

Christopher Wright P.E. |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania