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Casing Tube
W casings are made in DCDMA standards ,the most popular sizesand are AW, BW, NW, NWA, HW, and PW standards applied in geotechnial drilling.
Casing Tube Introduction
DCDMA standard BW NW HW PW NWT HWT casing,casing tube
W casings are made in DCDMA standards ,the most popular sizesand are AW, BW, NW, NWA, HW, and PW standards applied in geotechnial drilling.
Casing and the core tube specification
| Standard | Size | O.DxW | Material | Remark |
| GB/T16920-1997 | 73 | Φ73x4.5 | DZ240 | Length and thread depends on customers’ demands |
| 89 | Φ89x4.5 | DZ240 | ||
| 108 | Φ108x4.5 | DZ240 | ||
| 114.3 | Φ114.3x6.35 | DZ240 | ||
| 127 | Φ127x4.5 | DZ240 | ||
| 146 | Φ146x5 | DZ240 | ||
| 168 | Φ168x6.5 | DZ240 | ||
| 178 | Φ178x9 | DZ240 | ||
| DCDMA | AW | Φ57x4.3 | R780 | |
| BW | Φ73x6.35 | R780 | ||
| NW | Φ88.9x6.35 | R780 | ||
| HW | Φ114.3x6.35 | R780 | ||
| PW | Φ139.7x6.35 | R780 |
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