Introduction
A casing pipe is a hollow steel tube that is typically rammed into place
through the earth by using a hydraulic or pneumatic jack. After being driven,
the displaced soil is removed and the product pipe, or carrier pipe, is inserted
inside the steel tube.
Available Sizes
Category:ERW, HFW or SMLS
Standards:API 5CT PSL1/PSL2 J55,K55,N80-1,N80-Q,API 5CT PSL1/PSL2 L80-1,
L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Steel Grade:H40, J55, K55, N80
Connections
API 5CT is applicable to following connections which complied with API SPEC
5B:
• SC:Short round thread casing
• LC:Long ound thread casing
• BC:Buttress thread casing
• NU: Non-upset tubing
• EU:External upset tubing
Specification
DN
|
O. D.
|
Weight
|
W. T.
|
End Machining Form
|
Steel Grade
|
in
|
mm
|
lb/ft
|
kg/m
|
in
|
mm
|
H40
|
J55
|
L80
|
N80
|
C90
|
P110
|
K55
|
T95
|
4-1/2
|
4.500
|
114.3
|
9.50
|
14.14
|
0.205
|
5.21
|
PS
|
PS
|
–
|
–
|
–
|
–
|
10.50
|
15.63
|
0.224
|
5.69
|
–
|
PSB
|
–
|
–
|
–
|
–
|
11.60
|
17.26
|
0.250
|
6.35
|
–
|
PSLB
|
PLB
|
PLB
|
PLB
|
PLB
|
13.50
|
20.09
|
0.290
|
7.37
|
–
|
–
|
PLB
|
PLB
|
PLB
|
PLB
|
15.10
|
22.47
|
0.337
|
9.56
|
–
|
–
|
–
|
–
|
–
|
PLB
|
5
|
5.000
|
127
|
11.50
|
17.11
|
0.220
|
5.59
|
–
|
PS
|
–
|
–
|
–
|
–
|
13.00
|
19.35
|
0.253
|
6.43
|
–
|
PSLB
|
–
|
–
|
–
|
–
|
15.00
|
22.32
|
0.296
|
7.52
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
PLB
|
18.00
|
26.79
|
0.362
|
9.19
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
21.40
|
31.85
|
0.437
|
11.10
|
–
|
–
|
PLB
|
PLB
|
PLB
|
PLB
|
23.20
|
34.53
|
0.478
|
12.14
|
–
|
–
|
–
|
–
|
PLB
|
–
|
24.10
|
35.86
|
0.500
|
12.70
|
–
|
–
|
–
|
–
|
PLB
|
–
|
5-1/2
|
5.500
|
139.7
|
14.00
|
20.83
|
0.244
|
6.20
|
PS
|
PS
|
–
|
–
|
–
|
–
|
15.50
|
23.07
|
0.275
|
6.98
|
–
|
PSLB
|
–
|
–
|
–
|
–
|
17.00
|
25.30
|
0.304
|
7.72
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
PLB
|
20.00
|
29.76
|
0.361
|
9.17
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
23.00
|
34.23
|
0.415
|
10.54
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
26.80
|
39.88
|
0.500
|
12.70
|
–
|
–
|
–
|
–
|
–
|
–
|
29.70
|
44.20
|
0.562
|
14.27
|
–
|
–
|
–
|
–
|
–
|
–
|
32.60
|
48.51
|
0.625
|
15.88
|
–
|
–
|
–
|
–
|
–
|
–
|
35.30
|
52.53
|
0.687
|
17.45
|
–
|
–
|
–
|
–
|
–
|
–
|
38.00
|
56.55
|
0.750
|
19.05
|
–
|
–
|
–
|
–
|
–
|
–
|
40.50
|
60.27
|
0.812
|
20.62
|
–
|
