From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Potter, Richard
Sent: Friday, November 12, 2010 9:30 AM
To: materials-welding@googlegroups.com
Subject: [MW:8224] RE: 8223] Hydrotest
Our experience with hydrostatic testing is "as the temperature increases the pressure will follow."
The same works in the inverse. "as the temperature decreases the pressure will decrease".
We try to perform our hydros early in the morning. The temperature is cool and when we set the pressure it stays pretty stable. It may fluctuate a couple pf pounds but not a significant amount.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Eduardo Calva
Sent: Friday, November 12, 2010 9:21 AM
To: materials-welding@googlegroups.com
Subject: [MW:8223] Hydrotest
Hi all¡¡¡
Please could some of you tell me about changes of pressure with changes in temperature?
We have done a hydrotest twice on the same pipeline trap and both were rejected by the cliente because next:
1.- Firstone was rejected because pressure and temperature decrease
2.- Second one was rejected because temperature decrease and pressure keep without low.
And the main question is:
Does the pressure have to change by changing the temperature?
Eduardo Calva
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.
**************************************************************************************The contents of this e-mail message and any attachments are confidential and are intended solely for the addressee. If you have received this transmission in error, please immediately notify the sender by return e-mail and delete this message and its attachments. Any unauthorized use, copying or dissemination of this transmission is prohibited. Neither the confidentiality nor the integrity of this message can be vouched for following transmission on the Internet.**************************************************************************************
No comments:
Post a Comment