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  1. Even Hestnes

    Swedish Cast Iron Steam Vessel from 1966

    Thanks for answers. Yes. PED and pssr is very clear. PSV must be no higher than mwp. However. The definition has somewhat changed over the years on what is designed max working pressure (calculated) and what is operational max working pressure (tested). So that is what I am really trying to...
  2. Even Hestnes

    Swedish Cast Iron Steam Vessel from 1966

    Hi, We have a cast iron steam vessel built by KMV from 1966. the vessel was certified to a maximum working pressure of 3.5 bar and was tested to 7 bar. The vessel need to operate frequently at 3.5 bar due to process requirements. my predecessor was instructed by the company setting up the PRV...

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