Product Name | API 5CT Oil Well Casing tubing Pipe steel pipe |
Material | Carbon Steel/ Steel Coil |
Color | Black Painting or bare pipe |
Standard | API 5CT/ GOST/ GB/ EM-18-00/05 |
Grade | H40/ J55/ K55/ N80 / N80Q /R95 /P110 /Q125... |
Dimension | OD: 114.3-508mm WT: 5.21-16.13mm |
Thread | STC, LTC, BTC, special clearance, XC,EUE,EU,DWG,ECT |
Used | Used as the Structural Retainer for the Walls of Oil, Gas Wells |
Ends | BTC,JEF BEAR, STC, LTC,Customerize |
Lengths:
Oil Casing | Range 1 | Range 2 | Range 3 |
4.88~7.62 | 7.62~10.36 | 10.36~14.63 |

Group | Grade | Type | Total elongation under load % | Yield strength Mpa | Tensile strength min MPa | Hardness max | ||
min | max | HRC | HBW | |||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
1 | 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 | - | - | |
2 | 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 | 1?2 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | |
C95 | - | 0.5 | 655 | 758 | 724 | - | - | |
T95 | 1?2 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | |
3 | P110 | - | 0.6 | 758 | 965 | 862 | - | - |
4 | Q125 | All | 0.65 | 862 | 1034 | 931 | - | - |
Tube Finishing Process:

Couplings are short lengths of pipe used to connect 2 joints of tubing or casing. They come with painted color codes on their external surface to indicate their grades. Standard:API Spec 5CT and 5B Tread types: NUE, EUE, STC, LTC, BTC, special clearance, XC,
Standards and Technical Conditions for Supply:API Spec 5CT and 5B
Grade: J55,K55,N80-1,N80Q,L80-1,C90,C95,T95,P110,Q125
Thread types of couplings: NUE, EUE, STC, LTC, BTC, special clearance, XC,
Packing: by carton, wooden case, wooden pallet or customized

Coupling Pipe Grade Identification By Paint Color
Coupling colour code | |||||
Grade | Grade Type | Colour(s) for Coupling | Number andcolour of bands
for product | Picture | |
EntireCoupling | Band(s) | ||||
H40 | None | Same as for pipe | None/black band at the manufacturer's option | ||
J55 Tubing | Bright Green | None | One Bright Green | ||
J55 Casing | Bright Green | One White | One Bright Green | ||
K55 | Bright Green | None | Two Bright Green | ||
M65 | M65Pipe uses L80Type 1Couplings | One Bright GreenOne Blue | |||
N80 | 1 | Red | None | One Red | |
N80 | Q | Red | One Green | One RedOne Bright Green | |
R95 | Brown | None | One Brown | ||
L80 | 1 | Red | One Brown | One RedOne Brown | |
L80 | 9Cr | None | Two Yellow | One Red,One Brown,
Two Yellow | |
L80 | 13Cr | None | One Yellow | One Red,One Brown,
One Yellow | |
C90 | 1 | Purple | None | One Purple | |
T95 | 1 | Silver | None | One Silver | |
C110 | White | Two Brown | One White,Two Brown | ||
P110 | White | None | One White | ||
Q125 | Orange | None | One Orange |
- Standards: API 5CT and 5B J55,K55,N80-1,N80-Q,P110, C95
- Sizes: Tubing Coupling : 2-3/8'' - 4-1/2'' Casing Couping : 4-1/2'' - 20' Length: 2, 3, 4, 6, 8, 10, 12 ft
- Specification range: 2-3/8INCH to 20INCH
- Materials: J55, K55, N80, L80, C90,T95, P110 and Q125
- T&C: EUE, NUE, STC, LTC, BTC and Premium connection
- Type: PIN*PIN, PIN*BOX
- Testing: NDT etc related rules of API 5CT and 5B
- Packing: By bundles, seaworthy packing
- Application: Connecting two oil tubing or casing pipes


The color representative:

Logistc Operation:




The Products from Permanent Steel Manufacturing Co.,Ltd are supplied in accordance with appropriate International Standards as well as Customer Specifications in a large variety of steel grades and dimensions.
Permanent Steel Manufacturing Co.,Ltd on a 250,000 m2 area and has three production units: Foundry, Rolling and Extrusion mills. Permanent Steel Manufacturing Co.,Ltd operates under strict quality, environmental, as well as health and safety management systems, in compliance with ISO 9001, ISO 14001 and OHSAS 18001 standards.


FAQ
Q: Are you trading company or manufacturer?
A: We are a sino-Singapore joint venture belong to Husteel Industry Group.
steel pip
Q: How long is your delivery time?
A: Depends on pipes size and quantity. 7-10 days for stocked steel pipe and 20-40 days for new productions according to quantity.bowl shape stainless steel smoking pipe screens
Q: Do you provide samples? Is it free or extra? 201 Stainless Steel Pipe used for Food and Chemical Industry
A: Yes,we could offer free steel pipe sample for your evaluation. stainless steel pipe fitting
Q: What is your terms of payment? steel pipe
A: 20%+80% T/T or 100% irrevocable L/C at sight, the specific payment should be addressed by further discussion.