Re: [MW:22889] Excess penetration measurment in Radiograph

First you need to determine what is your requirement.

1. Is it required for small diameter tubes where precise flow is required.

2. Is it required for Big Diameter Piping.

For small diameter tubing, you can try a steel ball run test. For the ID of the tube, determine the excess penetration acceptable and force a steel ball of applicable diameter through the tube. If it passes successfully, accept the Joint or reject simultaneously.

For Big diameter piping, Low density is an indication of the excess penetration in the RT Film. There is no acceptable exact measure of the density using densitometer. 

 

Thanks & Regards

J.Gerald Jayakumar
0091-9344954677

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From: "george.dilintas@gr.bureauveritas.com" <george.dilintas@gr.bureauveritas.com>
To: materials-welding@googlegroups.com
Sent: Wednesday, February 18, 2015 12:54 PM
Subject: Re: [MW:22888] Excess penetration measurment in Radiograph

On my opinion extreme low density at the root area could be an indication of excess penetration.
The most reliable method to measure excess penetration is UT thickness measurement

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04


sundarrajan kumaraswamy ---18/02/2015 05:04:58---  How to measure the excess penetration from the Radiograph of  Small bore piping  DWDI superimpose

From: sundarrajan kumaraswamy <ksraja15@gmail.com>
To: materials-welding@googlegroups.com
Date: 18/02/2015 05:04
Subject: [MW:22887] Excess penetration measurment in Radiograph
Sent by: materials-welding@googlegroups.com

---

  How to measure the excess penetration from the Radiograph of Small bore piping  DWDI superimpose Radiograph shows low density near the inner wall,
what is acceptance criteria for excess penetration as per ASME B 31.3 code, Please clarify the IMAGE CONTRAST GRAPH method .

Regards,

K.Sundar Rajan

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