Active Member
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Address: 2217,Taida South Tower,Yingbin North Road, Cangzhou,Hebei, China
Contact name:Melody C.
Cangzhou High Booming Pipe Equipment Co.,Ltd |
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The N80 oil and gas API casing pipe contains N80-1 and N80-Q types. These two materials are consistent in the chemical composition and mechanical properties, and are just different in the heat treatment. This type of product is commonly used in the oil drilling process.
As its mechanical properties are higher than J55 and K55 types, it can be applied to some slightly more complicated formations. With deeper down hole depth than J55 and K55 types, it can be used for the exploitation of middle-level oil and gas. Due to the high performance of N80 material, this API casing pipe is extensively used in natural gas and coal bed methane extraction, as well as geothermal wells.
Specifications
1. Outer diameter
4 1/2", 5", 5 1/2", 6 5/8", 7", 7 5/8", 9 5/8", 10 3/4", 13 3/8",
16", 18 5/8", 20"
2. Wall thickness
5.21 - 16.13 mm
3. Thread type
SC(Short round thread), LC(Long round thread), BC(Buttress thread)
4. Length
R1(4.88-7.62m), R2(7.62-10.36m), R3(10.36-14.63m)
Process of manufacture and heat treatment
| Group | Grade | Type | Manufacturing process a | Heat treatment | Tempering temperature °C min |
| 1 | 2 | 3 | 4 | 5 | 6 |
| 1 | H40 | - | S or EW | - | - |
| J55 | - | S or EW | - b | - | |
| K55 | - | S or EW | - b | - | |
| N80 | 1 | S or EW | c | - | |
| N80 | Q | S or EW | Q d | - | |
| R95 | - | S or EW | Q | 538 | |
| 2 | M65 | - | S or EW | e | - |
| L80 | 1 | S or EW | Q | 566 | |
| L80 | 9Cr | S | Q f | 593 | |
| L80 | 13Cr | S | Q f | 593 | |
| C90 | 1 | S | Q | 621 | |
| T95 | 1 | S | Q | 649 | |
| C110 | - | S | Q | 649 | |
| 3 | P110 | - | S or EW g, h | Q | - |
| 4 | Q125 | 1 | S or EW h | Q | - |
a S = seamless process; EW = electric-welded process.
c Full-body, full-length heat treatment is mandatory. At the
manufacturer's option, the product shall be either normalized or
normalized and tempered. d Includes the method of interrupted quenching followed by controlled cooling.
f Type 9Cr and 13Cr may be air-quenched. g Special chemical requirements for electric-welded P110 pipe are specified in Table C.4 of API Spec. 5CT.
P110 and Q125 are specified in A.6 SR11 of API Spec. 5CT. | |||||
Chemical composition, mass fraction (%)
| 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 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 1 | H40 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
| J55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| K55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| N80 | 1 | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| N80 | Q | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| R95 | - | - | 0.45 c | - | 1.9 | - | - | - | - | - | - | 0.03 | 0.03 | 0.45 | |
| 2 | M65 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
| L80 | 1 | - | 0.43 a | - | 1.9 | - | - | - | - | 0.25 | 0.35 | 0.03 | 0.03 | 0.45 | |
| L80 | 9Cr | - | 0.15 | 0.3 | 0.6 | 0.9 | 1.1 | 8 | 10 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1 | - | - | 12 | 14 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| C90 | 1 | - | 0.35 | - | 1.2 | 0.25 b | 0.85 | - | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| T95 | 1 | - | 0.35 | - | 1.2 | 0.25 d | 0.85 | 0.4 | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| C110 | - | - | 0.35 | - | 1.2 | 0.25 | 1 | 0.4 | 1.5 | 0.99 | - | 0.02 | 0.005 | - | |
| 3 | P110 | e | - | - | - | - | - | - | - | - | - | - | 0.030 e | 0.030 e | - |
| 4 | Q125 | 1 | - | 0.35 | 1.35 | - | 0.85 | - | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched.
c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched.
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Our company is a specialized N80 oil and gas API casing pipe manufacturer and supplier in China. We offer various types of products such as K55 API 5CT casing /tubing, perforated pipe, tubing coupling, and EUE API tubing.
