API 5CT N80

TUSPIPE-TUBING-CASING-OCTG-API-5CT-N80

API 5CT N80

API 5CT N80 is a type of steel pipe that is typically used in well applications. It is manufactured to the specifications laid out in the API (American Petroleum Institute) standards. The N80 designation means that this pipe has been tested and meets specific mechanical and chemical properties requirements. This type of pipe is most often used in casing and tubing applications in the oil and gas industry. It is also known as OCTG (oil country tubular goods). The main difference between N80 and other steel grades is that this pipe has been specifically designed to protect against wellbore environments. As a result, it has higher levels of impact resistance and tensile strength than standard steel pipes.

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Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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The applications of API 5CT N80 casing and tubing

According to the American Petroleum Institute, API 5CT N80 casing and tubing are primarily used in well drilling operations to protect the wellbore. The N80 casing and tubing can be used in a variety of well environments, including high pressure and high temperature wells. In addition, the N80 casing and tubing is well suited for use in horizontal wells. The N80 casing and tubing is also commonly used in offshore drilling operations. The API 5CT N80 casing and tubing is manufactured according to strict quality control standards. As a result, the N80 casing and tubing is highly durable and can provide reliable well protection for many years.

Product Description of API 5CT N80

Product Name API 5CT N80
Size O. D 26.67-508mm
W. T 2.87-16.13mm
Length R1(5.49-6.71m),R2(8.23-9.14m),R3(11.58-13.72m)
Type of End Finish 1.Plain end 2.Short round thread 3.Long round thread 4.Buttress thread
Surface 1.Black Painted 2.With oil 3.Bared or as per customers’ requirement
Standard API 5CT
Application Tube for conveying gas, water, and oil in both and natural gas industries, etc.

Chemical Composition of API 5CT N80

Group Grade Type C Mn Mo Cr Ni max. Cu max. P max. S max. Si max.
min. max. min. max. min. max. min. max.
1 N80 1 0.03 0.03
2 N80 Q 0.03 0.03

Mechanical Analysis of API 5CT N80

API 5CT Casing Pipe Standard API 5CT Casing Pipe Type API 5CT Casing Pipe Tensile Strength MPa API 5CT Casing Pipe Yield Strength MPa API 5CT Casing Pipe Hardness Max.
API SPEC 5CT 1/Q ≥689 552 ~ 758

API 5CT N80 Casing and Tubing Specifications

- Specification & Size of API 5CT N80 Tubing

DN O. D. Weight W. T. End Processing
Non-upset coupling-thread Upset coupling-thread Steel Grade
in mm lb./ft. lb./ft. in mm H40 J55 L80 N80 C90 T95 P110
2 3/8 2.38 60.3 4 0.167 4.24 PU PN PN PN PN PN
4.6 4.7 0.19 4.83 PNU PNU PNU PNU PNU PNU PNU
5.8 5.95 0.254 6.45 PNU PNU PNU PNU PNU
6.6 0.295 7.49 P P P
7.35 7.45 0.336 8.53 PU PU PU
2 7/8 2.88 73 6.4 6.5 0.217 5.51 PNU PNU
7.8 7.9 0.276 7.01
8.6 8.7 0.308 7.82 PLB PLB PLBE PLB
9.35 9.45 0.34 8.64 PLB PLB PLBE PLB
10.5 0.392 9.96 PLB PLB PLB PLB
11.5 0.44 11.18 PLB
3 1/2 3.5 88.9 7.7 0.216 5.49 PN PN PN PN PN PN
9.2 9.3 0.254 6.45 PNU PNU PNU PNU PNU PNU PNU
10.2 0.289 7.34 PN PN PN PN PN PN
12.7 12.95 0.375 9.52 PNU PNU PNU PNU PNU
14.3 0.43 10.92 P P P
15.5 0.476 12.09 P P P
17 0.53 13.46 P P P
4 4 102 9.5 0.226 5.74 PN PN PN PN PN PN
11 0.262 6.65 PU PU PU PU PU PU
13.2 0.33 8.38 P P P
16.1 0.415 10.54 P P P
18.9 0.5 12.7 P P P
22.2 0.61 15.49 P P P
4 1/2 4.5 114 12.6 12.75 0.271 6.88 PNU PNU PNU PNU PNU PNU
15.2 0.337 8.56 P P P
17 0.38 9.65 P P P
18.9 0.43 10.92 P P P PLB
21.5 0.5 12.7 P P P PLB
23.7 0.56 14.22 P P P PLB
26.1 0.63 16 P P P PLB
P——Plain;N—— Non-upset coupling-thread;U—— Upset coupling-thread; L——Integral

