API 5CT Casing & Pipe Tubing
Manufacturers &Suppliers

PandaPipe is your ultimate 1-Stop reliable manufacturer of quality API 5CT steel casings and pipe tubings.

API 5CT Casing & Pipe Tubing Specifications

api 5ct casings

API 5CT casing and tubing are essential components used in the oil and gas industry for well construction and completion. They serve distinct but interrelated purposes in drilling and extracting hydrocarbons from wells.

Standard API 5CT
Procedure ERW, SMLS
Dimensions Casing 114.3-508mm Tubing 26.67-114.3mm
Casing 4 1/2“ – 20″ Tubing Pipe  1.05” -4 1/2“
Thickness 5.21mm – 22.22mm
Steel Grade H40 N80-1
J55 L80Cr
K55 C90-1
N80 T95-1
N80Q C110
R95 P110
L80 Q125

API 5CT Casing & Tubing Size Chart

Outside Diameter API Casing List-Thickness
inch mm mm
4 1/2 114.3 5.21 5.69 6.35 7.37 8.56
5 127.0 5.59 6.43 7.52 9.19 11.10 12.14 12.70
5 1/2 139.7 6.20 6.98 7.72 9.17 10.54 12.70 14.27 15.88 17.45 19.05 20.62 22.22
6 5/8 168.3 7.32 8.94 10.59 12.06
7 177.8 5.87 6.91 8.05 9.19 10.36 11.51 12.65 13.72 15.88 17.45 19.05 20.62 22.22
7 5/8 193.7 7.62 8.33 9.52 10.92 12.70 14.27 15.11 15.88 17.45 19.05
7 3/4 196.9 15.11
8 5/8 219.1 6.71 7.72 8.94 10.16 11.43 12.70 14.15
9 5/8 244.5 7.92 8.94 10.03 11.05 11.99 13.84 15.11 15.47 17.07 18.64 20.24
10 3/4 273.1 7.09 8.89 10.16 11.43 12.57 13.84 15.11 17.07 18.64 20.24
11 3/4 298.5 8.46 9.53 11.05 12.42 13.56 14.78
13 3/8 339.7 8.38 9.65 10.92 12.19 13.06
16 406.4 9.53 11.13 12.57 16.68
18 5/8 473 11.05
20 508 11.13 12.70 16.13
Outside Diameter API Tubing List-Thickness
inch mm mm
1 26.7 2.87 3.91
1 1/3 33.4 3.38 4.55
1 2/3 42.2 3.18 3.56 4.85
1 8/9 48.3 3.18 3.68 5.08 6.35 7.62
2 1/9 52.4 3.06 5.72
2 3/8 60.3 4.24 4.83 6.45 7.49 8.53
2 7/8 73.0 5.51 7.01 7.82 8.64 9.96 11.18
3 1/2 88.9 5.49 6.45 7.34 9.52 10.92 12.09 13.46
4 101.6 5.74 6.65 8.38 10.54 12.70 15.49
4 1/2 114.3 6.88 8.56 9.65 10.92 12.70 14.22 16.00

Chemical Properties of API 5CT Casings & Tubings

API SPECIFICAthN 5CT
Chemical Composition, Mass Fraction (%)
Grade Type C Mn Mo Cr Ni Cu P S Si
min max min max min max min max max max max max max
1 2 3          4 4 5 6 7 8 9 10 11 12 13 14 15
H40 0.030     0.45
J55 0.030     0.45
K55 0.030     0.45
N80 1 0.030 0.030     0.45
N80 Q 0.030 0.030     0.45
R95 0.45c 1.9 0.030 0.030     0.45 0.45
L80 1 0.43a 1.9 0.25     0.35 0.35 0.030 0.030     0.45 0.45
L80 9Cr 0.15 0.30 0.60 0.90 1.10 8.00 10.0 0.50     0.25 0.25 0.020 0.030     0.45 1.00
L80 13Cr 0.15 0.22 0.25 1.00 12.0 14.0 0.50     0.25 0.25 0.020 0.030     0.45 1.00
C90 1 0.35 1.20 0.25b 0.85 1.50 0.99 0.020 0.030     0.45
T95 1 0.35 1.20 0.25b 0.85 0.40 1.50 0.99 0.020 0.030     0.45
C110 0.35 1.20 0.25 1.00 0.40 1.50 0.99 0.020 0.030     0.45
P110 e 0.030e 0.030e
Q125 1 0.35 1.35 0.85 1.50 0.99 0.020 0.010
NOTE   Elements shown shall be repored in product analysis.
  • a   The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched or polymer-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.
  • d   For EW Grade P110, the phosphorus content shall be 0.020% maximum and the sulfur content 0.010% maximum.

Mechanical Properties of API 5CT Casings & Tubings

Tensile and Hardness Requirements
GradeTypeTotal Elongation Under LoadYield strength MPaTensile strength
MPa
Hardness a,c
max
Specified Wall ThicknessAllowable
Hardness
Variation b
minmaxminHRCHBWmmHRC
12345678910
H400.5276552414 
J550.5379552517 
K550.5379552655 
N8010.5552758689 
N80Q0.5552758689 
R950.5655758724 
L8010.555265565523.0241 
L809Cr0.555265565523.0241 
L8013Cr0.555265565523.0241 
C9010.562172468925.4255≤12.70
12.71 to 19.04
19.05 to 25.39
≥25.40
3.0
4.0
5.0
6.0
T9510.565575872425.4255≤12.70
12.71 to 19.04
19.05 to 25.39
≥25.40
3.0
4.0
5.0
6.0
C1100.775882879330.0286≤12.70
12.71 to 19.04
19.05 to 25.39
≥25.40
3.0
4.0
5.0
6.0
P1100.6758965862
Q12510.658621034931b≤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, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9.
  • c   For through-wall hardness tests of Grades L80(all types), C90, T98 and C110, the requirements stated in HRC scale are for maximum mean hardness number.

API 5CT Standard Steel Grades

API 5CT Production Tolerance

Standard Mass Tolerances
Amount Tolerance
Single lengths +6.3%,-3.5%
Carload 18,144kg(40,000lb) or more -1.75%
Carload less than 18,144kg(40,000lb) -3.50%
other items 18,144kg(40,000lb) or more -1.75%
other items less than 18,144kg(40,000lb) -3.50%
Dimension Tolerances (pipe OD)
Label 1 Tolerances on Outside Diameter, D
< 4 1/2 +0.79 mm (±0.031in.)
≥ 4 1/2 +1% -0.5% D
 
Dimension Tolerances (upset integral tubing)
Label 1 Tolerances behind m or L0
≤3 1/2 mm +2.38 -0.7mm in.
>3 1/2 to ≤ 5 +2.78mm to-0.75 % D(+7/64 in. to-0.75 % D
>5 to ≤ 8 5/8 +3.18mm to-0.75 % D (+1/8 in. to-0.75 % D)
>8 5/8 +3.97 mm to -0.75 % D(+5/32 in. to-0.75 % D)

Why Choose PandaPipe as API 5CT Casing Supplier?

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Since our establishment in 1998, PandaPipe has been revolutionizing the API 5CT Casing & Pipe Tubing industry with a unique blend of wit, charm, and unmatched expertise. 

We are an unstoppable force, passionately serving a diverse range of industries such as Oil & Gas, Solar Energy, Construction, Machinery Manufacturing, etc.

Our streamlined processes flow seamlessly to guarantee that your projects are completed punctually. 

With PandaPipe as your trusted partner, do not need to worry about your order anymore. Each delivery fulfilled timely with efficiency.

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