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Cryogenic double wall tank internal inspection - required?

From: khaiis@yahoo.com [1313] 0 Stars
Date: Thursday, March 15, 2012
Time: 7:30:57 PM
Remote Name: 203.82.87.242

Comments

Hi.. Ive double wall LPG storage tank suspended deck at inner tank sized 44m diameter which had never being internally inspected for 28 years. The inspection group had done the RBI and presented the case, which require the tank to immediately shutdown for internal inspection of course involved hugh cost & long duration. From design, the tank was designed to API 620 App. R.There are school of practise mentioned that double wall cryogenic tank is internally free maintenance, not require internal inspection if the temperature maintained at all time subzero. Is that so ? As for inspector, it poses extremely high risk especially to the inner tank suspended deck roof, fittings and the facts that it is ageing. Your opinion and sharing is appreciated.

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