There is no direct method to measure the magnitude of excess penetration on small bore closed butt welds.
The possibilities to get conclusion are as below.
1. Highly skilled RT film interpretation expert can give proper feedback.
2. Keep mock up test pieces of welder along accepted RT films and compare these films with the production joint RT films. You may get some input.
3. Boroscope may be used to get an idea of internal penetration of the production weld. For small bore there could be limitation while turning probe/cable/camera tip.
Regds/Jignesh
On Wednesday, 18 February 2015 12:54:50 UTC+5:30, George Dilintas wrote:
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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