Re: [MW:30798] two Pipeline crossing

HI

There is no reference in the API 1104, but you have to got permission from the existing pipeline owner, who can give direction about the clearance between new and existing pipeline, because of pipeline details such as pressure, velocity, kind of medium and exiting pipeline coating systems to be given by them. those all times shall be considered during the excavation. 

Kindly get advise from your designer... 

Thanks and regards,

KRISHNASAMY MASANAM

Cell:             +91 98431 58057

WhatsApp: +91 94877 58057

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From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of QA/QC <adnanziad49@gmail.com>
Sent: Saturday, April 18, 2020 7:19 PM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: Re: [MW:30792] two Pipeline crossing

 

Tnx

do we have any standard mention that from API 

Le samedi 18 avril 2020 14:25:02 UTC+2, emmanuellawrenceu a écrit :

When crossing an existing pipeline, best practice demands that the new pipeline should be crossed below the existing to avoid upheaval buckling of the new pipeline since the top soil is already tampered. In that case a minimum safe distance should be maintained.

On Sat, Apr 18, 2020 at 12:32 PM QA/QC <adnan...@gmail.com> wrote:

Hello everyone 

durring welding of new pipeline 12'' we found that we are cross a pipeline in service  what is the correct procedure to do 

- we will cross our pipeline from the top or we should make it down the existing pipeline in service 

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