This standard specifies cylindrical glass level gauges with self-closing valves (hereinafter referred to as level gauges) for use in ship water tanks and ship oil tanks not subject to SOLAS.
JIS F 7212:2004 history
2004JIS F 7212:2004 Shipbuilding -- Tube glass type level gauges with self closing valves
1996JIS F 7212:1996 Shipbuilding -- Oil level gauges with self closing valves