This standard specifies the classification, requirements, test methods, marking, packaging, etc. of petroleum storage tank breathing valves. This standard applies to tank breathing valves installed on crude oil, gasoline, kerosene and other light oil storage tanks.
SY/T 0511-1996 history
2011SY/T 0511.1-2010 Oil tank appurtenances.Part 1:Breather valve
1996SY/T 0511-1996 Petroleum storage tank breathing valve