Special Alloy Steel for Geological Drilling Pipe with good bending strength for coal mine
Special Alloy Steel Geological Drilling Pipe with good bending strength with 34 to 60 dia.
Combined with the most advanced scientific research results both in domestic and overseas, our prouction technology has become perfect.
The geographical drill stem is made of top-quality special geographical alloy steel pipe, and the joints is onf top quality alloy steel and through vaccum quenching and tempering treatment, with higher fatigue resistance and shearing strength. With advanced friction welding technology and German numerical controlled production equipent, to get the advantages of high bending strength, firm welds, can meet the demand of the straightness of deep-hole drilling, with higher fatigue resistance and longer service life.
OEM is accepted.
| S.N | Specification(mm) | Production technology | Connecting method | ||
| Dia. | Length | Thread | |||
| 1 | Φ34 | 500--3000 | Taper thread | Friction welding | Female and male |
| 2 | Φ42 | 500--3000 | Taper thread | Friction welding | Female and male |
| 3 | Φ50 | 500--3000 | Taper thread | Friction welding | Female and male |
| 4 | Φ63.5 | 500--3000 | Taper thread | Friction welding | Female and male |
| 5 | Φ73 | 500--3000 | Taper thread | Friction welding | Female and male |
| 6 | Φ89 | 500--3000 | Taper thread | Friction welding | Female and male |
| 7 | Φ35 | 500--3000 | Rectangle female thread | Built-in threading | Joint |
| 8 | Φ42 | 500--3000 | Rectangle female thread | Built-in threading | Joint |
| 9 | Φ50 | 500--3000 | Rectangle female thread | Built-in threading | Joint |
| 10 | Φ60 | 500--3000 | Rectangle female thread | Built-in threading | Joint |
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