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the four national valve standards will be implemented on may 1, 2020
release time:2019/11/16
recently, the state administration for market supervision and administration of china (standardization administration of china) approved and issued 343 national standards and 2 revision orders of national standards, including "dimensions, product geometric specifications (gps) and tolerance values of radial bearing stop groove and stop ring".
|
no |
standard coding | substitute standard number | ||
|
1 |
gb/t 12234-2019 |
steel gate valve with stud to cover for petroleum and natural gas |
gb/t 12234-2007 |
2020-5-1 |
|
2 |
gb/t 22652-2019 | surfacing welding process evaluation of valve sealing surface | gb/t 22652-2008 | 2020-5-1 |
|
3 |
gb/t 24925-2019 | technical conditions of cryogenic valves | gb/t 24925-2010 | 2020-5-1 |
|
4 |
gb/t 38202-2019 | installation, use and maintenance of all welded valves | 2020-5-1 |
the next：certification and testing of valves