–
|
–
|
–
|
–
|
–
|
43.10
|
64.14
|
0.875
|
22.22
|
–
|
–
|
–
|
–
|
–
|
–
|
6-5/8
|
6.625
|
168.28
|
20.00
|
29.76
|
0.288
|
7.32
|
PS
|
PSLB
|
–
|
–
|
–
|
–
|
24.00
|
35.72
|
0.352
|
8.94
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
PLB
|
28.00
|
41.67
|
0.417
|
10.59
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
32.00
|
47.62
|
0.475
|
12.06
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
7
|
7.000
|
177.8
|
17.00
|
25.30
|
0.231
|
5.87
|
PS
|
–
|
–
|
–
|
–
|
–
|
20.00
|
29.76
|
0.272
|
6.91
|
PS
|
PS
|
–
|
–
|
–
|
–
|
23.00
|
34.23
|
0.317
|
8.05
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
–
|
26.00
|
38.69
|
0.362
|
9.19
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
PLB
|
29.00
|
43.16
|
0.408
|
10.36
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
32.00
|
47.62
|
0.453
|
11.51
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
35.00
|
52.09
|
0.498
|
12.65
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
38.00
|
56.55
|
0.540
|
13.72
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
42.70
|
63.54
|
0.625
|
15.88
|
–
|
–
|
–
|
–
|
–
|
–
|
46.40
|
69.05
|
0.687
|
17.45
|
–
|
–
|
–
|
–
|
–
|
–
|
50.10
|
74.56
|
0.750
|
19.05
|
–
|
–
|
–
|
–
|
–
|
–
|
53.60
|
79.77
|
0.812
|
20.62
|
–
|
–
|
–
|
–
|
–
|
–
|
57.10
|
84.97
|
0.875
|
22.22
|
–
|
–
|
–
|
–
|
–
|
–
|
7-5/8
|
7.625
|
193.68
|
24.00
|
35.72
|
0.300
|
7.62
|
PS
|
–
|
–
|
–
|
–
|
–
|
26.40
|
39.29
|
0.328
|
8.33
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
PLB
|
29.70
|
44.20
|
0.375
|
9.52
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
33.70
|
50.15
|
0.430
|
10.92
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
39.00
|
58.05
|
0.500
|
12.70
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
42.80
|
63.69
|
0.562
|
14.27
|
–
|
–
|
PLB
|
PLB
|
PLB
|
PLB
|
45.30
|
67.41
|
0.595
|
15.11
|
–
|
–
|
PLB
|
PLB
|
PLB
|
PLB
|
47.10
|
70.09
|
0.625
|
15.88
|
–
|
–
|
PLB
|
PLB
|
PLB
|
PLB
|
51.20
|
76.19
|
0.687
|
17.45
|
–
|
–
|
–
|
–
|
–
|
–
|
55.30
|
80.30
|
0.750
|
19.05
|
–
|
–
|
–
|
–
|
–
|
–
|
8-5/8
|
8.625
|
219.08
|
24.00
|
35.72
|
0.264
|
6.71
|
–
|
PS
|
–
|
–
|
–
|
–
|
28.00
|
41.62
|
0.304
|
7.72
|
PS
|
–
|
–
|
–
|
–
|
–
|
32.00
|
47.62
|
0.352
|
8.94
|
PS
|
PSLB
|
–
|
–
|
–
|
–
|
36.00
|
53.57
|
0.400
|
10.16
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
PLB
|
40.00
|
59.53
|
0.450
|
