Skip to main content

[MW:1197] Re: 1193] Re: Radiography of tube to tube sheet welds

By Materials & Welding
Documents attached  by Ragavendra and Agarwal is not disscussing about butt weld. Only about T-TS only. This is a improvement from the past (Only PT & LT)
 
S.Senthilkumar

--- On Thu, 9/10/08, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
From: Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com>
Subject: [MW:1194] RE: 1193] Re: Radiography of tube to tube sheet welds
To: materials-welding@googlegroups.com
Date: Thursday, 9 October, 2008, 12:30 PM

Of course we are not discussing for butt welds, any way we have conventional methods to perform RT of but welded (inner bore) tube to tube sheet joints.
 
Infact I was looking for a good (improved) technique, equipment for the normal tube to tube sheet weld. No doubt the posting from Mr..Raghavendra and Agrawal will clear my query to some extent.
 
I was looking for customized equipment for this type of welds. if any body has details about the manufacturers, please share
 
Thanks!
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of Tirumala B N Tagore
Sent: Thursday, October 09, 2008 8:55 AM
To: materials-welding@googlegroups.com
Subject: [MW:1193] Re: Radiography of tube to tubesheet welds

the detail shown is not applicable to examine butt welded type weld.
for your info.
regards,
tagore

On Tue, Oct 7, 2008 at 9:23 AM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:


-----Original Message-----
From: PEMMARAJU RAGHAVENDRA [mailto:rpe@hzw.ltindia.com]
Sent: Tuesday, October 07, 2008 5:30 AM
To: Bathula Raghuram (Mumbai - PIPING)
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


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.



Connect with friends all over the world. Get Yahoo! India Messenger. --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---

Comments

Post a Comment

Popular posts from this blog

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

[MW:5202] RE: 5200] NDT after PWHT

By Materials & Welding
------------------------------------- Interpretation:  I‑89‑14 Subject:         Section I (1986 Edition, 1987 Addenda), PW‑11,                  NDE Prior to PWHT Date Issued:     December 15, 1988 File:            BC88‑393   Question: Does PW‑11 require that NDE be performed on welds after they have been subjected to the postweld heat treatment required by PW‑39?   Reply: No, unless the conditions described in PW‑11.2.2 exist. ---------------------------------------------- Interpretation:  VIII-1-98-09 Subject:         Section VIII, Division 1 (1995 Edition, 1996 Addenda); NDE                 ...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more