Seamless API 5CT Steel Casing
Standard:API SPEC 5CT Standard.
Use: Seamless steel tubes for oil casing and tubing in oil and gas well. Casing pipe is the steel pipe to support the wall of oil and gas wells, divided into surface casing, protective casing and production casing.
Steel grade: J55, K55, N80, L80, C90, T95, P110, Q125
Size: 4 1/2”~20” for Seamless Casing
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.
Standard exporting package by Senwell or according to customers' request
Shipping: China main port (Tianjin & Shanghai for selection)
Our Services
1.Advanced equipment and techniques
2. Customized design
3.High quality products and the best services to meet the strict needs of our customers
4Our business philosophy of "people-oriented, customer first and reliability first"
5. Long-term cooperative relationships with more than a hundred famous and large manufacturers in China
6. Successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia
7.Warranty
SENWELL's main products cover 220 types and more than 1000 specifications presently. Our business covers non-magnetic products, drilling stem tools, fishing tools, jarring tools, coring tools, cementing tools, milling tools, well head tools, accessory tools, downhole tools, oil mining equipment, drill equipment, well control systems and pipes.
Today, with strong technology and profuse experience, SENWELL not only provides a comprehensive range of oilfield tools, but also provides tools for machinery industry and has decades of production experience. Main products are sand casting, investment casting, forging, centrifugal casting and machining equipment.
We have a great deal of outstanding and seasoned employees. Relying on advanced equipment and techniques, with the scientific management theory and spirit of "seriously dealing with matters relating to works", we have established long-term cooperative relationships with more than a hundred famous and large manufacturers in China. Our company creates a steady-going and reliable environment for our product research, development and sale.
We are based on the tenet of "providing consistent high quality products and the best services to meet the strict needs of our customers; to create value for our customers and provide our customers with a return on their investment" and the business philosophy of "people-oriented, customer first and reliability first". Our products have been successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia. In the international market, we have acquired an excellent reputation among the clients.
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!


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