P/V valves Hammering – why is it a problem?

Fire & Explosions on tankers

With the implementation of IMO MSC/Circ. 677 in 1994 it became de facto forbidden to manufacture, bring to the market and install, P/V valves suffering from hammering, but since then not much has happened and still today, the problem created by using pure weight loaded valve with a booster plate remains and are a liability that causes loss of lives and property.

IHS Chemical tanker casualty database contains 45 cases of fire & Explosions between 2009 and 2015 with a total of 28 lost lives!

But how can P/V Valves hammering be such a problem? – please see the video!

 

Posted by jensen

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