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| Chinese National Standard Category: Marine pipe fittings |
| English Title: | Marine cast iron pipe flanges |
| Chinese Title: | 船用铸铁法兰(四进位) |
| Standard No.: | GB 2503-1989 |
| Category No.: | U55 |
| Issued by: | China State Shipbuilding Corporation |
| Issued on: | 1989-03-31 |
| Implemented on: | 1989-12-1 |
| Status: | superseded |
| Superseded by: | GB/T 17241.6-2008 Integral cast iron flanges |
| Superseded on: | 2011-7-1 |
| Abolished on: | 2009-04-01 |
| Superseding: | GB 2503-1981 |
| Word Count: | 2500 words |
| Similar Standards: | CB 62-1976 CB 798-1979 CB 576-1967 CB 570-1979 CB 574-1967 CB 562-1968 CB 568-1967 CB 539-1967 CB 678-1968 CB 303-1977 CB 538-1967 CB 571-1968 CB 902-1979 GB/T 2506-2005 CB 631-1967 CB 685-1976 GB/T 43121.1-2023 GB/T 38782-2020 GB/T 37323-2019 GB/T 34032-2017 |
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