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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 12237-2021 |
Steel ball valves for petroleum, petrochemical and allied industries 石油、石化及相关工业用的钢制球阀 |
China National Standards Steel ball valves |
 English PDF |
| GB/T 12237-2007 |
Steel ball valves for petroleum, petrochemical and allied industries 石油、石化及相关工业用的钢制球阀 |
China National Standards Steel ball valves |
English PDF |
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