This standard specifies level gauges with valves (hereinafter referred to as level gauges) with a maximum working pressure of 0.49 MPa for use in water tanks, oil tanks and low-pressure vessels used on ships not subject to SOLAS.
JIS F 7211:2004 history
2004JIS F 7211:2004 Shipbuilding -- Tube glass type level gauges with 5K valves
1996JIS F 7211:1996 Shipbuilding -- 5K level gauges with valves