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Home Products CASING Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing
Oil casing

Oil casing

The full range of API oil and casing pipes primarily consists of steel pipes manufactured in accordance with the API SPEC 5CT standard of the American Petroleum Institute, and are mainly used for the extraction of petroleum, natural gas, and other energy resources. Oil pipes are used in oil wells to extract petroleum or natural gas, while casing pipes serve as the wellbore wall for oil and gas wells.
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Product Details

Primary steel grade of the product


Group

Steel grade

Type

Total elongation under load

%

Yield Strength

MPa

Tensile Strength

min

MPa

Hardness a

max

Specified wall thickness

mm

Allow hardness variation b

HRC

min

max

HRC

HBW

1

2

3

4

5

6

7

8

9

10

11

1

H40
J55
K55
N80
N80

-
-
-
1
Q

0.5
0.5
0.5
0.5
0.5

276
379
379
552
552

552
552
552
758
758

414
517
655
689
689

-
-
-
-
-

-
-
-
-
-

-
-
-
-
-

-
-
-
-
-

2

M65
L80
L80
L80
C90
C90
C90
C90
C95
T95
T95
T95
T95

-
1
9Cr
13Cr
1、2
1、2
1、2
1、2
-
1、2
1、2
1、2
1、2

0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5

448
552
552
552
621
621
621
621
655
655
655
655
655

586
655
655
655
724
724
724
724
758
758
758
758
758

586
655
655
655
689
689
689
689
724
724
724
724
724

22
23
23
23
25.4
25.4
25.4
25.4
-
25.4
25.4
25.4
25.4

235
241
241
241
255
255
255
255
-
255
255
255
255

-

-

-

-

≤12.70

12.71～19.04

19.05～25.39

≥25.40

-

≤12.70

12.71～19.04

19.05～25.39

≥25.40

-
-
-
-
3.0
4.0
5.0
6.0
-
3.0
4.0
5.0
6.0

3

P110

-

0.6

758

965

862

-

-

-

-

4

Q125
Q125
Q125

All

All

All

0.65
0.65
0.65

862
862
862

1034
1034
1034

931

931

931

b
b
b

-
-
-

≤12.70

12.71～19.04

≥19.05

3.0
4.0
5.0




Comply with the following standards:

API SPEC 5CT, ISO 11960-2004, and GB/T 19830-2011.

 

Product features:

excellent geometric dimensional accuracy and stable physicochemical properties; the casing exhibits outstanding crush resistance, typically exceeding API specification values by over 15%; the tubing is rolled using imported CPE tube-pressing equipment from Mannesmann-DeMack mil GmbH (Germany), with an inner surface quality that leads the domestic market.

 

Product specifications: outer diameter:

Φ26.67 mm – Φ508 mm; wall thickness: 3.18 mm – 22.2 mm.

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