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

Reason To Fireproof Saddles Only


4 replies to this topic
Share this topic:
| More

#1 kc45

kc45

    Junior Member

  • Members
  • 10 posts

Posted 16 June 2022 - 07:15 PM

Hi, I was referencing API 2218 Fireproofing Practices in Plants and came across the following finding.

 

Say a vessel is at risk of failure due to fires, why does API 2218 recommends that for vessels elevated on exposed steel legs, the leg supports are to be fireproofed.

 

Why isn't the entire vessel being fireproofed instead to delay fire risk.



#2 Pilesar

Pilesar

    Gold Member

  • Members
  • 967 posts

Posted 16 June 2022 - 10:12 PM

If the structure fails, the vessel falls and the piping comes loose, leading to loss of containment with no recovery. If the pressure vessel remains in place, it can be protected from overpressure with relief valves, sprinkler systems, etc.



#3 breizh

breizh

    Gold Member

  • Admin
  • 5,420 posts

Posted 16 June 2022 - 10:35 PM

hi,

Consider to read : https://www.eng-tips....cfm?qid=434810

 

Breizh 



#4 kc45

kc45

    Junior Member

  • Members
  • 10 posts

Posted 16 June 2022 - 10:56 PM

hi,

Consider to read : https://www.eng-tips....cfm?qid=434810

 

Breizh 

Thanks for the link!

 

So essentially, the reason to fireproof the supports is so that the vessel does not topple down and spill more hydrocarbon leading to further escalation. Also because the supports are closer to the source of fire which in this case of discussion is pool fire.

 

Is this reason still valid for

i) jet fire scenarios?

ii) a gas filled vessel.



#5 breizh

breizh

    Gold Member

  • Admin
  • 5,420 posts

Posted 17 June 2022 - 01:45 AM

Hi,

You may find pointers in the link attached :

https://www.hse.gov....rpdf/rr1120.pdf

 

Regarding gas filled vessel you need to consider that the Cp of the gas is much less than of the liquid meaning little or no heat absorption by the chemical in case of pool fire.

Breizh






Similar Topics