It should also be concerned that whether the alum roof is joint by adhesives. Adhesives might be eroded by petrochemicals, which affects the durability of alum roof.
Agree with IFRs, bolt connection is hard to be vapor-tight.
However, It a little weird that API 650 H.4.1.3 mentions seams are vapor-tight but H.4.3.1 allows seams to be connected by bolts.
Deck seams testing is mentioned by H.6.2.
It seems to alum floating roof is impossible to prudently pass...
To LittleInch
Thank for your response
With foam chamber and deflection plate connecting to shell inside, and let the foam flow through the shell by gravity to the seal area..
To Geoff13
Thank for your sharing
I will check the 5.4 and yes, the tank is pontoon
Hello everyone
I wondering that is it necessary to build the foam dam in the internal floating roof tank.
I check NFPA 11, and it seems to not describe directly.
Thank for all your replies.
Finally, I read Annex C, EFR and it talks about the vent on pontoon.
I think both are in the similar concern between EFR and IFR. In Annex C, it says "vent" is to protect against internal or external pressure for compartment.
Also, the requirement of manhole neck...
Hi, everybody
I have a question about the API 650 H.4.1.7.
If we want to design the metallic pontoon floating roof, annular closed flotation compartment, due to H.4.1.7 the manhole cover shall have suitable vent.
What is suitable vent? is it free vent?
And I still confuse about "closed...
