Frangible Roof Documentation
Frangible Roof Documentation
(OP)
Hello,
I'm a new process engineer and I'm considering a emergency venting for a storage tank (200ft diameter). The tanks have open vents that are okay for normal venting (guided by API 2000). However, in case of fire or emergency venting, the open vents will not be enough. Then I proceed to consider frangible roof as mean of emergency venting.
I have no idea how a frangible roof tank is constructed. I read through API 650 12th Ed. 5.10.2.6 where they layout 5 conditions for compliance. However, would the designer indicate that roof is frangible anywhere? I found no documentation that explicitly state that the roof is frangible. Where do the engineer typically document these things?
I could go through the drawings and see if tank construction meets API 650 5.10.2.6, though I'm no expert in tank construction, and some information might not be available.
Any advice how to can find out if a roof is frangible?
Thanks
I'm a new process engineer and I'm considering a emergency venting for a storage tank (200ft diameter). The tanks have open vents that are okay for normal venting (guided by API 2000). However, in case of fire or emergency venting, the open vents will not be enough. Then I proceed to consider frangible roof as mean of emergency venting.
I have no idea how a frangible roof tank is constructed. I read through API 650 12th Ed. 5.10.2.6 where they layout 5 conditions for compliance. However, would the designer indicate that roof is frangible anywhere? I found no documentation that explicitly state that the roof is frangible. Where do the engineer typically document these things?
I could go through the drawings and see if tank construction meets API 650 5.10.2.6, though I'm no expert in tank construction, and some information might not be available.
Any advice how to can find out if a roof is frangible?
Thanks





RE: Frangible Roof Documentation
If it is not specified there, the only way to determine if the roof is frangible is by checking the drawings or tank. Since your tank is 200ft diameter, is is very likely that the roof will have sufficiently small reinforcement area to be considered frangible. The details of welding may dictate the final result.
RE: Frangible Roof Documentation