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.

Why choose tuspipe?

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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 NameAPI 5CT N80
SizeO. D26.67-508mm
W. T2.87-16.13mm
LengthR1(5.49-6.71m),R2(8.23-9.14m),R3(11.58-13.72m)
Type of End Finish1.Plain end
2.Short round thread
3.Long round thread
4.Buttress thread
Surface1.Black Painted
2.With oil
3.Bared or as per customers’ requirement
StandardAPI 5CT
ApplicationTube for conveying gas, water, and oil in both and natural gas industries, etc.

Chemical Composition of API 5CT N80

GroupGradeTypeCMnMoCrNi max.Cu max.P max.S max.Si max.
min.max.min.max.min.max.min.max.
1N801––––––––––0.030.03–
2N80Q––––––––––0.030.03–

Mechanical Analysis of API 5CT N80

API 5CT Casing Pipe StandardAPI 5CT Casing Pipe TypeAPI 5CT Casing Pipe Tensile Strength
MPa
API 5CT Casing Pipe Yield Strength
MPa
API 5CT Casing Pipe Hardness
Max.
API SPEC 5CT1/Q≥689552 ~ 758—

API 5CT N80 Casing and Tubing Specifications

- Specification & Size of API 5CT N80 Tubing

DNO. D.WeightW. T.End Processing
Non-upset coupling-threadUpset coupling-threadSteel Grade
inmmlb./ft.lb./ft.inmmH40J55L80N80C90T95P110
2 3/82.3860.34–0.1674.24PUPNPNPNPNPN–
4.64.70.194.83PNUPNUPNUPNUPNUPNUPNU
5.85.950.2546.45––PNUPNUPNUPNUPNU
6.6–0.2957.49––P–PP–
7.357.450.3368.53––PU–PUPU–
2 7/82.88736.46.50.2175.51PNUPNU–––––
7.87.90.2767.01–––––––
8.68.70.3087.82––PLBPLBPLBE–PLB
9.359.450.348.64––PLBPLBPLBE–PLB
10.5–0.3929.96––PLBPLBPLB–PLB
11.5–0.4411.18––––PLB– 
3 1/23.588.97.7–0.2165.49PNPNPNPNPNPN–
9.29.30.2546.45PNUPNUPNUPNUPNUPNUPNU
10.2–0.2897.34PNPNPNPNPNPN–
12.712.950.3759.52––PNUPNUPNUPNUPNU
14.3–0.4310.92––P–PP–
15.5–0.47612.09––P–PP–
17–0.5313.46––P–PP–
441029.5–0.2265.74PNPNPNPNPNPN–
–110.2626.65PUPUPUPUPUPU–
13.2–0.338.38––P–PP–
16.1–0.41510.54––P–PP–
18.9–0.512.7––P–PP–
22.2–0.6115.49––P–PP–
4 1/24.511412.612.750.2716.88PNUPNUPNUPNUPNUPNU–
15.2–0.3378.56––P–PP–
17–0.389.65––P–PP–
18.9–0.4310.92––P–PPPLB
21.5–0.512.7––P–PPPLB
23.7–0.5614.22––P–PPPLB
26.1–0.6316––P–PPPLB
P——Plain;N—— Non-upset coupling-thread;U—— Upset coupling-thread; L——Integral

