What is API 5CT L80 Steel Casing and Tubing?
API 5CT L80 oil well casing and tubing steel pipes include grades L80-1, L80 9Cr (Cr 8%-10%), L80 13Cr (Cr 12%-14%), L80, minimum tensile strength 655 Mpa, yield strength 552 Mpa to 655 Mpa, it is a medium strength grade higher than J55/K55,L80 pipes have been used in oil well establishment, drilling and producinging oil and gas industries.Request a Professional Solution for API 5CT L80 Casing Today.
API 5CT L80 OCTG Casing tube Specification
Standards: API 5CT
Grades: L80
Type：L80-1, L80 9Cr, L80 13Cr
Production Specification Level: PSL 1, PSL 2, PSL 3
Outer Diameter: 114mm-508mm
Length: R1, R2, R3
API 5CT L80 casing pipes and tubes Metallurgical Classification
L80 is classified into three categories based on composition and corrosion resistance. The primary differences lie in the Chromium content and the resistance to Carbon Dioxide and Hydrogen Sulfide.
| Type | Composition | Core Features | Typical Operating Conditions |
| L80-1 | Carbon Steel–Manganese Steel, Cr ≈ 0 | Resistant to mild H₂S (NACE); weak resistance to CO₂. | Weakly acidic gas wells, H₂S-bearing formations |
| L80 9Cr | 8–10%Cr | Good CO₂ resistance; moderate H₂S resistance. | Medium-CO₂ Environment, Steam Huff-and-Puff Well |
| L80 13Cr | 12–14%Cr | Excellent CO₂ resistance; limited resistance to H₂S. | High-CO₂/Low-H₂S Wells, Condensate Gas Wells |
API 5CT L80 steel casing and tubing chemical composition
| Element | L80‑1 | L80 9Cr | L80 13Cr |
| C | ≤0.43 | ≤0.15 | ≤0.08 |
| Si | ≤0.45 | ≤1.00 | ≤1.00 |
| Mn | ≤1.90 | ≤0.50 | ≤0.50 |
| P | ≤0.030 | ≤0.020 | ≤0.020 |
| S | ≤0.030 | ≤0.010 | ≤0.010 |
| Cr | - | 8.0–10.0 | 12.0–14.0 |
| Ni | ≤0.25 | ≤0.50 | ≤1.00 |
| Mo | ≤0.35 | 0.8–1.1 | 0.5–1.0 |
API 5CT L80 oilfiled casing pipes Mechanical Properties
| Property | Data |
| Yield Strength | 552–655 MPa |
| Tensile Strength | ≥655 MPa |
| Hardness | ≤23 HRC(≤255 HBW) |
| Elongation | ≥18% |
| Impact Toughness | V-notch, ≥27 J at 0°C (Transverse) |
API 5CT L80 Oil well casing steel pipe identification of color
| steel grade | Pipe Body Color Band | Coupling Color |
| L80-1 | One Red band +One Brown band | Entirely Red with a Brown band |
| L80 9Cr | One Red + One Brown+ One Yellow | Red coupling with Brown & Yellow bands |
| L80 13Cr | One Red + One Brown +One Blue | Red coupling with Brown & Blue bands |
API 5CT L80 casing pipe Length range
According to the latest publicly available information, the length range for API 5CT Grade L80 oil casing adheres to the standard length subdivision provisions for casing joints specified in API Spec 5CT, as follows:
R1: 4.88 to 7.62 m
R2: 7.62 to 10.36 m
R3: 10.36 to 14.63 m
GNEE API 5CT L80 Casing and tubing Pipe certifications
GNEE API 5CT L80 Oil Well Casing Pipe process line
GNEE is an outstanding company of API 5CT L80 pipe, which are correctlytried by our accomplished experts on different parameters. You can purchasepremium API 5CT L80 casing pipes in sensible expense form us.
If you want to know more details about our API 5CT L80 casing pipe, click here.
FAQ
1.How many steel grades are there in API 5CT? Where does L80 fall?
API 5CT comprises 4 groups and 19 grades. L80 belongs to group 2 and has medium strength. Its minimum yield strength is 552 MPa-achieving an optimal balance between strength and cost. It is one of the most widely used grades in oilfield applications.
2.How should L80 bushings be packaged?
The packaging requirements for L80 bushings are very strict. The bushings must be bundled with steel wire or steel tape. Protective rings (thread protectors) must be screwed into the exposed threads of each bushing and fitting to prevent thread damage during transportation and storage.
3.What is the difference between L80 tubing and L80 casing?
Casing is used for cementing and supporting the wellbore. It has a wide range of outer diameters and three lengths of fittings. Tubing is used for oil and gas production. It has a smaller outer diameter and end shapes including unthickened, thickened or integral fittings. It usually does not have fittings (only some thickened tubing has fittings). The length is generally between 6.10 meters and 9.75 meters.
