Scall
Chemical
- Oct 5, 2006
- 3
Hi Folks,
I'm designing a tank farm to be located in Texas. There are three low pressure, blanketed tanks connected to a flare stack. The emergency venting requirements (fire case) would lead to a very large flare header. My question is can I design the tanks with a weak roof-to-shell joint, or a weighted thief hatch, so that they relieve to atmosphere in the event of a fire? or do I need to connect them to the flare header? API 2000 seems to imply the former. NFPA 30 and OSHA 1910.106 seem to imply the latter. These three tanks would sit in the same dike as several other atmospheric tanks holding stable (high flash point) hydrocarbons. In the event of a pool fire, those tanks will relieve to atmosphere though open vents and weighted thief hatches.
Apologies if this has been answered elsewhere.
Thanks
Scall
I'm designing a tank farm to be located in Texas. There are three low pressure, blanketed tanks connected to a flare stack. The emergency venting requirements (fire case) would lead to a very large flare header. My question is can I design the tanks with a weak roof-to-shell joint, or a weighted thief hatch, so that they relieve to atmosphere in the event of a fire? or do I need to connect them to the flare header? API 2000 seems to imply the former. NFPA 30 and OSHA 1910.106 seem to imply the latter. These three tanks would sit in the same dike as several other atmospheric tanks holding stable (high flash point) hydrocarbons. In the event of a pool fire, those tanks will relieve to atmosphere though open vents and weighted thief hatches.
Apologies if this has been answered elsewhere.
Thanks
Scall