Re: HOT TAP OVER A PIPE SEAM WELD

From: <bruce.r.raymond@fluor.com>
Date: Sat Sep 01 2007 - 07:06:00 EDT

Gentlemen -I am presently heading up a project which involves 2 - 30" sub sea hot taps. Yesterday I talked to my contractor's expert on this & asked the very same question. He told me that they DO NOT want the seam aligned with the initial cutter head, but as long as there was no interference with the initial cutter head, they could bore the pipe with no problems, Also cutting through the weld seam provides an advantage, for besides inspection of the pipe, it allows inspection of the weld seam type & protrusion into the pipe itself. Since I am setting stopples in my hot taps this will allow specialized configuration of the stopple seats to allow for better seating. Also I have come across a different type of hot tap tee which can be applied above or below water, designed per B31.8, & is applied to the pipe with no welding required, neat stuff. Allows a hot tap with no hot work.

Paul Bowers <pbowers@pipingdesign.com> Sent by: <a href="/group/PipingDesign/post?postID=YoZJyA6kWQVBFExY5Hyy8crAYW-nDzoxeUpfitidnZWKvO77oW_Z6UHPT4uPlxeAKUyw0xZVAy6Ze9DJW_CVJ0I1xyMg9A">PipingDesign@yahoogroups.com</a> 09/01/2007 01:33 AM
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<a href="/group/PipingDesign/post?postID=YoZJyA6kWQVBFExY5Hyy8crAYW-nDzoxeUpfitidnZWKvO77oW_Z6UHPT4uPlxeAKUyw0xZVAy6Ze9DJW_CVJ0I1xyMg9A">PipingDesign@yahoogroups.com</a> cc

Subject
Re: [PipingDesign] HOT TAP OVER A PIPE SEAM WELD

sanjib basu wrote:

> If the Split TEE is not welded yet, Change the location.

I'm guessing from the size (42") of this proposed hot tap that possible tie-in locations are very limited. Just getting the tapping machine setup for this would be a challenge.

Paul

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[Non-text portions of this message have been removed] Received on Sat Sep 01 07:06:00 2007