API SPEC 5CT Steel Casing and Tubing

We can supply various standards.

Steel Tube Grade:

API Spec 5CT J55/ K55, N80-1, N80Q, L80,C90, T95, P110

Type: Seamless / Welded

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Description

API oil casing is a device used to transport fluid pipelines.
API Specification for Casing and Tubing, American Petroleum Institute Standard, Specification for Casing and Tubing, API Spec 5CT.
API oil casing is mainly used for the drilling of oil and gas wells and the transportation of oil and gas. It includes oil drilling pipe, oil casing, oil extraction pipe. Oil drill pipe is mainly used to connect drill collars and drill bits and transmit drilling power. The oil casing is mainly used to support the well wall during the drilling process and after the well completion, so as to ensure the drilling process and the normal operation of the entire oil well after the well completion.
Executive standards: API SPEC 5CT, ISO 11960-2004, GB/T 19830-2011.
Product specification range: outer diameter: Φ26.67mm~Φ219.08mm; wall thickness: 3.18mm~22.2mm.

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Standard codes Models of steel tubes Chemical compositions（％）
C Si Mn P S Cr Ni Cu Mo V Als
API SPEC 5CT J55 K55 (37Mn5) 0.34～0.39 0.20～0.35 1.25～1.50 ≤0.020 ≤0.015 ≤0.15 ≤0.20 ≤0.20 ≤0.020
N80 (36 Mn2V) 0.34～0.38 0.20～0.35 1.45～1.70 ≤0.020 ≤0.015 ≤0.15 0.11～0.16 ≤0.020
L80(13Cr) 0.15～0.22 ≤1.00 0.25～1.00 ≤0.020 ≤0.010 12.0～14.0 ≤0.20 ≤0.20 ≤0.020
P110 (30CrMo) 0.26～0.35 0.17～0.37 0.40～0.70 ≤0.020 ≤0.010 0.80～1.10 ≤0.20 ≤0.20 0.15～0.25 ≤0.08 ≤0.020

PRODUCT DESCRIPTION

Item Grade Type Total elongation under load
%		 Yield Strength
MPa		 Tensile Strength
min
MPa		 Hardness a
max		 Specified Wall Thickness

mm

 Variation in hardness allowed 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

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PRODUCT DISPLAY

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FAQ

Q:Can I get samples before order ?

A:Yes, of course. Usually our samples are free,we can produce by your samples or technical drawings.

Q:Can I go to your factory to visit?

A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?

A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.

Q:Does the product have quality inspection before loading?

A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept third party inspection.

Q:How do we trust your company?

A:We specialise in steel business for years, headquarter locates in Liaocheng, Shandong province, you are welcome to investigate in any ways, by all means, we have CE and ISO9001 certificate, quality can be guaranteed.