Skip to main content

Re: [MW:11457] MPI forgotten

Hi Shashank,

The purpose for MT on bevel is to confirm lamination free prior to welding so as to avoid separation, and or crack which should show up with RT.  However RT could be dicey with extended lamina separation especially at the HAZ And planar cracks if  parallel with source/focal point orientation. I suggest RT and ADD UT ZERO DEGREE HAZ FULL SCAN AND ANGLE PROBE ON WELD.   


From: Vimal Mistry <vimal.mistry@suzlon.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Cc: "adkrishnakumar@yahoo.co.in" <adkrishnakumar@yahoo.co.in>
Sent: Friday, June 24, 2011 2:54 AM
Subject: RE: [MW:11450] MPI forgotten

Dear Shashank,
 
You can convince with RT acceptance however results of RT acceptance stand that you had followed write welding procedure except oversight MPI.
 
Regards,
Vimal
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Shashank Vagal
Sent: Friday, June 24, 2011 12:25 PM
To: materials-welding@googlegroups.com
Cc: adkrishnakumar@yahoo.co.in
Subject: [MW:11448] MPI forgotten
 
Dear members,
By some oversight, MPI of one pipeline welds was not done on cut bevels. The PL section is now ready for hydrotest. Construction Code is API 1104 1999 Ed.
RT is acceptable. But this lapse is punchlisted. How do you resolve the issue?
Cutting and rewelding is not permitted.
Best regards,
Shashank Vagal
--
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.

- Disclaimer--

This email and any files transmitted with it are confidential and may be privileged or otherwise protected from disclosure and are intended solely for the use of the entity / individual to whom they are addressed. If you have received this email in error or If you are not the intended recipient, please notify the sender immediately by way of telephone or email and delete this message and any files transmitted from your system. Please note that any views presented in the email are solely those of the author and do not necessarily represent those of the organization. While all care has been taken to avoid viruses the recipient is advised to check this email and attachments for presence of viruses. The organization accepts no liability on this account.
--
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

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...

Materails FAQs

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...

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

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...