This standard specifies the parameters, markings, requirements, test methods, inspection rules, marking and packaging of marine deck valves (hereinafter referred to as deck valves) whose flange connection dimensions and sealing surfaces comply with GB/T 2501. This standard applies to the design, manufacture and acceptance of deck valves used for oil-water interface measurement in liquid cargo monitoring systems.
CB/T 4233-2013 Referenced Document
GB/T 1184-1996 Geometrical tolerancing--Geometrical tolerance for features without individual tolerance indications