International Organization for Standardization (ISO)
Latest
ISO/R 538:1967
Scope
The symbols given in the tables apply to principal parts and appliances and have been classified in the following manner: General conventional signs Pipes and pipe joints Valves, gate valves, cocks and flaps Control and regulation parts Appliances Fittings Indicating and measuring instruments
ISO/R 538:1967 history
1967ISO/R 538:1967 Conventional signs to be used in the schemes for the installations of pipeline systems in ships