Premium API Petroleum Casing
The API Petroleum Casing adheres to the API 5L standards by the American Petroleum Institute. These standards are the cornerstone for most petroleum casing exports, thus earning the name API Petroleum Casing. The primary materials used include K55, J55, N80, and P110 casings. The common thread types are short round (STC), long round (LTC), and partial trapezoidal (BTC), alongside airtight and threaded special buckles. North China is a major production hub, and these casings are available in both seamless and welded forms, with seamless pipes generally being more expensive. API Petroleum Casings excel in mechanical properties compared to ordinary carbon steel pipes and are extensively used in oil drilling. Our clientele spans Southeast Asia, East Asia, the Middle East, West Asia, Latin America, and beyond.
1. Specification Range: Outer diameter from 42.16mm to 510.0mm
3.56MM-16MM
2. Material: H40, J55, K55, N80-1, N80-Q, L80-1, L80-9Cr, L80-13Cr,
P110, Q125, and more.
3. Standard: API 5CT, GB, ISO11960, GOST
4. Threaded Connection: NU, EU, IJ
5. Length: Available in R1, R2, R3
6. Testing: Non-destructive testing in compliance with API 5CT and 5B, along with other relevant regulations
7. Type: Seamless Pipe
Detailed Photos:
Mechanical Properties:Mechanical Properties:
standard |
model number |
tensile strength (MPa) |
yield strength (MPa) |
durometer |
API SPEC 5CT |
J55 |
≥517 |
379~552 |
|
K55 |
≥517 |
≥655 |
|
N80 |
≥689 |
552~758 |
|
L80(13Cr) |
≥655 |
552~655 |
≤241HB |
P110 |
≥862 |
758~965 |
|
Chemical Composition:
standard |
model number |
chemical composition (%) |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
Als |
API SPEC 5CT |
J55K55 (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 |
Length Range:
lengths |
project |
range 1 |
range 2 |
range 3 |
oil pipe |
6.10-7.32m |
8.53-9.75m |
- |
casing |
4.88-7.62m |
7.62-10.36m |
10.36-14.63m |
Product Description:Oil Pipe
Standards: API SPEC 5CT, API SPEC 5B, ISO 11960
Uses: Tubing is utilized for extracting oil or gas from wells.
Oil Pipe Specifications:
Size code |
Weight Code |
outer diameter |
Thickness |
End machining form |
Steel grade |
unthickened |
thickened |
in |
mm |
in |
mm |
J55 |
L80-1 |
N80 |
C90 |
T95 |
P110 |
1.900" |
2.40 |
- |
1.900 |
48.26 |
0.125 |
3.18 |
PI |
- |
- |
- |
- |
- |
2.75 |
2.90 |
1.900 |
48.26 |
0.145 |
3.68 |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
- |
3.65 |
- |
1.900 |
48.26 |
0.200 |
5.08 |
PU |
PU |
PU |
PU |
PU |
PU |
2 3/8" |
4.00 |
- |
2.375 |
60.32 |
0.167 |
4.24 |
PN |
PN |
PN |
PN |
PN |
- |
4.00 |
4.70 |
2.375 |
60.32 |
0.190 |
4.83 |
PNU |
PNU |
PNU |
PNU |
PNU |
- |
5.80 |
5.95 |
2.375 |
60.32 |
0.254 |
6.45 |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
6.60 |
- |
2.375 |
60.32 |
0.259 |
7.49 |
- |
P |
- |
P |
P |
PNU |
7.35 |
7.45 |
2.375 |
60.32 |
0.336 |
8.53 |
- |
PU |
- |
PU |
PU |
- |
2 7/8" |
6.40 |
6.50 |
2.875 |
73.02 |
0.217 |
5.51 |
PNU |
PNU |
PNU |
PNU |
PNU |
- |
7.80 |
7.90 |
2.875 |
73.02 |
0.276 |
7.01 |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
8.60 |
8.70 |
2.875 |
73.02 |
0.308 |
7.82 |
- |
PNU |
PNU |
PNU |
PNU |
PNU |
9.35 |
9.45 |
2.875 |
73.02 |
0.340 |
8.64 |
- |
PU |
- |
PU |
PU |
PNU |
10.50 |
- |
2.875 |
73.02 |
0.392 |
9.96 |
- |
P |
- |
P |
P |
- |
11.50 |
- |
2.875 |
73.02 |
0.440 |
11.18 |
- |
P |
- |
P |
P |
- |
3 1/2" |
7.70 |
- |
3.500 |
88.90 |
0.216 |
5.49 |
PN |
PN |
PN |
PN |
