Flexible hose attached directly to API 650 tank?

[geesamand]

I have an application where I'd like to attach a flexible hose (3/8" dia) directly to an API manway. It will be normally connected to the process and become a leak path of it were to fail or be damaged. Therefore I am doing diligence to see if this is permitted.

Corporate standards/practices will be addressed. Does API allow/deny this practice? If so, where can I review the details of this?

Thanks,

 

[JStephen]

I think API-650 would address the detail of a coupling in the shell or in the manway cover plate, but doesn't address what is attached beyond that point.

 

[IFRs]

JStephen is correct. API 650 tells you how to design the nozzle but stops at the flange. You could put a check valve on the flange so liquid can come into the tank but not out...