API 5CT steel couplings, also known as OCTG steel couplings, used to connect petroleum casing and tubing, is usually manufactured in seamless type, and its material grade is same with the pipe body of casing and tubing (API 5CT K55/J55, N80, L80, P110 etc), same PSL or providing higher grades than requested. Tubing pipes contains two types :EUE and NU tubing pipes, and each type has its suitable couplings.
Specification
Standard | API 5CT latest edition | |||||||
Grade | H40, J55, N80-1, N80-Q, R95, L80-1, C90, T95, P110 | |||||||
Outer Diameter | 26.67mm – 114.3 mm (from 1.050” to 4.5’’ ) | |||||||
Type | EUE, NU | |||||||
Packing | Thread protector,black paint and bundling | |||||||
Section Shape | Round | |||||||
Place of Origin | China | |||||||
Technique | Seamless hot rolled | |||||||
Application | Connecting casing pipes and tubing pipes | |||||||
Place of Origin | China | |||||||
MOQ | 1 ton | |||||||
Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
Dimension, tolerance and weight of Coupling for EUE tubing | ||||||||||
Code name | Specification | OD tolerance |
Minimum length
In. |
Boring diameter Q In. |
Bearing surface width of Standard coupling
b |
Diameter of Maximum bearing surface | Weight Lb |
|||
OD Inches |
Standard coupling In. | Special clearance In. |
Standard coupling with Special chamfer In. |
Special clearance In. |
Standard coupling In. | Special clearance In. |
||||
1.050 | 1.050 | 1.660 | — | 3 1/4 | 1.378 | 3/32 | 1.488 | — | 0.84 | — |
1.315 | 1.315 | 1.900 | — | 3 1/2 | 1.531 | 3/32 | 1.684 | — | 1.26 | — |
1.660 | 1.660 | 2.200 | — | 3 3/4 | 1.875 | 1/8 | 2.006 | — | 1.49 | — |
1.900 | 1.900 | 2.500 | — | 3 7/8 | 2.156 | 1/8 | 2.297 | — | 1.85 | — |
2-3/8 | 2.375 | 3.063 | 2.910 | 4 7/8 | 2.656 | 5/32 | 2.828 | 2.752 | 3.43 | 2.35 |
2-7/8 | 2.875 | 3.668 | 3.460 | 5 1/4 | 3.156 | 7/32 | 3.381 | 3.277 | 5.30 | 3.42 |
3-1/2 | 3.500 | 4.500 | 4.180 | 5 3/4 | 3.813 | 1/4 | 4.125 | 4 | 9.03 | 5.24 |
4 | 4.000 | 5.000 | — | 6 | 4.313 | 1/4 | 4.625 | — | 10.63 | — |
4-1/2 | 4.500 | 5.563 | — | 6 1/4 | 4.813 | 1/4 | 5.156 | — | 13.33 | — |