API 5CT specifies the manufacture of OCTG pipes and couplings used in oilfield. Our company can produce different types of  casing pipes, tubing pipes, couplings for casing and tubing pipes, and the raw steel pipes used for OCTG tubing pipes.

    Specification

    Standard API 5CT latest edition
    Steel Grade/Material H40/J55/L80/N80-1/N80Q/L80-13Cr/R95/C90/T95/C110/P110/Q125
    Outer Diameter(OD) 1.9”-4.5”(48.26mm-114.3mm)
    Wall Thickness(WT) 0.125”-0.63”(3.18mm-16mm)
    Length R1/R2/R3
    Packing Thread protector,black paint and bundling
    Type of thread STC/LTC/BTC/OEM
    Section Shape Round
    Technique Seamless hot rolled
    Application Used to make OCTG 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”)
    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 —
    R95 ≤0.45ᶜ ≤1.9 ≤0.03 ≤0.03 —
    L80 ≤0.43ᵃ ≤1.9 ≤0.03 ≤0.03 —
    L80-1 ≤0.15 0.30~0.60 0.90~1.10 8.00~10.0 — — ≤0.03 ≤0.03 ≤0.45
    L80-13Cr 0.15~0.22 0.25~1.00 12.0~14.0 ≤0.25 ≤0.35 ≤0.03 ≤0.03 ≤0.45
    C90 ≤0.35 ≤1.20 0.25ᵇ~0.85 ≤1.50 ≤0.5 ≤0.25 ≤0.02 ≤0.01 ≤1
    T95 ≤0.35 ≤1.20 0.25ᵇ~0.85 0.40~1.50 ≤0.5 ≤0.25 ≤0.02 ≤0.01 ≤1
    C110 ≤0.35 ≤1.20 0.25~1.00 0.40~0.15 ≤0.99 — ≤0.02 ≤0.01 —
    P110 ≤0.99 — ≤0.02 ≤0.01 —
    Q125 ≤0.35 1.35 ≤0.85 ≤1.50 ≤0.99 — ≤0.02 ≤0.005 —
    Mechanical properties
    Grade Total elongation under load（%） Yield strength（Mpa） Tensile strength（Mpa） Hardness （HRC） Hardness （HBW）
    H40 0.5 276~552 414 — —
    J55 0.5 379~552 517 — —
    K55 0.5 379~552 655 — —
    N80-1/N80Q 0.5/0.5 552~758 689 — —
    R95 0.5 655 724 — —
    L80 0.5 552 655 23 241
    L80-1/L80-9Cr 0.5 552 655 23 241
    L80-13Cr 0.5 552 655 23 241
    C90 0.5 621 689 25.4 255
    T95 0.5 655 724 25.4 255
    C110 0.7 758 793 30 286
    P110 0.6 758 862 — —
    Q125 0.65 862 931 — —

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