API 5CT Grade N80 Tubing Material Supplier

N80 Casing Pipe Manufacturer in India.

Check 5CT N80 welding Casing Pipe dimension & Wide Stock at best price.

N80 Casing Tubing

N80 Casing Tubing

API 5CT N80 Welded Steel Pipe

API 5CT N80 Welded Steel Pipe

API 5CT N80 Oil Casing Pipe

API 5CT N80 Oil Casing Pipe

Tubos India is one of the large manufacturers for high quality API 5CT N80 Pipes. API 5CT N80 oil field Pipe contains N80-Q and N80-1 types. N80-Q and N80-1 both materials are consistent regarding the chemical composition, mechanical attributes. Both are various in the heat treatment. During the heat treatment, N80-Q steel is treated by tempering and quenching, while the N80-1 steel is treated by tempering and normalizing. Due to this the internal pressure and collapsing strength of N80-Q is higher than that of N80-1. Oilfield tubing & API 5CT Gr. N80 Casing Tubing can be widely applicable to construction, shipbuilding, petroleum, smelting, aviation, food, paper, electric power, medical equipment, boilers, chemical industry, heat exchangers, metallurgy

Specification includes 1.9 inch(48.3mm), 2 7/8 inch(73.03mm), 2 3/8 inch(60.3mm), 3 1/2 inch(88.9mm), 4 1/2 inch(114.3mm), 4 inch(101.6mm) etc. N80 mechanical properties are higher than other types of API 5CT. The oilfield tubing can be classified as EUE type and NUE type. Both sealing performance and mechanical property of the tubing are also required to correspond with the oil casing pipes. Due to high capability of N80, API 5CT casing pipes are widely applied in coal bed methane extraction, natural gas as well as in geothermal wells.

API 5CT Gr. N80 Casing Tubing Chemical Composition

GroupGradeTypeCMnMoCrNi max.Cu max.P max.S max.Si max.
min.max.min.max.min.max.min.max.
12345678910111213141516
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 Dimensions

Pipe Casing Sizes, Oilfield Casing Sizes & Casing Drift Sizes
Outer Diameter (Casing Pipe Sizes)4 1/2"-20", (114.3-508mm)
Standard Casing Sizes4 1/2"-20", (114.3-508mm)
Thread TypeButtress thread casing, Long round thread casing, Short round thread casing
FunctionIt 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 Grade N80 Casing Tubing Steel Color Code

NameJ55K55N80-1N80-QL80-1P110
Casinga bright green bandtwo bright green bandsa bright red banda bright red band + a green banda red band + a brown banda bright white band
Couplingentire green coupling + a white bandentire green couplingentire red couplingentire red coupling + a green bandentire red coupling + a brown bandentire white coupling

ISO/API casing/ API 5CT N80 Casing Tubing specifications

CodeaOuter DiaNominal weight
(with thread and
coupling) b,c
Wall ThicknessEnd processing type
mmkg/mmmH40J55M65L80N801C90dP110Q125d
InLb/ftK55C95N80QT95d
12345678910111213
4-1-29.5114.314.145.21SSS-----
4-1-210.5114.315.635.69-SBSB-----
4-1-211.6114.317.266.35-SLBLBLB-
4-1-213.5114.320.097.37--LBLB-
4-1-215.1114.322.478.56------LBLB
511.512717.115.59-SS-----
51312719.356.43-SLBSLB-----
51512722.327.52-SLBLBLB-
51812726.799.19--LBLBLB
521.412731.8511.1--LBLBLB
523.212734.5312.14---LBLB
524.112735.8612.7---LBLB
5-1-214139.720.836.2SSS-----
5-1-215.5139.723.076.98-SLBSLB-----
5-1-217139.725.37.72-SLBLBLB-
5-1-220139.729.769.17--LBLBLB-
5-1-223139.734.2310.54--LBLBLB
6-5-820168.2829.767.32SSLBSLB-----
6-5-824168.2835.728.94-SLBLBLB-
6-5-828168.2841.6710.59--LBLB-
6-5-832168.2847.6212.06---LBLB
717177.825.35.87S-------
720177.829.766.91SSS-----
723177.834.238.05-SLBLBLB--
726177.838.699.19-SLBLBLB-
729177.843.1610.36--LBLB-
732177.847.6211.51--LBLB-
735177.852.0912.65---LBLB
7-5-824193.6835.727.62S-------
7-5-826.4193.6839.298.33-SLBSLBLBLB-
7-5-829.7193.6844.29.52--LBLB-
7-5-833.7193.6850.1510.92--LBLB-
7-5-839193.6858.0412.7---LBLB
7-5-842.8193.6863.6914.27---LBLB
7-5-845.3193.6867.4115.11---LBLB
7-5-847.1193.6870.0915.88---LBLB
8-5-824219.0835.726.71-SS-----
8-5-828219.0841.677.72S-S-----
8-5-832219.0847.628.94SSLBSLB-----
8-5-836219.0853.5710.16-SLBSLBLBLB-
8-5-840219.0859.5311.43--LBLB-
8-5-844219.0865.4812.7---LB
8-5-849219.0872.9214.15---LBLB

