| Std ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status |
| GB/T 50493-2019 | English | 899 |
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5 days [Need to translate]
|
Specification for design of combustible gas and toxic gas detection and alarm for petrochemical industry
| Valid |
| GB 50493-2009 | English | 85 |
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0--9 seconds. Auto-delivery
|
Specification for design of combustible gas and toxic gas detection and alarm for petrochemical industry
| Obsolete |