Re: Pressure Testing of Hot Tapping Stub welded onto a high temperature line.

There is a API code for hot tapping of pipelines , please refer the same for detail procedure and limitations . I think it is API 2220.

thanks

Goswami

• Original Message ----- From: ramanan ranjit <ranjitperu@yahoo.com> Date: Tuesday, August 2, 2005 10:11 pm Subject: [PipingDesign] Pressure Testing of Hot Tapping Stub welded onto a high temperature line.

> Hi everybody,
> Is it mandatory that the the hot tapping stubs welded
> on to a pipe line be pressure tested before performing
> hot tapping operation.
> If yes what is the methodologhy to be used for the
> pressure testing for high temperature lines (say
> operating at 700 deg F).I feel that hydrostaic testing
> using water is ruled out due to the high temperature
> and also the pneumatic testing using soap suds due to
> the same reason. Is there any alternate method or
> fluids that can be used for pressure testing.
> Thanking you in advance.
> Ranjit.
>
>
>
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Received on Wed Aug 03 03:06:00 2005