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  1. joythejob

    Aluminium Floating Roofs for crude oil storage

    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.
  2. joythejob

    Oil penetration testing

    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...
  3. joythejob

    FOAM DAM hight

    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
  4. joythejob

    FOAM DAM hight

    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.
  5. joythejob

    H.4.1.7 manhole cover shall be provided with a suitable vent

    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...
  6. joythejob

    H.4.1.7 manhole cover shall be provided with a suitable vent

    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...

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