TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram, |
| Supply Ability | 20000 Tons per Year |
| Delivery Time | 30-45 Days |
| Packaging Details | in wooden boxes or in hexagonal bundles |
| Product name | GB/T9808 STM-R780 High Straightness Seamless Steel Tubes for Drilling |
| Material | ZT380 ZT490 ZT520 ZT540 ZT590 ZT640 ZT740 |
| Type | Seamless Steel tube |
| Surface | Oiled |
| Usage | Drilling |
| Length | 4-12.5m |
| OD | 33-340mm |
| WT | 2-28mm |
| Shape | Round |
| Brand Name | TORICH |
| Model Number | GB/T9808 |
| Certification | ISO14001:2008, TS16949, CE PED, TUV, API,BV |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram, | Supply Ability | 20000 Tons per Year |
| Delivery Time | 30-45 Days | Packaging Details | in wooden boxes or in hexagonal bundles |
| Product name | GB/T9808 STM-R780 High Straightness Seamless Steel Tubes for Drilling | Material | ZT380 ZT490 ZT520 ZT540 ZT590 ZT640 ZT740 |
| Type | Seamless Steel tube | Surface | Oiled |
| Usage | Drilling | Length | 4-12.5m |
| OD | 33-340mm | WT | 2-28mm |
| Shape | Round | Brand Name | TORICH |
| Model Number | GB/T9808 | Certification | ISO14001:2008, TS16949, CE PED, TUV, API,BV |
| Place of Origin | China | ||
| High Light | precision stainless steel tubing ，seamless carbon steel tube | ||
GB/T9808 STM-R780 High Straightness Seamless Steel Tubes for Drilling
our products apply to geological core drilling,water well drilling,hydrogeoligical drill,casing material for engineering drilling,core tube material and casing coupling Seamless Steel Tubes,ordinary drill pipe material and drill pipe joint Seamless Steel Tubes,rope coring drill pipe material and drill pipe joint Seammless Steel Tubes,drill collar material and drill collar lock joint Seamless Steel Tubes.
Size:
OD:33-340mm WT:2-28mm L:4000mm-12500mm
Steel Grade:
ZT380,ZT490,ZT520,ZT540,ZT590,ZT640,ZT740
The Production method:
Hot rolling(extrusion) or cold drawing(rolling) seamless method.
Delivery State:
Hot rolling(extrusion)steel tubes should be delivered with hot rolling condition or hot finished.Cold drawn(rolling) steel tubes should be delivered with hot finished.
Surface quality
There is no visual visible cracks,rolling, folding,scarring and abscission layer in the internal and external surfaces of the steel pipe.
Test:
Tensile tast
Ultrasonic inspection
Eddy current inspection
Magnetic flux leakage inspection
Tolerance of Outer Diameter and Wall Thickness
| Standard | Production Method | Tube Size | Tolerance | |
| GB/T 9808-2008 | Hot rolled | OD | (+1.0%D) or +0.65 (-0.5%D) -0.35 | |
| WT | ≤10 | (+15%S)or +0.45 (-10%S) -0.35 | ||
| >10 | (+12.5%S, -10%S) | |||
| Cold Drawn(rolled) | OD | ±0.50%D or ±0.20 | ||
| WT | ±8%S or ±0.15 | |||
| Q(N)/ T118-2010 | Cold Drawn | OD | OD | ±0.40%D or ±0.20 |
| WT | WT | ±7%S or ±0.15 | ||
Mechanical Property
| No. | Grade | Tensile Strangth Rm/MPa | Specifies the non-proportional extension strength Rp0.2/MPa | Percentage elongation after fracture A/% |
| No less than | ||||
| 1 | ZT380 | 640 | 380 | 14 |
| 2 | ZT490 | 690 | 490 | 12 |
| 3 | ZT520 | 780 | 520a | 15b |
| 4 | ZT540 | 740 | 540 | 12 |
| 5 | ZT590 | 770 | 590 | 12 |
| 6 | ZT640 | 790 | 640 | 12 |
| 7 | ZT740 | 840 | 740 | 10 |
| a Grade ZT520 measure RP0.5 bGrade ZT520 use tensile sample S4 S5 or S6 in GB/T 228 | ||||
Application:
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Who We are ? -------A professional steel pipes materials inventor, manufacturer and solution providerTorich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the ... Who We are ? -------A professional steel pipes materials inventor, manufacturer and solution providerTorich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the ...
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