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  • Detailed treatment of thick-walled steel pipes before use
    Detailed treatment of thick-walled steel pipes before use
    2022-04-14

    The selection of welding method of the thick-walled steel pipe should be selected according to the material and wall thickness of the thick-walled steel pipe. Because different welding methods have different arc heat and arc force, different welding methods have different characteristics. For exampl

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  • Inspection standard and welding control problem of thick-walled steel pipe
    Inspection standard and welding control problem of thick-walled steel pipe
    2022-04-11

    Through observation, it is not difficult to find that whenever thick-walled steel pipes, thermally expanded pipes, etc. are produced, the pipes obtained by thick-wall welding on high-frequency welding equipment with strip steel as the production material are called thick-walled steel pipes. Among th

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  • What are the heat treatment methods for spiral steel pipes
    What are the heat treatment methods for spiral steel pipes
    2022-04-07

    1. Thermomechanical treatmentHigh-temperature thermomechanical treatment can improve the yield ratio and elastic limit of the spiral steel pipe. Improve the comprehensive mechanical properties, fatigue properties, and stress relaxation properties of spiral steel pipes. Reducing the ductile-brittle t

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  • Packaging and storage of oil casing
    Packaging and storage of oil casing
    2022-03-30

    According to American Petroleum Institute standard APISPEC5CT1988 1st edition, petroleum casing steel grades H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P -110, Q-125 a total of 10 kinds. Oil casing shall be supplied with threads and couplings, or in any of the following pipe end forms: plain en

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