PN |
- |
9.20 |
9.30 |
3.500 |
88.90 |
0.254 |
6.54 |
PNU |
PNU |
PNU |
PNU |
PNU |
- |
10.20 |
- |
3.500 |
88.90 |
0.289 |
7.34 |
PN |
PN |
PN |
PN |
PN |
PNU |
12.70 |
12.95 |
3.500 |
88.90 |
0.375 |
9.52 |
- |
PNU |
PNU |
PNU |
PNU |
- |
14.30 |
- |
3.500 |
88.90 |
0.430 |
10.92 |
- |
P |
- |
P |
P |
PNU |
15.50 |
- |
3.500 |
88.90 |
0.476 |
12.00 |
- |
P |
- |
P |
P |
- |
17.00 |
- |
3.500 |
88.90 |
0.530 |
13.46 |
- |
P |
- |
P |
P |
- |
4" |
9.50 |
- |
4.000 |
101.60 |
0.226 |
5.74 |
PN |
PN |
PN |
PN |
PN |
- |
10.70 |
11.00 |
4.000 |
101.60 |
0.262 |
6.65 |
PU |
PU |
PU |
PU |
PU |
- |
4 1/2" |
12.60 |
12.75 |
4.500 |
114.30 |
0.271 |
6.88 |
PNU |
PNU |
PNU |
PNU |
PNU |
- |
15.20 |
- |
4.500 |
114.30 |
0.337 |
8.56 |
- |
P |
- |
P |
P |
- |
17.00 |
- |
4.500 |
114.30 |
0.380 |
9.65 |
- |
P |
- |
P |
P |
- |
18.90 |
- |
4.500 |
114.30 |
0.430 |
10.92 |
- |
P |
- |
P |
P |
- |
21.50 |
- |
4.500 |
114.30 |
0.500 |
12.70 |
- |
P |
- |
P |
P |
- |
23.70 |
- |
4.500 |
114.30 |
0.560 |
14.22 |
|
P |
|
P |
P |
- |
26.10 |
- |
4.500 |
114.30 |
0.630 |
16.00 |
- |
P |
- |
P |
P |
- |
Note: P - Flat Head; N - No Thickening; U - External Thickening; T&C - Turning Thread with Coupling; I - Integral Joint
Product Description:Casing
Standards: API SPEC 5CT, API SPEC 5B, ISO 11960
Casing Specifications:
Size code |
Weight code |
outer diameter |
Thickness |
End machining form |
Steel grade |
in |
mm |
in |
mm |
J55 K55 |
L80-1 |
N80 |
C90 |
C95 |
T95 |
P110 |
M65 |
4 1/2" |
9.50 |
4.500 |
114.30 |
0.205 |
5.21 |
PS |
- |
- |
- |
- |
- |
- |
- |
10.50 |
4.500 |
114.30 |
0.224 |
5.69 |
PSB |
- |
- |
- |
- |
- |
- |
- |
11.60 |
4.500 |
114.30 |
0.250 |
6.35 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
13.50 |
4.500 |
114.30 |
0.290 |
7.37 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
15.10 |
4.500 |
114.30 |
0.337 |
8.56 |
- |
- |
- |
- |
- |
- |
PLB |
- |
5" |
11.50 |
5.000 |
127.00 |
0.220 |
5.59 |
PS |
- |
- |
- |
- |
- |
- |
- |
13.00 |
5.000 |
127.00 |
0.253 |
7.52 |
PSLB |
- |
- |
- |
- |
- |
- |
- |
15.00 |
5.000 |
127.00 |
0.296 |
9.19 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
18.00 |
5.000 |
127.00 |
0.362 |
9.19 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
21.40 |
5.000 |
127.00 |
0.437 |
11.10 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
23.20 |
5.000 |
127.00 |
0.478 |
12.14 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
24.10 |
5.000 |
127.00 |
0.500 |
12.70 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
5 1/2" |
14.00 |
5.500 |
139.70 |
0.244 |
6.20 |
PS |
- |
- |
- |
- |
- |
- |
- |
15.50 |
5.500 |
139.70 |
0.275 |
6.98 |
PSLB |
- |
- |
- |
- |
- |
- |
- |
17.00 |
5.500 |
139.70 |
0.304 |
7.72 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
20.00 |
5.500 |
139.70 |
0.361 |
9.17 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
23.00 |
5.500 |
139.70 |
0.415 |
10.54 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
26.80 |
5.500 |
139.70 |
0.500 |
12.70 |
- |
- |
- |
P |
- |
P |
P |
P |
29.70 |
5.500 |
139.70 |
0.562 |
14.27 |
- |
- |
- |
P |
- |
P |
P |
P |
32.60 |
5.500 |
139.70 |
0.625 |
15.88 |
- |
- |
- |
P |
- |
P |
P |
P |
35.30 |
5.500 |
139.70 |
0.687 |
17.45 |
- |
- |
- |
P |
- |
P |
P |
P |
38.00 |
5.500 |
139.70 |
0.750 |
19.05 |
- |
- |
- |
P |
- |
P |
P |
P |
40.50 |
5.500 |
139.70 |
0.812 |
20.62 |
- |
- |
- |
P |
- |
P |
P |
P |
43.10 |
5.500 |
139.70 |
0.875 |
22.22 |
- |
- |
- |
P |
- |
P |
P |