- Specification & Size of API 5CT N80 Casing

DNO. D.WeightW. T. End Machining Form
 Steel Grade
inmmlb/ftkg/minmmH40J55L80N80C90P110
K55T95
4 1/24.500114.39.514.140.2055.21PSPS––––
10.515.630.2245.69–PSB––––
11.617.260.2506.35–PSLBPLBPLBPLBPLB
13.520.090.2907.37––PLBPLBPLBPLB
15.122.470.3379.56–––––PLB
55.00012711.517.110.2205.59–PS––––
1319.350.2536.43–PSLB––––
1522.320.2967.52–PSLBPLBPLBPLBEPLB
1826.790.3629.19––PLBPLBPLBEPLB
21.431.850.43711.1––PLBPLBPLBPLB
23.234.530.47812.14––––PLB–
24.135.860.50012.7––––PLB–
5 1/25.500139.71420.830.2446.2PSPS––––
15.523.070.2756.98–PSLB––––
1725.30.3047.72–PSLBPLBPLBPLBEPLB
2029.760.3619.17––PLBPLBPLBEPLB
2334.230.41510.54––PLBPLBPLBEPLB
26.839.880.50012.7––––––
29.744.20.56214.27––––––
32.648.510.62515.88––––––
35.352.530.68717.45––––––
3856.550.75019.05––––––
40.560.270.81220.62––––––
43.164.140.87522.22––––––
6 5/86.625168.282029.760.2887.32PSPSLB––––
2435.720.3528.94–PSLBPLBPLBPLBEPLB
2841.670.41710.59––PLBPLBPLBEPLB
3247.620.47512.06––PLBPLBPLBEPLB
77.000177.81725.30.2315.87PS–––––
2029.760.2726.91PSPS––––
2334.230.3178.05–PSLBPLBPLBPLBE–
2638.690.3629.19–PSLBPLBPLBPLBEPLB
2943.160.40810.36––PLBPLBPLBEPLB
3247.620.45311.51––PLBPLBPLBEPLB
3552.090.49812.65––PLBPLBPLBEPLB
3856.550.54013.72––PLBPLBPLBEPLB
42.763.540.62515.88––––––
46.469.050.68717.45––––––
50.174.560.75019.05––––––
53.679.770.81220.62––––––
57.184.970.87522.22––––––
7 5/87.625193.682435.720.3007.62PS–––––
26.439.290.3288.33–PSLBPLBPLBPLBEPLB
29.744.20.3759.52––PLBPLBPLBEPLB
33.750.150.43010.92––PLBPLBPLBEPLB
3958.050.50012.7––PLBPLBPLBEPLB
42.863.690.56214.27––PLBPLBPLBPLB
45.367.410.59515.11––PLBPLBPLBPLB
47.170.090.62515.88––PLBPLBPLBPLB
51.276.190.68717.45––––––
55.380.30.75019.05––––––
8 5/88.625219.082435.720.2646.71–PS––––
2841.620.3047.72PS–––––
3247.620.3528.94PSPSLB––––
3653.570.40010.16–PSLBPLBPLBPLBEPLB
4059.530.45011.43––PLBPLBPLBEPLB
4465.480.50012.7––PLBPLBPLBEPLB
4972.920.55714.15––PLBPLBPLBEPLB
9 5/89.625244.4832.348.070.3127.92PS–––––
3653.570.3528.94PSPSLB––––
4059.530.39510.03–PSLBPLBPLBPLBE–
43.564.730.43511.05––PLBPLBPLBEPLB
4769.940.47211.99––PLBPLBPLBEPLB
53.579.620.54513.84––PLBPLBPLBEPLB
58.486.910.59515.11––PLBPLBPLBPLB
59.488.40.60915.47––––––
64.996.580.67217.07––––––
70.3104.620.73418.64––––––
75.6112.50.79720.24––––––
10 3/410.750273.0532.7548.740.2797.09PS–––––
40.560.270.3508.89PSPSB––––
15.567.710.40010.16–PSB––––
5175.90.45011.43–PSBPSBPSBPSBEPSB
55.582.590.49512.57––PSBPSBPSBEPSB
60.790.330.54513.84––––PSBEPSB
65.797.770.59515.11––––PSBPSB
73.2108.930.67217.07––––––
79.2117.860.73418.64––––––
85.3126.940.79720.24––––––
11 3/411.750 4262.50.3338.46PS–––––
4769.940.37520.24––––––
5480.360.4358.46––––––
6089.290.4899.53––––––
6596.730.53411.05––––––
71105.660.58214.42––––––
13 3/813.375339.734871.430.3308.38PS–––––
54.581.10.3809.65–PSB––––
6190.780.43010.92–PSB––––
68101.190.48012.19–PSBPSBPSBPSBPSB
72107.150.51413.06––PSBPSBPSBPSB
1616.000406.46596.730.3759.53PS–––––
75111.610.43811.13–PSB––––
84125.010.49512.57–PSB––––
109162.210.65616.66–PPP–P
18 5/818.625473.0887.5130.210.43511.05PSPSB––––
2020.00050894139.890.43811.13PSLPSLB––––
106.5158.490.50012.7–PSLB––––
133197.930.63516.13–PSLB––––
P——Plain;S——Short-thread;L——Long-thread;B——Buttress thread;E——Extreme thread
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