I would assume that time lapse between 1st and 2nd pass would be stated in WPS and PQR, since you exceeded the limit imposed by WPS, it's a non-conformance, talk to client and seek for allowing preheat the pipe and continue welding, no need to cut and reweld the joint straight away without investigating. You could perform hardness tests using protable hardness tester to ascertain client.
I have seen max. time lapse of 30 min. between 1st and 2nd pass.
Cheers,
Manpreet Singh
On Sun, 27 May 2012 21:26:58 +0530 wrote
>DEARS, Yes, u need to cut and reweld. Mostly hotpass is to burn and float out wagon track present in root pass ,so time between root and hot pass is 5 to 10 minutes
Regards,
SENBE
On Tue, May 15, 2012 at 5:25 PM, jesti fer
Dear all,
We are doing 20" pipe line project with API 5L Gr.B material as per B31.4, Welding process SMAW (E6010 for root and rest with E 7018, both are up-hill) our welder welded one joint root pass and he kept this joint for long time. But our Qc instructed to cut and re-weld the joint. But the time between root pass and hot pass not mentioned in approved WPS and client specification also.
It necessary to cut and re-weld?
It is mentioned any were in the code (ASME or API)?
Please help me,,
Best Regards
--
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.
--
>
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.
>
 |
| Follow Rediff Deal ho jaye! to get exciting offers in your city everyday. |
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.
No comments:
Post a Comment