Langfang Baiwei Drill Co., Ltd.
Langfang Budweiser drilling tool manufacturing Co., Ltd
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The expansion method for in-place replacement utilizes specialized expander to generate controlled radial expansion forces within existing pipes. This uniformly enlarges or splits the old pipe diameter while simultaneously pulling new pipe into the expanded cavity. This single-pass process completes pipe rehabilitation by “expanding and replacing" without excavation or additional working pits.
| Items | Unit | ZGT315 | ZGT355 | ZGT400 | ZGT450 | ZGT500 |
|---|---|---|---|---|---|---|
| Rated power | KN | 30 | 30 | 30 | 30 | 30 |
| Power | KW | 4 | 4 | 4 | 4 | 4 |
| Length | mm | 720 | 800 | 810 | 850 | 895 |
| Diameter | mm | 335 | 375 | 420 | 470 | 520 |
| Maximum size after expansion | mm | 367 | 406 | 448 | 498 | 560 |
| Pull rod spec | mm | φ60或φ68 | φ60或φ68 | φ60或φ68 | φ60或φ68 | φ60或φ68 |
| Minimum diameter of the entry hole | mm | 350 | 390 | 450 | 500 | 550 |
| Required inner dimensions (length) of the well | mm | 650 | 730 | 740 | 780 | 825 |
