API Spec 5CT
API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells.
Besides casing and tubing, it also includes pup joints, coupling stock, coupling material, and accessory materials, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3). The requirements for PSL-1 are the basis of this standard.
Outer Diameter: 4 1/2″-20″, (114.3-508mm)
Specification: API 5CT/ISO 11960
Wall Thickness: 1.0mm-30 mm
Casing Pipe Specifications:
|
Size |
Weight Lb/ft |
Outside Diameter |
Wall Thickness |
Type End Finish |
|||||||||
|
Steel Grade |
|||||||||||||
|
ln. |
mm |
ln. |
mm |
H-40 |
J55/ K55 |
M65 |
L-80C-95 |
N80 |
C-90T-95 |
P110 |
Q125 |
||
|
7 5/8” |
24.00 |
7.625 |
193.68 |
0.300 |
7.62 |
PS |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
26.40 |
7.625 |
193.68 |
0.328 |
8.33 |
-- |
PSLB |
PSLB |
PLB |
PLB |
PLB |
PLB |
-- |
|
|
29.70 |
7.625 |
193.68 |
0.375 |
9.53 |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
-- |
|
|
33.70 |
7.625 |
193.68 |
0.430 |
10.92 |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
-- |
|
|
39.00 |
7.625 |
193.68 |
0.500 |
12.70 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
42.80 |
7.625 |
193.68 |
0.562 |
14.27 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
45.30 |
7.625 |
193.68 |
0.595 |
15.11 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
47.10 |
7.625 |
193.68 |
0.625 |
15.88 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
51.20 |
7.625 |
193.68 |
0.687 |
17.45 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
55.30 |
7.75 |
193.68 |
196.85 |
19.05 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
7 3/4” |
46.10 |
8.625 |
219.08 |
0.595 |
15.11 |
-- |
-- |
-- |
P |
P |
P |
P |
P |
|
8 5/8” |
24.00 |
8.625 |
219.08 |
0.264 |
6.71 |
-- |
PS |
PS |
-- |
-- |
-- |
-- |
-- |
|
28.00 |
8.625 |
219.08 |
0.304 |
7.72 |
PS |
-- |
PS |
-- |
-- |
-- |
-- |
-- |
|
|
32.00 |
8.625 |
219.08 |
0.352 |
8.94 |
PS |
PSLB |
PSLB |
-- |
-- |
-- |
-- |
-- |
|
|
36.00 |
8.625 |
219.08 |
0.400 |
10.16 |
-- |
PSLB |
PSLB |
PLB |
PLB |
PLB |
PSLB |
-- |
|
|
40.00 |
8.625 |
219.08 |
0.450 |
11.43 |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
-- |
|
|
44.00 |
8.625 |
219.08 |
0.500 |
12.70 |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
-- |
|
|
49.00 |
9.625 |
244.48 |
0.557 |
14.15 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
9 5/8” |
32.30 |
9.625 |
244.48 |
0.312 |
7.92 |
PS |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
36.00 |
9.625 |
244.48 |
0.352 |
8.94 |
PS |
PSLB |
PSLB |
-- |
-- |
-- |
-- |
-- |
|
|
40.00 |
9.625 |
244.48 |
0.395 |
10.03 |
-- |
PSLB |
PSLB |
PLB |
PLB |
PLB |
-- |
-- |
|
|
43.50 |
9.625 |
244.48 |
0.435 |
11.05 |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
-- |
|
|
47.00 |
9.625 |
244.48 |
0.472 |
11.99 |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
53.50 |
9.625 |
244.48 |
0.545 |
13.84 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
58.40 |
9.625 |
244.48 |
0.595 |
15.11 |
-- |
-- |
-- |
PLB |
PLB |
PLB |
PLB |
PLB |
|
|
59.40 |
9.625 |
244.48 |
0.609 |
15.47 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
64.90 |
9.625 |
244.48 |
0.672 |
17.07 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
