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Re: [MW:20667] In-Service pipe damage

By Materials & Welding
Dear,
 
Apart from checkign remaining thickness, as a precautionary measures you can consider wrapping with coating of polymeric/composite products.
We are using such products at high pressure on our plant site.
So just explore vendors of such products They will suggesst you some of their product based on your operating conditions. e.g belzona, thortex etc

Regards..
Saqib Jalal
Inspection & Reliability Engineer
Contact # +966(59)4871894


On Fri, Apr 25, 2014 at 9:21 AM, <george.dilintas@gr.bureauveritas.com> wrote:

Please note that you have 12.5% tolerance on thickness.
If the remaining thickness is above calculated thickness + corrosion allowance then just smooth the dent.
If your remaining thickness is below the calculated thickness + corrosion allowance, then you can use ASME VIII-1 to evaluate the effect of a local thinning.

    best regards

    Dr. Georgios Dilintas

    Authorized Nuclear Inspector
    Authorized Inspector Supervisor
    API 510 Inspector

    I&F REGIONAL TECHNICAL MANAGER
    BUREAU VERITAS HELLAS

    Tel: +30 210 40 63 113/4
    Fax: +30 210 40 63 118
    Cell: +30 69 44 64 62 04
    (See attached file: Dilintas_George.vcf)

Saidur Rahman ---25/04/2014 01:51:12---Dear Experts, During Pipeline crossing of a Cross-Country pipeline project(30" OD API 5L

From: Saidur Rahman <saidur04cuet@gmail.com>
To: materials-welding@googlegroups.com
Date: 25/04/2014 01:51
Subject: [MW:20664] In-Service pipe damage
Sent by: materials-welding@googlegroups.com



Dear Experts,

During Pipeline crossing of a Cross-Country pipeline project(30" OD API 5L X-60) In-Service pipe is damaged by Excavator teeth due to bad workmanship. Damage depth upto 2 mm. (In-Service pipe OD=30"; API 5L X-52. Pipeline containing Natural gas. Pressure approximately 1000 psig. No accident happened.) It is not possible to shut down the pipeline to repair because one region of the country will not get gas because only one supply line. As a Mechanical Engineer i know this damage portion is a point of stress concentration. Anytime anything can happened. What should i do.

Regards,

Saidur
QA/QC

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