Sunday, January 22, 2012

Re: [MW:13543] Valve Back Seat Test

Hi,

Back seat is the test carried out to check tightness of "Back Seat" of valve.

As we know, pressure test is carried out to check integrity of the valve body, back seat test ensures that valve shall not leak when valve is fully open and pickings are untightened when valve is fully pressurized. Generally we mention in valve data sheet that , valve packing shall be replaceable under full pressure. This test is linked with that note. During test valve is fully opened (disc rest on back seat) & leakage is checked. Please cl.6.2.1 of API 598. This test can be combined with shell test.

Honestly speaking, nobody would dare to replace packing when valve is fully pressured in routine work.

 

Regards,

Vivek


On Sat, Jan 21, 2012 at 8:01 AM, Gopi Perumal <parinitaa2010@gmail.com> wrote:
Dear all,

Anybody can explain what is mean by Backseat test in Valve Testing? (API 598)

Thanks,
P Gopi

--
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:

Re: [MW:34832] Inquiry about Single Bevel with Back Grinding

Dear Uday, As per your question that one is called with backing only,Simple both side you are welding it is backing with strip or without st...