70.30 |
9.625 |
244.48 |
0.734 |
18.64 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
75.60 |
9.625 |
244.48 |
0.797 |
20.24 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
P-plain end; S-short round thread; L-long round thread; B-buttress thread. |
|||||||||||||
|
Size |
Weight |
Outside Diameter |
Wall Thickness |
Type End Finish |
|||||||||
|
Steel Grade |
|||||||||||||
|
ln. |
mm |
ln. |
mm |
H-40 |
J-55 |
M-65 |
L-80 |
N-80 |
C-90T-95 |
P-110 |
Q-125 |
||
|
10 3/4” |
32.75 |
10.75 |
273.05 |
0.279 |
7.09 |
PS |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
40.50 |
10.75 |
273.05 |
0.350 |
8.89 |
PS |
PSB |
PSB |
-- |
-- |
-- |
-- |
-- |
|
|
45.50 |
10.75 |
273.05 |
0.400 |
10.16 |
-- |
PSB |
PSB |
-- |
-- |
-- |
-- |
-- |
|
|
51.00 |
10.75 |
273.05 |
0.450 |
11.43 |
-- |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
-- |
|
|
55.50 |
10.75 |
273.05 |
0.495 |
12.57 |
-- |
-- |
PSB |
PSB |
PSB |
PSB |
PSB |
-- |
|
|
60.70 |
10.75 |
273.05 |
0.545 |
13.84 |
-- |
-- |
-- |
-- |
-- |
PSB |
PSB |
PSB |
|
|
65.70 |
10.75 |
273.05 |
0.595 |
15.11 |
-- |
-- |
-- |
-- |
-- |
PSB |
PSB |
PSB |
|
|
73.20 |
10.75 |
273.05 |
0.672 |
17.07 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
79.20 |
10.75 |
273.05 |
0.734 |
18.64 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
85.30 |
10.75 |
273.05 |
0.797 |
20.24 |
-- |
-- |
-- |
-- |
-- |
P |
-- |
-- |
|
|
11 3/4” |
42.00 |
11.75 |
298.45 |
0.333 |
8.46 |
PS |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
47.00 |
11.75 |
298.45 |
0.375 |
9.53 |
-- |
PSB |
PSB |
-- |
-- |
-- |
-- |
-- |
|
|
54.00 |
11.75 |
298.45 |
0.435 |
11.05 |
-- |
PSB |
PSB |
-- |
-- |
-- |
-- |
-- |
|
|
60.00 |
11.75 |
298.45 |
0.489 |
12.42 |
-- |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
|
|
65.00 |
11.75 |
298.45 |
0.534 |
13.56 |
-- |
-- |
-- |
P |
P |
P |
P |
P |
|
|
71.00 |
11.75 |
298.45 |
0.582 |
14.78 |
-- |
-- |
-- |
P |
P |
P |
P |
P |
|
|
13 3/8” |
48.00 |
13.375 |
339.73 |
0.330 |
8.38 |
PS |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
54.50 |
13.375 |
339.73 |
0.380 |
9.65 |
-- |
PSB |
PSB |
-- |
-- |
-- |
-- |
-- |
|
|
61.00 |
13.375 |
339.73 |
0.430 |
10.92 |
-- |
PSB |
PSB |
-- |
-- |
-- |
-- |
-- |
|
|
68.00 |
13.375 |
339.73 |
0.480 |
12.19 |
-- |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
-- |
|
|
72.00 |
13.375 |
339.73 |
0.514 |
13.06 |
-- |
-- |
-- |
PSB |
PSB |
PSB |
PSB |
PSB |
|
|
P-plain end; S-short round thread; L-long round thread; B-buttress thread. |
|||||||||||||
Oil Tubing Specifications:
|
Size |
Weight Lb/ft |
Outside Diameter |
Wall Thickness |
Nominal Weight |
Type End Finish |
|||||||
|
Steel Grade |
||||||||||||
|
Nonupset |
Ex-upset |
mm |
mm |
Nonupset |
Ex-upset |
J55/K55 |
L80 |
N80 |
C90 |
T95 |
P110 |
|
|
T & C |
T & C |
T & C |
T & C |
|||||||||
|
23/8” |
4 |
-- |
60.32 |
4.24 |
5.95 |
-- |
PN |
PN |
PN |
PN |
PN |
-- |
|
4.6 |
4.7 |
60.32 |
4.83 |
6.85 |
6.99 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
|
|
5.8 |
5.95 |
60.32 |
6.45 |
8.63 |
8.85 |
-- |
PNU |
PNU |
PNU |
PNU |
PNU |
|
|
6.6 |
-- |
60.32 |
7.49 |
9.82 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
7.35 |
7.45 |
