Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

3

Requirement Of Full Bore Isolation Valves At Psv Inlet And Outlet As W


2 replies to this topic
Share this topic:
| More

#1 SawsanAli311

SawsanAli311

    Gold Member

  • Members
  • 93 posts

Posted 08 December 2019 - 11:35 PM

Dear All,

I would like to seek your views on the following:

- Requirement for full bore isolation valves at PSV inlet.. ASME SEC VIII recommends them to be full bore by stating'' full area stop valves'' . While API 520 Part II removed this requirement in its latest revision.
- Requirement for FB isolation valves downstream the PSV
- Requirement for full bore isolation valves downstream the restriction orifice which is on emergency blowdown valves.

Thanks

Regards,



#2 breizh

breizh

    Gold Member

  • ChE Plus Subscriber
  • 4,549 posts

Posted 09 December 2019 - 08:05 AM

Hi ,

http://webwormcpt.bl...-spare-psv.html

 

Consider the link above to support your work , please read it carefully ( 2 PSV, isolation valves , car seal ,100% flow path, etc ) 

 

Breizh  


Edited by breizh, 10 December 2019 - 02:32 AM.


#3 Chemitofreak

Chemitofreak

    Gold Member

  • Members
  • 190 posts

Posted 13 December 2019 - 01:32 AM

My two cents:

 

The reason for using Full Bore valve for isolation of PSV

 

1) Low pressure drop

 

2) Allows no liquid pocket formation in the piping 






Similar Topics