P |
6 5/8" |
20.00 |
6.625 |
168.28 |
0.288 |
7.32 |
PSLB |
- |
- |
- |
- |
- |
- |
- |
24.00 |
6.625 |
168.28 |
0.352 |
8.94 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
28.00 |
6.625 |
168.28 |
0.417 |
10.59 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
32.00 |
6.625 |
168.28 |
0.475 |
12.06 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
7" |
20.00 |
7.000 |
177.80 |
0.272 |
6.91 |
PS |
- |
- |
- |
- |
- |
- |
PS |
23.00 |
7.000 |
177.80 |
0.317 |
8.05 |
PSLB |
PLB |
PLB |
PLB |
PLB |
- |
- |
PLB |
26.00 |
7.000 |
177.80 |
0.362 |
9.19 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
29.00 |
7.000 |
177.80 |
0.408 |
10.36 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
32.00 |
7.000 |
177.80 |
0.453 |
11.51 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
35.00 |
7.000 |
177.80 |
0.498 |
12.65 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
38.00 |
7.000 |
177.80 |
0.540 |
13.72 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
7 5/8" |
26.40 |
7.625 |
193.68 |
0.328 |
8.33 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
- |
29.70 |
7.625 |
193.68 |
0.375 |
9.52 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
33.70 |
7.625 |
193.68 |
0.430 |
10.92 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
39.00 |
7.625 |
193.68 |
0.500 |
12.70 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
42.80 |
7.625 |
193.68 |
0.562 |
14.27 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
45.30 |
7.625 |
193.68 |
0.595 |
15.11 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
47.10 |
7.625 |
193.68 |
0.625 |
15.88 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
8 5/8" |
24.00 |
8.625 |
219.08 |
0.264 |
6.71 |
PS |
- |
- |
- |
, - |
- |
- |
- |
28.00 |
8.625 |
219.08 |
0.304 |
7.72 |
- |
- |
- |
- |
- |
- |
- |
- |
32.00 |
8.625 |
219.08 |
0.352 |
8.94 |
PSLB |
- |
- |
- |
- |
- |
- |
- |
36.00 |
8.625 |
219.08 |
0.400 |
10.16 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
- |
40.00 |
8.625 |
219.08 |
0.450 |
11.43 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
44.00 |
8.625 |
219.08 |
0.500 |
12.70 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
49.00 |
8.625 |
219.08 |
0.557 |
14.15 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
9 5/8" |
32.30 |
9.625 |
244.48 |
0.312 |
7.92 |
- |
- |
- |
- |
- |
- |
- |
- |
36.00 |
9.625 |
244.48 |
0.352 |
8.94 |
PSLB |
- |
- |
- |
- |
- |
- |
PSLB |
40.00 |
9.625 |
244.48 |
0.395 |
10.03 |
PSLB |
PLB |
PLB |
PLB |
PLB |
PLB |
- |
PSLB |
43.50 |
9.625 |
244.48 |
0.435 |
11.05 |
- |
PLB |
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 |
PLB |
- |
58.40 |
9.625 |
244.48 |
0.595 |
15.11 |
- |
PLB |
PLB |
PLB |
PLB |
PLB |
PLB |
- |
59.40 |
9.625 |
244.48 |
0.609 |
15.47 |
- |
- |
- |
P |
- |
P |
- |
- |
64.90 |
9.625 |
244.48 |
0.672 |
17.07 |
- |
- |
- |
P |
- |
P |
- |
- |
70.30 |
9.625 |
244.48 |
0.734 |
18.64 |
- |
|
- |
P |
- |
P |
- |
- |
75.60 |
9.625 |
244.48 |
0.797 |
20.24 |
- |
- |
- |
P |
- |
P |
- |
- |
10 3/4" |
32.75 |
10.750 |
273.05 |
0.279 |
7.09 |
- |
- |
- |
- |
- |
- |
- |
- |
40.50 |
10.750 |
273.05 |
0.350 |
8.89 |
PSB |
- |
- |
- |
- |
- |
- |
PSB |
45.50 |
10.750 |
273.05 |
0.400 |
10.16 |
PSB |
- |
- |
- |
- |
- |
- |
PSB |
51.00 |
10.750 |
273.05 |
0.450 |
11.43 |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
55.50 |
10.750 |
273.05 |
0.495 |
12.57 |
- |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
60.70 |
10.750 |
