API 5CT Oil Pipe Seamless Steel N80 L80 P110 J55 K55 Oil Casing Pipe in Steel Pipes
Steel grade: J55, K55, N80, L80, C90, T95, P110, Q125
Size: 4 1/2”~20” for Seamless Casing
Size: 1.05''~4 1/2'' for Seamless Tubing
Length: R1/R2/R3
Dimensional tolerances:
Types of steel tubes | Outer diameter | Wall thickness | |
Cold-rolled tubes | Tube sizes(mm) | Tolerances(mm) | Tolerances(mm) |
<114.3 | ±0.79 | -12.5% | |
≥114.3 | -0.5%, +1% | ||
Mechanical properties:
Standard | Models of steel tubes | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) | Hardness |
API SPEC 5CT | J55 | ≥517 | 379~552 | check the table | ≤241HB |
K55 | ≥517 | ≥655 | |||
N80 | ≥689 | 552~758 | |||
L80(13Cr) | ≥655 | 552~655 | |||
P110 | ≥862 | 758~965 |
Chemical Composition:
Standard | Models of steel tubes | Chemical compositions (%) | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Als | ||
API SPEC 5CT | J55K55 (37Mn5) | 0.34~ 0.39 | 0.2~ 0.35 | 1.25~ 1.5 | ≤0.02 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.20 |
|
| ≤0.02 |
N80 (36 Mn2V) | 0.34~ 0.38 | 0.2~ 0.35 | 1.45~ 1.7 | ≤0.02 | ≤0.015 | ≤0.15 |
|
|
| 0.11~ 0.16 | ≤0.02 | |
L80 (13Cr) | 0.15~ 0.22 | ≤1.0 | 0.25~ 1.0 | ≤0.02 | ≤0.010 | 12.0~ 14.0 | ≤0.20 | ≤0.20 |
|
| ≤0.02 | |
P110 (30CrMo) | 0.26~ 0.35 | 0.17~ 0.37 | 0.40~ 0.7 | ≤0.02 | ≤0.010 | 0.8~1.1 | ≤0.20 | ≤0.20 | 0.15~ 0.25 | ≤0.08 | ≤0.02 | |
Note: Also we can supply you pup joint and coupling (coupling stock and coupling blank)for tubing and Casing, as well as for weld pipe.
| Packaging Detail: | EXPORT STANDARD SEAWORTHY PACKING |

Advanced equipment and techniques
Long-term cooperative relationships with more than a hundred famous and large manufacturers in China
High quality products and the best services to meet the strict needs of our customers
The business philosophy of "people-oriented, customer first and reliability first"
Successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia
Shaanxi Senwell Drilling Equipment Co., Ltd. (SENWELL) is a comprehensive corporation, of which the business scope is manufacture, trade and sale.
Our company is engaged in designing, researching & developing, testing and manufacturing oilfield equipment and providing relative services.
Our business covers drilling stem tools, fishing tools,c oring tools, downhole tools, oil mining equipment, drill equipment, well control systems and pipes.
We welcome new and old customers from all over the world to contact us for future business relationships and achieving mutual success! To benefit from our strong OEM/ODM capabilities and considerate services, contact us today. We believe you will be better with our support!
FAQ (Frequently Asked Questions)
Please get back to my email address or call me:
You can provide us the following information.
Size,
Outer diameter,
Connection,
Length,
Quantity
You may have any questions, please ask us freely.
Any inquiry is welcomed here.
1) payment
We can send you our bank account information after the contract is made. By T/T , L/C etc.
2) What is the MOQ?
Small trial order is acceptable.
3) Quality?
Yes, design and manufacture more strictly than API.
4) How to transport product ?
By sea from Shanghai port.
If you have any question, please let me know, I will contact you as soon as possible.
Send Inquiry to This Supplier
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