CodeaOuter diameterNominal weight
(with thread
and coupling) b,c
Wall thicknessEnd processing type
mmkg/mmmH40J55M65L80N80C90dP110Q125d
InLb/ftK55C951, QT95d
12345678910111213
9-5-832.3244.4848.077.92S-------
9-5-836244.4853.578.94SSLBSLB-----
9-5-840244.4859.5310.03-SLBSLBLB--
9-5-843.5244.4864.7311.05--LBLB-
9-5-847244.4869.9411.99--LBLBLB
9-5-853.5244.4879.6213.84---LBLB
9-5-858.4244.4886.9115.11---LBLB
10-3-432.75273.0548.747.09S-------
10-3-440.5273.0560.278.89SSBSB-----
10-3-445.5273.0567.7110.16-SBSB-----
10-3-451273.0575.911.43-SBSBSBSBSBSB-
10-3-455.5273.0582.5912.57--SBSBSBSBSB-
10-3-460.7273.0590.3313.84-----SBSBSB
10-3-465.7273.0597.7715.11-----SBSBSB
11-3-442298.4562.58.46S-------
11-3-447298.4569.949.53-SBSB-----
11-3-454298.4580.3611.05-SBSB-----
11-3-460298.4589.2912.42-SBSBSBSBSBSBSB
13-3-848339.7271.438.38S-------
13-3-854.5339.7281.19.65-SBSB-----
13-3-861339.7290.7810.92-SBSB-----
13-3-868339.72101.1912.19-SBSBSBSBSBSB-
13-3-872339.72107.1513.06---SBSBSBSBSB
1665406.496.739.53S-------
1675406.4111.6111.13-SBSB-----
1684406.4125.0112.57-SBSB-----
18-5-887.5473.08130.2111.05SSBSB-----
2094508139.8911.13SLSLBSLB-----
20106.5508158.4912.7-SLBSLB-----
20133508197.9316.13-SLB------
S-Short round thread, L-Long round thread, B-Buttress thread
a. Code is used for ordering reference.
b. The nominal weight of threaded and coupled casing (column 2) is shown for reference only.
c. Martensitic chromium steel (L80 9Cr and 13Cr) differs from carbon steel in density. The shown weight of martensitic chromium steel is not an exact value. The mass correction factor 0.989 can be used.
d. C90, T95 and Q125 steel grade casing should be supplied according to specification, weight and wall thickness listed in the above table or order.

API 5CT N80 Casing Tubing Mechanical Properties

StandardTypeTensile Strength
MPa
Yield Strength
MPa
Hardness
Max.
API SPEC 5CTAPI 5CT Casing J55≥517379 ~ 552----
API 5CT Casing K55≥517≥655---
API 5CT Casing N80≥689552 ~ 758---
API 5CT Casing L80(13Cr)≥655552 ~ 655≤241HB
API 5CT Casing P110≥862758 ~ 965----

API 5CT N80 Casing Tubing Tensile & Hardness Requirement

GroupGradeTypeTotal elongation under load %Yield strength MPaTensile strength min. MPaHardness a max.Specified wall thickness mmAllowable hardness variation b HRC
min.max . HRCHBW
1234567891011
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 in accordance with 7.8 and 7.9 of API Spec. 5CT.

API 5CT N80 Casing Tubing Features

  • API 5CT N80 Casing Tubing is offered with a free length range from 8m 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%.
  • Any deformation such as hairline, separation, crease, 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.
  • The surface of thread of coupling and API 5CT N80 Casing Tubing should be smooth without any tear, burr or other defects that may have a negative impact on the strength and close connection.
  • Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT N80 Casing Tubing coupling.

Offering N80 Gas and Oil Api Casing Pipe of high range and excellent quality as per API 5CT specifications.

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