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[MW:/] RE: 1191] Radiography of tube to tubesheet welds

By Materials & Welding

Regarding subject topic, please find attached tube to tubesheet radiography procedure followed for our one of the recent job….

 

Best regards,

 

Sunil S. Agrawal

Static Equipment Dept. (STEQU)

Engineering & Design Tecnimont ICB

101/102, Interface-11, Link Road, Malad (w), Mumbai - 400 064 ( +91.22.6777.7237 * s.agrawal@ticb.com

 

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Bathula Raghuram (Mumbai - PIPING)
Sent: Tuesday, October 07, 2008 11:54 AM
To: Materials-Welding (E-mail)
Subject: [MW:1191] Radiography of tube to tubesheet welds

 

 

 

-----Original Message-----

From: PEMMARAJU RAGHAVENDRA [mailto:rpe@hzw.ltindia.com]

Sent: Tuesday, October 07, 2008 5:30 AM

To: Bathula Raghuram (Mumbai - PIPING); skumarswami@yahoo.co.in

Subject: Re: [MW:1177] Radiography of tube to tubesheet welds

 

 

We have done extensive RT of such joints in the past.

We have adopted the back radiation technique in which the source shall be moving from the front side of the joint. We have used the roli camera without guide tube and only the cranking unit wire coupled with source pigtail shall be used.The film used was of AGFA D4 with a special type of cassette with a hole at the centre.Vide this hole on the film cassette, the source enters into its position in case of back radiation technique.

It is preferred to use low curie source of Ir-192 of the order 3 to 4Ci.

Refer the attached word file for the source and film setup.

 

Instead of Gamma rays, you may use micro-focus X ray machine with hooded anode target which was developed by Sasol.

 

 

regards,

RPE

 

 

Larsen & Toubro Limited

www.larsentoubro.com

 

This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.

 

 

From: Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com>

Subject: [MW:1177] Radiography of tube to tubesheet welds

To: "Materials-Welding (E-mail)" <materials-welding@googlegroups.com>

Date: Wednesday, 1 October, 2008, 1:48 PM

 

Can anybody has experience with performance of RT on tube to tubesheet welds,

please share details for both techniques (i.e. back radiation and forward

radiation), equipment literature if any for this type RT.

 

 

 

 


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