API 5CT Casing & Pipe Tubing
Manufacturers
PandaPipe is your ultimate 1-Stop reliable manufacturer of quality API 5CT steel casings and pipe tubings.
API 5CT Casing and Tubing
API5CT Casing & Tubing is a specification developed by the American Petroleum Institute for casing and tubing. For the oil and gas industry to provide the quality of steel pipe products standards and unity.
Pandapipe provides you with high quality API 5CT Casing & Tubing manufactured in strict compliance with API 5CT regulations. Our steel pipes are API 5CT certified and we can provide you with product test documentation and support tripartite inspection. Ensure that your project is completed flawlessly and safely.
API 5CT Casing & Pipe Tubing Specifications
API 5CT Casing and Tubing is an important component of well construction and completion for the oil and gas industry. They have distinct, but interrelated, purposes for drilling and extracting hydrocarbons from Wells. Pandapipe can provide you with API 5CT Casing & Pipe Tubing for ERW and SMLS manufacturing processes.
| 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 Standard Steel Grades
| Specification | Minimum Yield Strength (MPa) | Suitable Application |
| API 5CT J55 | 379 ~ 552 | Suitable for medium level oil and gas drilling |
| API 5CT K55 | 379 ~ 552 | Suitable for deeper oil and gas drilling |
| API 5CT N80 | 552 ~ 758 | Suitable for high temperature and high pressure drilling |
| API 5CT R95 | High yield strength | Suitable for drilling with special requirements |
| API 5CT L80 | High yield strength | Suitable for high temperature and high pressure drilling |
| API 5CT P110 | 758 ~ 965 | Suitable for high temperature and high pressure drilling |
| API 5CT Q125 | Highest yield strength | Suitable for oil and gas drilling operations in extreme environments |
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 & Mechanical Properties of API 5CT Casings & Tubings
Chemical Composition of API 5CT Casings & Tubing
API 5CT Casings & Tubings consists mainly of elements such as carbon, manganese, phosphorus, and sulfur. API 5CT Casings & Tubings manufactured by Pandapipe strictly comply with the chemical composition requirements required by the API 5CT standard. Ensure that the products produced have good corrosion resistance and strength.
| 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. | ||||||||||||||
|
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Mechanical Properties of API 5CT Casings & Tubing
Our API 5CT Casings & Tubings fully meet and exceed the mechanical properties of API 5CT. The elongation, tensile strength and yield strength are all subject to strict quality control.
| Tensile and Hardness Requirements | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Grade | Type | Total Elongation Under Load | Yield strength MPa | Tensile strength MPa | Hardness a,c max | Specified Wall Thickness | Allowable Hardness Variation b | ||
| min | max | min | HRC | HBW | mm | HRC | |||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 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 | – | – | – | |
| L80 | 1 | 0.5 | 552 | 655 | 655 | 23.0 | 241 | – | |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23.0 | 241 | – | |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23.0 | 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 | 30.0 | 286 | ≤12.70 12.71 to 19.04 19.05 to 25.39 ≥25.40 | 3.0 4.0 5.0 6.0 |
| P110 | – | 0.6 | 758 | 965 | 862 | – | – | – | – |
| Q125 | 1 | 0.65 | 862 | 1034 | 931 | b | – | ≤12.70 12.71 to 19.04 19.05 | 3.0 4.0 5.0 |
| |||||||||
API 5CT Production Tolerance
The API 5CT standard has very strict requirements for manufacturing tolerances of steel pipe products for oil pipeline and oil field drilling. API 5CT Production Tolerance has a consistent effect on the size, appearance and quality of steel pipes, which further ensures the safety and reliability of oil pipeline and oilfield drilling operations.
| 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) |
Test of API 5CT Casings & Tubing
CVN impact test: A test to assess the resistance of API 5CT Casings & Tubings to shock and fracture under dynamic loading.
Flattening Test: The Flattening Test was used to evaluate the plastic deformation and flattening resistance of API 5CT Casings & Tubings.
Bend Test: By observing whether the sample has cracks, fractures, etc. To evaluate the mechanical properties of API 5CT Casings & Tubings when subjected to bending loads.
FAQs：
What is updated in the 11th edition of API 5CT
Thread processing: Update the special end thread processing requirements and expand the triangle mark requirements (such as allowing the use of vibration hammering on P110 steel grade pipe).
Material classification: Cancel the concept of material grouping of Groups 1-4, adjust the requirements of N80-1 steel grade, and eliminate M65 steel grade9.
Hardness and corrosion testing: Update the hardness requirements of L80, C90, T95 and C110 according to NACE MR0175, and optimize the SSC (sulfide stress corrosion) test method.
Download the 10th edition of API 5CT pdf
Differences between API 5CT N80 and L80
N80 has high carbon content and low alloy content, average corrosion resistance, minimum yield strength of 552MPa, and low cost.
L80 has high Cr content, good corrosion resistance, slightly higher strength, and higher cost.
N80: Preferred for shallow wells with simple geological conditions and cost sensitivity.
L80: Suitable for deep wells and highly corrosive environments (such as oil and gas fields containing H₂S or CO₂)
Why Choose PandaPipe
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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