273.05 |
0.545 |
13.34 |
- |
- |
- |
PSB |
- |
PSB |
PSB |
- |
65.70 |
10.750 |
273.05 |
0.595 |
15.11 |
- |
- |
- |
PSB |
- |
PSB |
PSB |
- |
73.20 |
10.750 |
273.05 |
0.672 |
17.07 |
- |
- |
|
P |
- |
P |
- |
- |
79.20 |
10.750 |
273.05 |
0.734 |
18.64 |
- |
- |
- |
P |
- |
P |
- |
- |
85.30 |
10.750 |
273.05 |
0.797 |
20.24 |
- |
- |
- |
P |
- |
P |
- |
- |
11 3/4" |
42.00 |
11.750 |
298.45 |
0.333 |
8.46 |
- |
- |
- |
- |
- |
- |
- |
- |
47.00 |
11.750 |
298.45 |
0.375 |
9.53 |
PSB |
- |
- |
- |
- |
- |
- |
PSB |
54.00 |
11.750 |
298.45 |
0.435 |
11.05 |
PSB |
- |
- |
- |
- |
- |
- |
PSB |
60.00 |
11.750 |
298.45 |
0.489 |
12.42 |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
65.00 |
11.750 |
298.45 |
0.534 |
13.56 |
- |
P |
P |
P |
P |
P |
P |
- |
71.0 |
11.750 |
298.45 |
0.582 |
14.78 |
- |
P |
P |
P |
P |
P |
P |
- |
13 3/8" |
48.00 |
13.375 |
339.72 |
0.330 |
8.38 |
- |
- |
- |
- |
- |
- |
- |
- |
54.50 |
13.375 |
339.72 |
0.380 |
9.65 |
PSB |
- |
- |
- |
- |
- |
- |
PSB |
61.00 |
13.375 |
339.72 |
0.430 |
10.92 |
PSB |
- |
- |
- |
- |
- |
- |
PSB |
68.00 |
13.375 |
339.72 |
0.480 |
12.19 |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
72.00 |
13.375 |
339.72 |
0.514 |
13.06 |
- |
PSB |
PSB |
PSB |
PSB |
PSB |
PSB |
- |
16 |
65.00 |
- |
406.40 |
- |
9.53 |
- |
- |
- |
- |
- |
- |
- |
- |
16 |
75.00 |
- |
406.40 |
- |
11.13 |
- |
- |
- |
- |
- |
- |
- |
- |
16 |
84.00 |
- |
406.40 |
- |
12.57 |
- |
- |
- |
- |
- |
- |
- |
- |
16 |
109.00 |
- |
406.40 |
- |
16.66 |
- |
- |
- |
- |
- |
- |
- |
- |
18 5/8" |
87.20 |
- |
473.08 |
- |
11.05 |
- |
- |
- |
- |
- |
- |
- |
- |
20 |
94.00 |
- |
508.00 |
- |
11.13 |
- |
- |
- |
- |
- |
- |
- |
- |
20 |
106.50 |
- |
508.00 |
- |
12.70 |
- |
- |
- |
- |
- |
- |
- |
- |
20 |
133.00 |
- |
508.00 |
- |
16.13 |
- |
- |
- |
- |
- |
- |
- |
- |
Note: P - Flat End; S - Short Round Thread; L - Long Round Thread; B - Bias Trapezoidal Thread
Cangzhou Shengao Petroleum Special Pipe Co., Ltd., founded on September 21, 2018, proudly resides in the vibrant heart of Cangzhou City, Hebei Province, specifically in Mengcun Hui Autonomous County, at the promising Meng Li Road North East. With a robust registered capital of 81.18 million yuan RMB, our company excels in a diverse range of innovative manufacturing and sales activities. Our expertise spans across deep-sea petroleum drilling equipment, specialized petroleum drilling machinery, precision fasteners, versatile metal tools, and high-quality hardware products. We also specialize in the creation of metal structures, metal chains, and various metal goods, providing exceptional metal cutting services to our esteemed clientele. Our portfolio extends to the sales of specialized oil drilling equipment, both deep-sea and onshore, along with premium anticorrosive and thermal insulation materials. We cater to the construction sector with our exquisite metal products, surface treatment, and heat treatments. Our retail sector features an extensive array of hardware items, valves, cock sales, pumps, vacuum equipment, fasteners, as well as plastic and rubber products. Our stock of high-quality special steel and metal chains stands unmatched. Additionally, we proudly engage in the import and export of goods, expanding our global footprint. All our operations, barring those requiring special approvals, are conducted independently and legally, adhering strictly to our business licenses.
Enterprise Certificate: