| After-sales Service: | 24 Hours Online Service |
|---|---|
| Warranty: | 24 Months |
| Type: | Seamless |
| Technique: | Hot Rolled |
| Material: | Carbon Steel |
| Surface Treatment: | Black |
| Samples: |
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| Customization: |
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Audited Supplier 
Sizes:
Out Diameter: 1.315"- 20"
Wall Thickness: 0.133"-0.500"
Length:R1(group1),R2(group2),R3(group3)
Materials & Grades:
Casing: J55, K55, N80, L80, P110
Application:
oil well extracting
borehole
borewell
Types:
Seamless Casing
ERW Casing
Connections:
P(Plain End)
STC (short threads)
LTC (long threads)
BTC (buttress threads)
Premium gas-tight connectors
Non-upset ends (NUE)
External upset ends (EUE)
Premium gas-tight connectors
Others special connectors
Chemical compositions of casing pipe
| Standard | Grade | Chemical compositions(%) | |||||||||
| API SPEC 5CT | J55 | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V |
| K55 | 0.34~0.39 | 0.20~0.35 | 1.25~1.50 | ≤0.020 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.20 | / | / | |
| N80 | 0.34~0.38 | 0.20~0.35 | 1.45~1.70 | ≤0.020 | ≤0.015 | ≤0.15 | / | / | / | 0.11~0.16 | |
| L80 | 0.15~0.22 | ≤1.00 | 0.25~1.00 | ≤0.020 | ≤0.010 | 12.0~14.0 | ≤0.20 | ≤0.20 | / | / | |
| P110 | 0.26~0.395 | 0.17~0.37 | 0.40~0.70 | ≤0.020 | ≤0.010 | 0.80~1.10 | ≤0.20 | ≤0.20 | 0.15~0.25 | ≤0.08 | |
Mechanical properties of casing pipe
| Grade | Type |
Total elongation under load (%) |
Yield strength (min)Mpa |
Yield strength (max)Mpa |
Tensile strength min Mpa |
Hardness Max (HRC) |
Hardness Max (HBW) |
| 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 | - | - |
| 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 | - | 0.5 | 621 | 724 | 689 | 25.4 | 255 |
| C95 | - | 0.5 | 655 | 758 | 724 | - | - |
| T95 | - | 0.5 | 655 | 758 | 724 | 25.4 | 255 |
| P110 | - | 0.6 | 758 | 965 | 862 | - | - |
| Q125 | All | 0.65 | 862 | 1034 | 931 | - | - |
Casing Pipe Manufacturing Process:
Steel ingot heating → hydraulic punching → reheating → extension → periodic rolling → reheating → sizing → cooling → straightening → pipe cutting → inspection
1. An annular heating furnace is required for ingot heating;
2. Punching and reheating with hydraulic press;
3. The oil casing plant uses a two-roller guide plate extension machine for extension;
4. Re-use a disc heating furnace for periodic rolling, and use a non-entry furnace for reheating, cooling, straightening, pipe cutting, and inspection.
Color Codes for API 5CT Casing and Tubing:
Q1. What are your company's main products ?
A2: Our main products are carbon steel seamless pipe, pipe fittings(flange,elbow, tee, reducer,nipple etc.), and sheets, pipes, coils, strips, bars and channels.
Q2. What are the advantages of your company ?
A2: Offering finest quality-best in class products-at the most advantageous rates, as our forte.
Q3. How do you control quality ?
A3: A quality control team supervises quality assurance and control aspects along with the entire process system by recognizing and associating with the quality circle. The quality control tests are conducted regularly in order to maintain a consistent and uniform product quality.
Q4. How many coutries you already exported ?
A4: Exported to more than 50 countries mainly from Middle East, Russia, United States, Canada, Italy, Germany, Australia, Egypt, Japan, Indonesia, Bangladesh, Turkey, India, etc.
Q5. Can you provide sample ? Do you support OEM ?
A5: Yes. Small samples in store can be provided for free. Customized samples will take about 2-3days.
Q6: What's your payment terms ?
A6: By T/T(30% deposit in advance, balance 70% before shipment),, L/C after sight 30~120 days. Western Union, Paypal, or Trade Online.
Suppliers with verified business licenses
Audited Supplier 
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