60.32 |
8.53 |
10.94 |
11.09 |
-- |
PU |
-- |
PU |
PU |
-- |
|
|
27/8” |
6.4 |
6.5 |
73.02 |
5.51 |
9.52 |
9.67 |
PUN |
PNU |
PNU |
PNU |
PNU |
PNU |
|
7.8 |
7.9 |
73.02 |
7.01 |
11.61 |
11.76 |
-- |
PNU |
PNU |
PNU |
PNU |
PNU |
|
|
8.6 |
8.7 |
73.02 |
7.82 |
12.8 |
12.95 |
-- |
PNU |
PNU |
PNU |
PNU |
PNU |
|
|
9.35 |
9.45 |
73.02 |
8.64 |
13.91 |
14.06 |
-- |
PU |
-- |
PU |
PU |
-- |
|
|
10.5 |
-- |
73.02 |
9.96 |
15.63 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
11.5 |
-- |
73.02 |
11.18 |
17.11 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
31/2” |
7.7 |
-- |
88.9 |
5.49 |
11.46 |
-- |
PN |
PN |
PN |
PN |
PN |
-- |
|
9.2 |
9.3 |
88.9 |
6.45 |
13.69 |
13.84 |
PNU |
PNU |
PNU |
PNU |
PNU |
PNU |
|
|
10.2 |
-- |
88.9 |
7.34 |
15.18 |
-- |
PN |
PN |
PN |
PN |
PN |
-- |
|
|
12.7 |
12.95 |
88.9 |
9.52 |
18.9 |
19.27 |
-- |
PNU |
PNU |
PNU |
PNU |
PNU |
|
|
14.3 |
-- |
88.9 |
10.92 |
21.28 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
15.5 |
-- |
88.9 |
12.09 |
23.07 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
17 |
-- |
88.9 |
13.46 |
25.3 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
4” |
9.5 |
-- |
101.6 |
5.74 |
14.14 |
-- |
PN |
PN |
PN |
PN |
PN |
PN |
|
10.7 |
11 |
101.6 |
6.65 |
-- |
16.37 |
PU |
PU |
PU |
PU |
PU |
PU |
|
|
13.2 |
-- |
101.6 |
8.38 |
19.64 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
16.1 |
-- |
101.6 |
10.54 |
23.96 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
18.9 |
-- |
101.6 |
12.7 |
28.13 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
22.2 |
-- |
101.6 |
15.49 |
33.04 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
41/2” |
12.6 |
12.75 |
114.3 |
6.88 |
18.75 |
18.97 |
PUN |
PNU |
PNU |
PNU |
PNU |
PNU |
|
15.2 |
-- |
114.3 |
8.56 |
22.62 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
17 |
-- |
114.3 |
9.65 |
25.3 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
18.9 |
-- |
114.3 |
10.92 |
28.13 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
21.5 |
-- |
114.3 |
12.7 |
32 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
23.7 |
-- |
114.3 |
14.22 |
35.27 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
26.1 |
-- |
114.3 |
16 |
38.84 |
-- |
-- |
P |
-- |
P |
P |
-- |
|
|
Note: P-plain end; N-nonupset thread and coupling; U-upset thread and coupling. |
||||||||||||
Chemical Composition
|
Grade |
C≤ |
Si≤ |
Mn≤ |
P≤ |
S≤ |
Cr≤ |
Ni≤ |
Cu≤ |
Mo≤ |
V≤ |
Als≤ |
|
API 5CT J55 |
0.34-0.39 |
0.20-0.35 |
1.25-1.50 |
0.020 |
0.015 |
0.15 |
0.20 |
0.20 |
/ |
/ |
0.020 |
|
API 5CT K55 |
0.34-0.39 |
0.20-0.35 |
1.25-1.50 |
0.020 |
0.015 |
0.15 |
0.20 |
0.20 |
/ |
/ |
0.020 |
|
API 5CT N80 |
0.34-0.38 |
0.20-0.35 |
1.45-1.70 |
0.020 |
0.015 |
0.15 |
/ |
/ |
/ |
0.11-0.16 |
0.020 |
|
API 5CT L80 |
0.15-0.22 |
1.00 |
0.25-1.00 |
0.020 |
0.010 |
12.0-14.0 |
0.20 |
0.20 |
/ |
/ |
0.020 |
|
API 5CT J P110 |
0.26-035 |
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 |
0.02 |
Mechanical Properties
|
Steel Grade |
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
|
API 5CT J55 |
379-552 |
≥517 |
|
API 5CT K55 |
≥655 |
≥517 |
|
API 5CT N80 |
552-758 |
≥689 |
|
API 5CT L80 |
552-655 |
≥655 |
|
API 5CT P110 |
758-965 |
≥862 |
