This standard specifies the marking content, body material marking code, marking method, marking font and size, marking position, etc. of marine valves and piping accessories. This standard applies to the marking of marine valves and piping accessories.
GB/T 3032-2014 Referenced Document
GB/T 1047-2005 Pipework components-Definition and selection of DN (nominal size)
GB/T 1048-2005 Pipework components-Definition and selection of PN