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| Chinese National Standard Category: Valve |
| English Title: | Metal valves - Face to face;end to end;center to face and center to end dimensions |
| Chinese Title: | 金属阀门 结构长度 |
| Standard No.: | GB/T 12221-2025 |
| Category No.: | J16 |
| Issued by: | SAMR, SAC |
| Issued on: | 2025-10-31 |
| Implemented on: | 2026-5-1 |
| Status: | to be valid |
| Superseded by: | |
| Superseded on: | |
| Abolished on: | |
| Superseding: | GB/T 12221-2005 Metal calves--Face to face,end to end,center to face and center to end dimensions |
| Word Count: | 21000 words |
| Similar Standards: |
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