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  1. minhvu17

    Double-isolation and bleed valve and Double-block and bleed

    Hi all, I am very new to valve and pipeline. While reading through the API 6DSS, i have notice about definition of DIB and DBB which im not so clear of 1. Double-Block and Bleed Valve (DBB) – A single valve with two seating surfaces that, in the closed position, provides a seal against pressure...

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