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GB/T9808 STM-R780 High Straightness Seamless Cold Drawn Steel Tube For Drilling

Basic Information
Place of Origin: China
Brand Name: TORICH
Certification: ISO14001:2008, TS16949, CE PED, TUV, API,BV
Model Number: GB/T9808
Minimum Order Quantity: 2 tons
Price: negotiable
Packaging Details: in wooden boxes or in hexagonal bundles
Delivery Time: 30-45 Days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram,
Supply Ability: 20000 Tons per Year
Detail Information
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
High Light:

precision stainless steel tubing

,

seamless carbon steel tube


Product Description

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:

GB/T9808 STM-R780 High Straightness Seamless Steel Tubes for Drilling.jpgGB/T9808 STM-R780 High Straightness Seamless Steel Tubes for Drilling.jpg

Contact Details
Christine Guan

Phone Number : +8618968237897

WhatsApp : +8613736164628