Main question is:
Does the pressure have to change by changing the temperature?
Ans: According to Gay Lussac law , Pressure is directly proportional to Temp..
PLz give the details of your equipment .
On Sat, Nov 13, 2010 at 12:36 AM, <William.Davis@dnv.com> wrote:
> obtain a pressure & temperature recorder to document pressure changes due to
> temperature change. (have seen 24 hr pressure tests that record pressure &
> temperature, significant change at sundown & sunup)
> ________________________________
> 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.**************************************************************************************
>
> --
> 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.
No comments:
Post a Comment