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

3-Stage Propane Ref Performance

1

Relief Valve For Lng Vaporizer

relief valve

3 replies to this topic
Share this topic:
| More

#1 August

August

    Veteran Member

  • Members
  • 35 posts

Posted 15 June 2017 - 07:00 AM

I have a vaporizer: LNG to NG

 

Tube side is the process side. There are two ESD valves at the inlet and outlet of tube side to block the evaporator.

 

We need to size the relief valve installed at the outlet line for the situation when the HX is blocked.

 

How to do that exactly?  Thumb of rules?

 

Thanks.



#2 fallah

fallah

    Gold Member

  • ChE Plus Subscriber
  • 4,283 posts

Posted 15 June 2017 - 01:19 PM

I have an evaporator: LNG to NG

 

Tube side is the process side. There are two ESD valves at the inlet and outle of tube side to block the evaporator.

 

We need to size the relief valve installed at the outlet line for the situation when the HX is blocked.

 

How to do that exactly?  Thumb of rules?

 

Thanks.

 

August,

 

The PSV set pressure would be the tube side design pressure...

The relief load can be estimated based on the method mentioned in API 521 for fire case but with heat source of heating fluid instead fire...



#3 Bobby Strain

Bobby Strain

    Gold Member

  • Members
  • 2,174 posts

Posted 16 June 2017 - 01:06 PM

But you must also explore other scenarios. Such as blocked outlet. And route the discharge to a system that will accept LNG at -150 C.

 

Bobby


Edited by Bobby Strain, 21 June 2017 - 11:35 AM.


#4 IGC

IGC

    Junior Member

  • Members
  • 18 posts

Posted 21 June 2017 - 04:01 AM

What kind of heat exchanger is it?  Ambient air vaporiser?






Similar Topics