• API 5CT N80 OCTG steel tubing pipes sizes for petroleum industry

API 5CT is the technical specification for OCTG tubing pipes which are used in the petroleum industry. API 5CT N80 includes N80-1 and N80-Q types. Tubing pipes sizes are between 60.3mm( 2 3/8’’) and 114.3 mm( 4 1/2’’).


Standard API 5CT latest edition
Grade H40, J55, N80-1, N80-Q, R95, L80-1, C90, T95, P110
Outer Diameter 60.3 – 114.3 mm (from 2-3/8’’ to 4-1/2’’ )
Length R1, R2, R3
Type EUE, NU
Packing Thread protector, black paint and bundling
Section Shape Round
Place of Origin China
Technique Seamless hot rolled
Application Oil and Gas field
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,


2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”)

Khorgos port(Пограничный пункт “Хоргос”)

→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)

Erlianhot port→Mongolia(Train and Truck)

Manchuria port→Russia(Train and Truck)

Chemical Composition(%)
Grade C Mn Mo Cr Ni Cu P S Si
N80-1/N80Q 0.03 0.03
Mechanical properties
Grade Total elongation under load(%) Yield strength(Mpa) Tensile strength(Mpa) Hardness (HRC) Hardness (HBW)
N80-1/N80Q 0.5/0.5 552~758 689

Inquiry form