Aikin Zamewar Zamewar Zamewar Bututun API 7K Nau'in DU
Akwai nau'ikan bututun haƙa rami guda uku na jerin DU: DU, DUL da SDU. Suna da babban kewayon sarrafawa da nauyi mai sauƙi. A cikin wannan, ramukan SDU suna da manyan wuraren hulɗa a kan taper da ƙarfin juriya mai girma. An tsara su kuma an ƙera su bisa ga API Spec 7K Specification don kayan aikin haƙa da gyaran rijiyoyi.
Sigogi na Fasaha
| Yanayi | Zamewa Girman Jiki (in) | |||||
| 4 1/2 | 5 1/2 | 7 | ||||
| DP OD | DP OD | DP OD | ||||
| in | mm | in | mm | in | mm | |
| DU | 2 3/8 | 60.3 | 3 1/2 | 88.9 | 4 1/2 | 114.3 |
| 27/8 | 73 | 4 | 101.6 | 5 | 127 | |
| 3 1/2 | 88.9 | 4 1/2 | 114.3 | 5 1/2 | 139.7 | |
| 4 | 101.6 | 5 | 127 | 6 5/8 | 168.3 | |
| 4 1/2 | 114.3 | 5 1/2 | 139.7 | 7 | 177.8 | |
| DUL | 2 3/8 | 60.3 | 3 1/2 | 88.9 | 4 1/2 | 114.3 |
| 27/8 | 73 | 4 | 101.6 | 5 | 127 | |
| 3 1/2 | 88.9 | 4 1/2 | 114.3 | 5 1/2 | 139.7 | |
| 4 | 101.6 | 5 | 127 | 6 5/8 | 168.3 | |
| 4 1/2 | 114.3 | 5 1/2 | 139.7 | 7 | 177.8 | |
| SDU | 3 1/2 | 88.9 | 4 1/2 | 114.3 | ||
| 4 | 101.6 | 5 | 127 | |||
| 4 1/2 | 114.3 | 5 1/2 | 139.7 | |||
| 5 | 127 | 6 5/8 | 168.3 | |||
| 5 1/2 | 139.7 | 7 | 177.8 | |||
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