- Specification & Size of API 5CT N80 Casing

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 9.5 14.14 0.205 5.21 PS PS
10.5 15.63 0.224 5.69 PSB
11.6 17.26 0.250 6.35 PSLB PLB PLB PLB PLB
13.5 20.09 0.290 7.37 PLB PLB PLB PLB
15.1 22.47 0.337 9.56 PLB
5 5.000 127 11.5 17.11 0.220 5.59 PS
13 19.35 0.253 6.43 PSLB
15 22.32 0.296 7.52 PSLB PLB PLB PLBE PLB
18 26.79 0.362 9.19 PLB PLB PLBE PLB
21.4 31.85 0.437 11.1 PLB PLB PLB PLB
23.2 34.53 0.478 12.14 PLB
24.1 35.86 0.500 12.7 PLB
5 1/2 5.500 139.7 14 20.83 0.244 6.2 PS PS
15.5 23.07 0.275 6.98 PSLB
17 25.3 0.304 7.72 PSLB PLB PLB PLBE PLB
20 29.76 0.361 9.17 PLB PLB PLBE PLB
23 34.23 0.415 10.54 PLB PLB PLBE PLB
26.8 39.88 0.500 12.7
29.7 44.2 0.562 14.27
32.6 48.51 0.625 15.88
35.3 52.53 0.687 17.45
38 56.55 0.750 19.05
40.5 60.27 0.812 20.62
43.1 64.14 0.875 22.22
6 5/8 6.625 168.28 20 29.76 0.288 7.32 PS PSLB
24 35.72 0.352 8.94 PSLB PLB PLB PLBE PLB
28 41.67 0.417 10.59 PLB PLB PLBE PLB
32 47.62 0.475 12.06 PLB PLB PLBE PLB
7 7.000 177.8 17 25.3 0.231 5.87 PS
20 29.76 0.272 6.91 PS PS
23 34.23 0.317 8.05 PSLB PLB PLB PLBE
26 38.69 0.362 9.19 PSLB PLB PLB PLBE PLB
29 43.16 0.408 10.36 PLB PLB PLBE PLB
32 47.62 0.453 11.51 PLB PLB PLBE PLB
35 52.09 0.498 12.65 PLB PLB PLBE PLB
38 56.55 0.540 13.72 PLB PLB PLBE PLB
42.7 63.54 0.625 15.88
46.4 69.05 0.687 17.45
50.1 74.56 0.750 19.05
53.6 79.77 0.812 20.62
57.1 84.97 0.875 22.22
7 5/8 7.625 193.68 24 35.72 0.300 7.62 PS
26.4 39.29 0.328 8.33 PSLB PLB PLB PLBE PLB
29.7 44.2 0.375 9.52 PLB PLB PLBE PLB
33.7 50.15 0.430 10.92 PLB PLB PLBE PLB
39 58.05 0.500 12.7 PLB PLB PLBE PLB
42.8 63.69 0.562 14.27 PLB PLB PLB PLB
45.3 67.41 0.595 15.11 PLB PLB PLB PLB
47.1 70.09 0.625 15.88 PLB PLB PLB PLB
51.2 76.19 0.687 17.45
55.3 80.3 0.750 19.05
8 5/8 8.625 219.08 24 35.72 0.264 6.71 PS
28 41.62 0.304 7.72 PS
32 47.62 0.352 8.94 PS PSLB
36 53.57 0.400 10.16 PSLB PLB PLB PLBE PLB
40 59.53 0.450 11.43 PLB PLB PLBE PLB
44 65.48 0.500 12.7 PLB PLB PLBE PLB
49 72.92 0.557 14.15 PLB PLB PLBE PLB
9 5/8 9.625 244.48 32.3 48.07 0.312 7.92 PS
36 53.57 0.352 8.94 PS PSLB
40 59.53 0.395 10.03 PSLB PLB PLB PLBE
43.5 64.73 0.435 11.05 PLB PLB PLBE PLB
47 69.94 0.472 11.99 PLB PLB PLBE PLB
53.5 79.62 0.545 13.84 PLB PLB PLBE PLB
58.4 86.91 0.595 15.11 PLB PLB PLB PLB
59.4 88.4 0.609 15.47
64.9 96.58 0.672 17.07
70.3 104.62 0.734 18.64
75.6 112.5 0.797 20.24
10 3/4 10.750 273.05 32.75 48.74 0.279 7.09 PS
40.5 60.27 0.350 8.89 PS PSB
15.5 67.71 0.400 10.16 PSB
51 75.9 0.450 11.43 PSB PSB PSB PSBE PSB
55.5 82.59 0.495 12.57 PSB PSB PSBE PSB
60.7 90.33 0.545 13.84 PSBE PSB
65.7 97.77 0.595 15.11 PSB PSB
73.2 108.93 0.672 17.07
79.2 117.86 0.734 18.64
85.3 126.94 0.797 20.24
11 3/4 11.750 42 62.5 0.333 8.46 PS
47 69.94 0.375 20.24
54 80.36 0.435 8.46
60 89.29 0.489 9.53
65 96.73 0.534 11.05
71 105.66 0.582 14.42
13 3/8 13.375 339.73 48 71.43 0.330 8.38 PS
54.5 81.1 0.380 9.65 PSB
61 90.78 0.430 10.92 PSB
68 101.19 0.480 12.19 PSB PSB PSB PSB PSB
72 107.15 0.514 13.06 PSB PSB PSB PSB
16 16.000 406.4 65 96.73 0.375 9.53 PS
75 111.61 0.438 11.13 PSB
84 125.01 0.495 12.57 PSB
109 162.21 0.656 16.66 P P P P
18 5/8 18.625 473.08 87.5 130.21 0.435 11.05 PS PSB
20 20.000 508 94 139.89 0.438 11.13 PSL PSLB
106.5 158.49 0.500 12.7 PSLB
133 197.93 0.635 16.13 PSLB
P——Plain;S——Short-thread;L——Long-thread;B——Buttress thread;E——Extreme thread
Line-Pipe
Line Pipe
Slotted-Liner
Slotted Liner
Pipe-Fabrication-Spooling
Steel Fabrication
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