11.43
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
44.00
|
65.48
|
0.500
|
12.70
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
49.00
|
72.92
|
0.557
|
14.15
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
9-5/8
|
9.625
|
244.48
|
32.30
|
48.07
|
0.312
|
7.92
|
PS
|
–
|
–
|
–
|
–
|
–
|
36.00
|
53.57
|
0.352
|
8.94
|
PS
|
PSLB
|
–
|
–
|
–
|
–
|
40.00
|
59.53
|
0.395
|
10.03
|
–
|
PSLB
|
PLB
|
PLB
|
PLBE
|
–
|
43.50
|
64.73
|
0.435
|
11.05
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
47.00
|
69.94
|
0.472
|
11.99
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
53.50
|
79.62
|
0.545
|
13.84
|
–
|
–
|
PLB
|
PLB
|
PLBE
|
PLB
|
58.40
|
86.91
|
0.595
|
15.11
|
–
|
–
|
PLB
|
PLB
|
PLB
|
PLB
|
59.40
|
88.40
|
0.609
|
15.47
|
–
|
–
|
–
|
–
|
–
|
–
|
64.90
|
96.58
|
0.672
|
17.07
|
–
|
–
|
–
|
–
|
–
|
–
|
70.30
|
104.62
|
0.734
|
18.64
|
–
|
–
|
–
|
–
|
–
|
–
|
75.60
|
112.50
|
0.797
|
20.24
|
–
|
–
|
–
|
–
|
–
|
–
|
10-3/4
|
10.750
|
273.05
|
32.75
|
48.74
|
0.279
|
7.09
|
PS
|
–
|
–
|
–
|
–
|
–
|
40.50
|
60.27
|
0.350
|
8.89
|
PS
|
PSB
|
–
|
–
|
–
|
–
|
15.50
|
67.71
|
0.400
|
10.16
|
–
|
PSB
|
–
|
–
|
–
|
–
|
51.00
|
75.90
|
0.450
|
11.43
|
–
|
PSB
|
PSB
|
PSB
|
PSBE
|
PSB
|
55.50
|
82.59
|
0.495
|
12.57
|
–
|
–
|
PSB
|
PSB
|
PSBE
|
PSB
|
60.70
|
90.33
|
0.545
|
13.84
|
–
|
–
|
–
|
–
|
PSBE
|
PSB
|
65.70
|
97.77
|
0.595
|
15.11
|
–
|
–
|
–
|
–
|
PSB
|
PSB
|
73.20
|
108.93
|
0.672
|
17.07
|
–
|
–
|
–
|
–
|
–
|
–
|
79.20
|
117.86
|
0.734
|
18.64
|
–
|
–
|
–
|
–
|
–
|
–
|
85.30
|
126.94
|
0.797
|
20.24
|
–
|
–
|
–
|
–
|
–
|
–
|
11-3/4
|
11.750
|
|
42.00
|
62.50
|
0.333
|
8.46
|
PS
|
–
|
–
|
–
|
–
|
–
|
47.00
|
69.94
|
0.375
|
20.24
|
–
|
–
|
–
|
–
|
–
|
–
|
54.00
|
80.36
|
0.435
|
8.46
|
–
|
–
|
–
|
–
|
–
|
–
|
60.00
|
89.29
|
0.489
|
9.53
|
–
|
–
|
–
|
–
|
–
|
–
|
65.00
|
96.73
|
0.534
|
11.05
|
–
|
–
|
–
|
–
|
–
|
–
|
71.00
|
105.66
|
0.582
|
14.42
|
–
|
–
|
–
|
–
|
–
|
–
|
13-3/8
|
13.375
|
339.73
|
48.00
|
71.43
|
0.330
|
8.38
|
PS
|
–
|
–
|
–
|
–
|
–
|
54.50
|
81.10
|
0.380
|
9.65
|
–
|
PSB
|
–
|
–
|
–
|
–
|
61.00
|
90.78
|
0.430
|
10.92
|
–
|
PSB
|
–
|
–
|
–
|
–
|
68.00
|
101.19
|
0.480
|
12.19
|
–
|
PSB
|
PSB
|
PSB
|
PSB
|
PSB
|
72.00
|
107.15
|
0.514
|
13.06
|
–
|
–
|
PSB
|
PSB
|
PSB
|
PSB
|
16
|
16.000
|
406.4
|
65.00
|
96.73
|
0.375
|
9.53
|
PS
|
–
|
–
|
–
|
–
|
–
|
75.00
|
111.61
|
0.438
|
11.13
|
–
|
PSB
