This standard specifies the marking content, marking code, marking method, font, size and position of markings for marine valves and piping accessories. This standard applies to the marking of marine valves and piping accessories.
GB/T 3032-1989 history
2014GB/T 3032-2014 Marks for marine piping valves and fittings
1989GB/T 3032-1989 Marks for marine piping valves and fittings