API 5CT N80 CASING

Technical data

N80 TUBING SIZES, CASING DRIFT SIZES AND AVAILABLE GRADES

OD	Wall	PE # / ft	T&C # / ft	Collar	API Drift	Available Grades
2.375″	.190	4.44	4.7	EUE, AB MOD	1.901	J55, J-FBNAU, N80, L80, P110
2.875″	.217	6.17	6.5	EUE, AB MOD	2.347	J55, J-FBNAU, N80, L80, P110
3.5″	.254	8.81	9.3	EUE, AB MOD	2.867	J55, J-FBNAU, N80, L80, P110

Casing Sizes And Grades, Casing And Tubing Dimensions

Pipe Casing Sizes, Oilfield Casing Sizes & Casing Drift Sizes
Outer Diameter (Casing Pipe Sizes)	4 1/2"-20", (114.3-508mm)
Standard Casing Sizes	4 1/2"-20", (114.3-508mm)
Thread Type	Buttress thread casing, Long round thread casing, Short round thread casing
Function	It can protect the tubing pipe.

Oil Tube For Petroleum And Natural Gas Industries

Name of Pipes	Specification			Steel Grade	Standard
	D	(S)	(L)
	(mm)	(mm)	(m)
Petroleum Casing Pipe	127-508	5.21-16.66	6-12	J55. M55. K55. L80. N80. P110.	API Spec 5CT (8)
Petroleum Tubing	26.7-114.3	2.87-16.00	6-12	J55. M55. K55. L80. N80. P110.	API Spec 5CT (8)
Coupling	127-533.4	12.5-15	6-12	J55. M55. K55. L80. N80. P110.	API Spec 5CT (8)

API 5CT N80 Casing Tubing Chemical Composition, mass fraction (%)

Group	Grade	Type	C		Mn		Mo		Cr		Ni max.	Cu max.	P max.	S max.	Si max.
Group	Grade	Type	min.	max.	min.	max.	min.	max.	min.	max.	Ni max.	Cu max.	P max.	S max.	Si 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. b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm. c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched. d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm. e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum. NL = no limit. Elements shown shall be reported in product analysis.

API 5CT N80 Casing Tubing Mechanical Properties

Standard	Type	Tensile Strength MPa	Yield Strength MPa	Hardness Max.
API SPEC 5CT	J55	≥517	379 ~ 552	----
	K55	≥517	≥655	---
	N80	≥689	552 ~ 758	---
	L80(13Cr)	≥655	552 ~ 655	≤241HB
	P110	≥862	758 ~ 965	----

Group	Grade	Type	Total elongation under load %	Yield strength MPa		Tensile strength min. MPa	Hardness a max.		Specified wall thickness mm	Allowable hardness variation b HRC
Group	Grade	Type	Total elongation under load %	min.	max .		HRC	HBW	Specified wall thickness mm	Allowable hardness variation b HRC
1	2	3	4	5	6	7	8	9	10	11
1	H40	-	0.5	276	552	414	-	-	-	-
	J55	-	0.5	379	552	517	-	-	-	-
	K55	-	0.5	379	552	655	-	-	-	-
	N80	1	0.5	552	758	689	-	-	-	-
	N80	Q	0.5	552	758	689	-	-	-	-
	R95	-	0.5	655	758	724	-	-	-	-
2	M65	-	0.5	448	586	586	22	235	-	-
	L80	1	0.5	552	655	655	23	241	-	-
	L80	9Cr	0.5	552	655	655	23	241	-	-
	L80	13Cr	0.5	552	655	655	23	241	-	-
	C90	1	0.5	621	724	689	25.4	255	≤ 12.70 12.71 to 19.04 19.05 to 25.39 ≥ 25.40	3.0 4.0 5.0 6.0
	T95	1	0.5	655	758	724	25.4	255	≤ 12.70 12.71 to 19.04 19.05 to 25.39 ≥ 25.40	3.0 4.0 5.0 6.0
	C110	-	0.7	758	828	793	30	286	≤ 12.70 12.71 to 19.04 19.05 to 25.39. ≥ 25.40	3.0 4.0 5.0 6.0
3	P110	-	0.6	758	965	862	-	-	-	-
4	Q125	1	0.65	862	1034	931	b	-	≤ 12.70 12.71 to 19.04 ≥ 19.05	3.0 4.0 5.0
a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method. b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9 of API Spec. 5CT.

API 5CT N80 Casing Tubing Steel color code

Name	J55	K55	N80-1	N80-Q	L80-1	P110
Casing	a bright green band	two bright green bands	a bright red band	a bright red band + a green band	a red band + a brown band	a bright white band
Coupling	entire green coupling + a white band	entire green coupling	entire red coupling	entire red coupling + a green band	entire red coupling + a brown band	entire white coupling

API 5CT N80 Casing Tubing is offered with a free length range from 8 to 13m on basis of the SY/T6194-96 norm. However, it is also available no less than 6m length and its quantity should be no more than 20%API 5CT N80 Casing Tubing Features

Any deformation such as crease, hairline, separation, crack or scab is not acceptable on both inner and outer surfaces of the product. All these defects should be completely removed, and the removed depth must not exceed 12.5% of nominal wall thickness.
Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT N80 Casing Tubing coupling
The surface of thread of coupling and API 5CT N80 Casing Tubing should be smooth without any burr, tear or other defects that may have a negative impact on the strength and close connection.

API 5CT N80 Casing Tubing Packaging

In compliance with the regulation of SY/T6194-96, the domestic API 5CT N80 Casing Tubing should be strapped with steel wire or belt. The protection ring should be screwed on the exposed part of the thread of each casing pipe and its coupling to well protect the thread.