|
–
|
–
|
–
|
–
|
84.00
|
125.01
|
0.495
|
12.57
|
–
|
PSB
|
–
|
–
|
–
|
–
|
109.00
|
162.21
|
0.656
|
16.66
|
–
|
P
|
P
|
P
|
–
|
P
|
18-5/8
|
18.625
|
473.08
|
87.50
|
130.21
|
0.435
|
11.05
|
PS
|
PSB
|
–
|
–
|
–
|
–
|
20
|
20.000
|
508
|
94.00
|
139.89
|
0.438
|
11.13
|
PSL
|
PSLB
|
–
|
–
|
–
|
–
|
106.50
|
158.49
|
0.500
|
12.70
|
–
|
PSLB
|
–
|
–
|
–
|
–
|
133.00
|
197.93
|
0.635
|
16.13
|
–
|
PSLB
|
–
|
–
|
–
|
–
|
P——Plain;S——Short-thread;L——Long-thread;B——Buttress thread;E——Extreme thread
|
Chemical compositions of casing pipe
Standard
|
Grade
|
Chemical compositions(%)
|
API SPEC 5CT
|
J55
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
Cu
|
Mo
|
V
|
K55
|
0.34~0.39
|
0.20~0.35
|
1.25~1.50
|
≤0.020
|
≤0.015
|
≤0.15
|
≤0.20
|
≤0.20
|
/
|
/
|
N80
|
0.34~0.38
|
0.20~0.35
|
1.45~1.70
|
≤0.020
|
≤0.015
|
≤0.15
|
/
|
/
|
/
|
0.11~0.16
|
L80
|
0.15~0.22
|
≤1.00
|
0.25~1.00
|
≤0.020
|
≤0.010
|
12.0~14.0
|
≤0.20
|
≤0.20
|
/
|
/
|
P110
|
0.26~0.395
|
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
|
Mechanical properties of casing pipe
Grade
|
Type
|
Total elongation under load (%)
|
Yield strength (min)
|
Yield strength (max)
|
Tensile strength min Mpa
|
Hardness Max (HRC)
|
Hardness Max(HBW)
|
J55
|
-
|
0.5
|
379
|
552
|
517
|
-
|
-
|
K55
|
-
|
0.5
|
379
|
552
|
655
|
-
|
-
|
N80
|
1
|
0.5
|
552
|
758
|
689
|
-
|
-
|
N80
|
Q
|
0.5
|
552
|
758
|
689
|
-
|
-
|
L80
|
1
|
0.5
|
552
|
655
|
655
|
23
|
241
|
L80
|
9Cr
|
0.5
|
552
|
655
|
655
|
23
|
241
|
L80
|
13Cr
|
0.5
|
552
|
655
|
655
|
23
|
241
|
C90
|
-
|
0.5
|
621
|
724
|
689
|
25.4
|
255
|
C95
|
-
|
0.5
|
655
|
758
|
724
|
-
|
-
|
T95
|
-
|
0.5
|
655
|
758
|
724
|
25.4
|
255
|
P110
|
-
|
0.6
|
758
|
965
|
862
|
-
|
-
|
Q125
|
All
|
0.65
|
862
|
1034
|
931
|
-
|
-
|
Our factory
Packing
There are probably hundreds of different methods for packing a pipe, and most
of them have merit, but there are two principles that are vital for any method
to work prevent rusting and Sea transportation security.Our packing can meet any
needs of the customers.
· Plastic caps plugged at the two sides of pipe ends
· Should be avoided by the steel strapping and transport damage
· Bundled signs should be uniform and consistent
· The same bundle(batch) of steel pipe should be came from the same
furnace.
· The steel pipe has the same furnace number, the same steel grade, the same
specifications.