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API 5CT Casing Pipe

Dimension:OD: 114.3-508mm

WT: 5.21-16.13mm

Grade:Casing:JSS,KSS,N80-1,N80-Q,L80-1,L80-9Cr,L80-13Cr,C95,P110,Q125.

Thread types:STC,LTC,BTC etc

Standards and Technical Conditions for Supply:API Spec 5CT - Specification 5CT/ISO11960,Specification for Casing and Tubing,Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells

Casings are used for fixing the well wall or down hole, which have wider diameters, can be divided into conductor casings, technical casings and Oil casings.

LabelsA4:J46A4:J53
OD(mm)WT(mm)J55/K55N80L80C90/T95P110Q125
4 1/29.5114.35.21PS-----
10.5114.35.69PSB-----
11.6114.36.36PSLBPLBPLBPLBPLB-
13.5114.37.37-PLBPLBPLBPLB-
15.1114.38.56----PLBPLB
511.51275.59PS-----
136.43PSLB-----
157.52PSLBEPLBEPLBEPLBEPLBE-
189.19-PLBEPLBEPLBEPLBEPLBE
21.411.1-PLBPLBPLBPLBPLB
23.212.14-PLBPLBPLBPLBPLB
24.112.7-PLBPLBPLBPLBPLB
5 1/214139.76.2PS-----
15.56.98PSLBE-----
177.72PSLBEPLBEPLBEPLBEPLBE-
209.17-PLBEPLBEPLBEPLBE-
2310.54-PLBEPLBEPLBEPLBEPLBE
26.812.7---P--
29.714.27---P--
32.615.88---P--
35.317.45---P--
3819.05---P--
40.520.62---P--
43.164.14---P--
6 5/820168.287.32PSLB -----
248.94PSLBEPLBEPLBEPLBEPLBE-
2810.59-PLBEPLBEPLBEPLBEPLBE
3212.06-PLBEPLBEPLBEPLBE-
720177.86.91PS -----
238.05PSLBEPLBEPLBEPLBEPLBE-
269.19PSLBEPLBEPLBEPLBEPLBE-
2910.6
PLBEPLBEPLBEPLBE-
3211.51
PLBEPLBEPLBEPLBE-
3512.65
PLBEPLBEPLBEPLBEPLBE
3813.72
PLBEPLBEPLBE-PLBE
7 5/826.4193.678.33PSLBEPLBEPLBEPLBE--
29.79.52-PLBEPLBEPLBEPLBE-
33.710.92-PLBEPLBEPLBEPLBE-
3912.7-PLBEPLBEPLBEPLBEPLBE
42.814.27-PLBPLBPLBPLBPLB
45.315.11-PLBPLBPLBPLBPLB
47.115.88-PLBPLBPLBPLBPLB
8 5/824219.086.71PS-----
287.72------
328.94PSLBE-----
3610.16PSLBEPLBEPLBEPLBE--
4011.43-PLBEPLBEPLBEPLBE-
4412.7-PLBEPLBEPLBEPLBE-
4914.15-PLBEPLBEPLBEPLBEPLBE
9 5/836244.488.94PSLB-----
4010.03PSLBEPLBEPLBEPLBE--
43.511.05-PLBEPLBEPLBEPLBE-
4711.99-PLBEPLBEPLBEPLBEPLBE
53.513.84-PLBEPLBEPLBEPLBEPLBE
58.415.11-PLBPLBPLBPLBPLB
10 3/440.5273.058.89PSB-----
45.510.16PSBE-----
5111.43PSBEPSBEPSBEPSBEPSBE-
5512.57-PSBEPSBEPSBEPSBE-
60.713.84---PSBEPSBEPSBE
65.715.11---PSBPSBPSB
113/447298.459.53PSB-----
5411.05PSB-----
6012.42PSBPSBPSBPSBPSBPSB
13 3/848339.728.38------
54.59.65PSB-----
6110.92PSB-----
6812.19PSBPSBPSBPSBPSB-
7213.06-PSBPSBPSBPSBPSB
167540611.13PSB-----

8412.57PSB-----

10916.66PPP-PP
209450811.13PSLB-----
309676216.1PSLB-----
P-Plain   end;S-Short round threat;L-Long round thread;B-Buttress thread;E-Extreme   line;


API Spec 5CT-Specification 5CT/ISO 11960,Specification for Casting and Tubing,Eighth Edition,Petroleum and natural gas industries-steel pipes for use as casing or tubing for wells


Mechanical Properties

GradeTypeTotal Elongation under load %Yield strength Mpa
Tensile Strength Min MpaHardnessSpecified wall thickness mmAllowable Hardness variation
MinMaxHRCHBWHRC
J55-0.5379552517----
K55-0.5379552655----
N8010.5552758689----

Q0.5552758689----
M65-0.544858658622235--
L8010.555265565523241--
9Cr0.555265565523241--
13Cr0.555265565523241--
C901.20.562172468925.4255≤12.73
1.20.562172468925.425512.71-19.044
1.20.562172468925.425519.05-25.395
1.20.562172468925.4255≥25.46
C95-0.5655724724----
T951.20.565572472425.4255≤12.73
1.20.565572472425.425512.71-19.044
1.20.565572472425.425519.05-25.395
1.20.565572472425.4255≥25.46
P110-0.6758965862----
Q125All0.658621034931b-≤12.73.0
All0.658621034931b-12.71-19.044.0
All0.658621034931b-≥19.055.0


Chemical Composition

StandardGradeComposition(%)
CSiMnPSCrNiCuMoVAls
API Spec 5CTJ550.34-0.390.20-0.351.25-1.50≤0.020≤0.015≤0.15≤0.20≤0.20//≤0.020
K55
N800.34-0.380.20-0.351.45-1.70≤0.020≤0.015≤0.15///0.11-0.16≤0.020
L800.15-0.22≤1.000.25-1.00≤0.020≤0.01012.0-14.0≤0.20≤0.20//≤0.020
P1100.26-0.350.17-0.370.40-0.70≤0.020≤0.0100.80-1.10≤0.20≤0.200.15-0.25≤0.08≤0.020