API 5CT Grade K55 Material Suppliers

K55 Casing Tube manufacturer in india.

Check K55 Seamless tubing Stock at best price.

API 5CT Stainless Steel Pipe

API 5CT Stainless Steel Pipe

NSSMC ERW Casing Tubing

NSSMC ERW Casing Tubing

K55 Gas API Casing Pipe

K55 Gas API Casing Pipe

Tubos India is one of the large manufacturers for high quality API 5CT K55 Tubes. API 5CT K55 casing pipe is very similar to J55 Casing Pipe. K55 and J55 have no significant difference in the yield strength and chemical compositions. But the tensile strength of K55 is higher than the J55 casing steel. API 5CT K55 has better thermal fatigue resistance and crack resistance.

In case of thermal production, the heavy wall of K55 casing is appropriate instead of J55 casing. In oil drilling, API K55 casing or tubing is relatively common type.

API 5CT K55 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.

K55 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 K55 Casing Tubing Steel Color Code

NameAPI 5Ct Casing J55API 5Ct Casing K55API 5Ct Casing N80-1API 5Ct Casing N80-QAPI 5Ct Casing L80-1API 5Ct Casing P110
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 K55 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-SB-----
4-1-211.6114.317.266.35-SLBLBLBLB-
4-1-213.5114.320.097.37--LBLB-
4-1-215.1114.322.478.56------LB
511.512717.115.59-SS-----
51312719.356.43-SLBSLB-----
51512722.327.52-SLBLBLB-
51812726.799.19--LBLB
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--LBLB-
5-1-223139.734.2310.54--LBLB
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---LBLBLB
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---LBLB
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--LBLBLB-
9-5-847244.4869.9411.99--LBLBLB
9-5-853.5244.4879.6213.84---LBLBLB
9-5-858.4244.4886.9115.11---LBLBLB
10-3-432.75273.0548.747.09S-------
10-3-440.5273.0560.278.89SSBSB-----
10-3-445.5273.0567.7110.16-SB-----
10-3-451273.0575.911.43-SBSBSB-
10-3-455.5273.0582.5912.57--SBSBSB-
10-3-460.7273.0590.3313.84-----SBSB
10-3-465.7273.0597.7715.11-----SBSB
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-SBSBSBSB
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-SBSBSB-
13-3-872339.72107.1513.06---SBSBSB
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 Gr. k55 Casing 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 K55 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
aIn case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method. 
bNo hardness limits are specified, but the maximum variation is restricted in accordance with 7.8 and 7.9 of API Spec. 5CT.

API 5CT K55 Casing Tubing Features

  • API 5CT K55 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%.
  • Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT K55 Casing Tubing coupling.
  • 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 K55 Casing Tubing should be smooth without any burr, tear or other defects that may have a negative impact on the strength and close connection.

It's important for oil and gas operators to protect their production well casings from corrosion with cathodic protection & API 5CT OilField Tubing primarily serves to transfer oil and gases.

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