API 5CT J55 casing is a grade of carbon steel pipe manufactured process in accordance with the American Petroleum Institute Specification 5CT, specifically designed for use as casing in oil and gas wells. It is one of the most widely used casing grades for shallow to medium-depth wells, offering an optimal balance of mechanical properties, weldability, and cost-effectiveness.
Key Features:
1) Lower cost compared to higher grades (N80, L80, P110)
2) Widely stocked by manufacturers and distributors globally
3) Suitable for multiple casing applications in shallow to medium-depth wells
4) Not classified as a sour service grade, not suitable for environments containing H₂S
OCTG products specifications
Oilfield Tubular Products | Standard | Grade |
Drill Pipe | API 5DP | E75; SS75; X95; SS95; G105; SS105; S135; V150 |
Casing | Grade | 40 | 55 | 80 | 90 | 95 | 110 | 125 | 140 | 150 |
API 5CT | H40 | J55; K55 | N80-1
N80Q
L80-1
L80-9Cr
L80-13Cr | C90 | R95
T95 | C110
P110 | Q125 | | |
Non-API | | | 80T/80TT
80S/80SS
80TS/80TSS
80H
80-1Cr
80-3Cr
80-13Cr
80S/80SS-3Cr | 90T/90TT
90S/90SS
90TS/90TSS
90H
90-3Cr
90S/90SS-3Cr | 95T/90TT
95S/95SS
95TS/95TSS
95-3Cr
95S/95SS-3Cr | 110T/110TT
110S/110SS
110TS/110TSS
110H
110-3Cr
110S-13Cr
110V | 125T/125TT
125H
125V | 140V | 150V |
Tubing | Grade | 40 | 55 | 80 | 90 | 95 | 110 | 125 | 140 | 150 |
API 5CT | H40 | J55; K55 | N80-1
N80Q
L80-1
L80-9Cr
L80-13Cr | C90 | R95
T95 | C110
P110 | Q125 | | |
Non-API | | | 80S/80SS
80H
80-1Cr
80-3Cr
80-13Cr
80S/80SS-3Cr | 90S/90SS
90H
90-3Cr
90S/90SS-3Cr | 95S/95SS
95-3Cr
95S/95SS-3Cr | 110S/110SS
110H
110-3Cr
110S-13Cr | 125H | | |
General information:
Standard: API 5CT
Grade: J55, K55, N80-1, N80Q, L80-1, L80-9Cr, L80-13Cr, C90, T95, C110, P110, Q125
API 5CT tubing: Seamless and welded, OD: 26.7 mm (1.05") to 114.3 mm (4.5"); WT: 3.18-16 mm; L: R1 / R2 / R3
API 5CT casing: Seamless and welded, OD: 114.3 mm (4-1/2") to 508 mm (20"); WT: 5.21-22.22 mm; L: R1 / R2 / R3
End Thread Type: ST&C (Short Thread), LT&C (Long Thread), and Buttress, NU (Non-upset), EU (External upset), IJ (Integral Joint), Premium connections
Available Coating: coating and color brands according to API 5CT
Package: Plastic caps on both ends to protect threads, hexagonal bundled with steel strips, each bundle will not exceed 3tons.
Shipment: Land transportation by truck or train, sea transportation by container shipment or bulk vessel.
Hebei K-Steel Pipe Industry Our advantage:
Flexible Project Customization
We provide tailored manufacturing solutions to meet diverse project requirements, including customized outer diameter, wall thickness, and length specifications. In addition, we offer precision end preparation and a full range of anti-corrosion coating options to ensure optimal performance in various operating environments. This flexibility enables us to deliver line pipe solutions that align seamlessly with your technical and application needs.
Fast & Reliable Lead Time
With strong mill partnerships and readily available inventory resources, we are able to shorten production cycles and respond quickly to urgent project demands. Our integrated supply network ensures stable material availability, efficient scheduling, and on-time delivery — helping clients keep their projects on track without delay.
Advanced Technical & Quality Assurance
Equipped with our own metallurgical laboratories and supported by trusted third-party inspection agencies, we ensure every line pipe meets international standards and project specifications. Comprehensive testing and verification guarantee consistent mechanical properties, chemical composition, and coating integrity, providing clients with reliable, high-quality pipeline solutions.
Rapid Delivery & Complete Logistics
Leveraging fast supply capabilities and a well-established logistics network, we ensure timely delivery of line pipes to any project location. Our streamlined transportation and warehousing system minimize lead time, helping clients maintain smooth operations and meet critical project schedules.
