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    What's the difference between seamless and straight elbow?

    What's the difference between seamless elbow and straight elbow?
    Two layers of meaning, one, is a pure seamless product, is a product made with seamless tubes. Secondly, it is done by welding and the weld is rubbed away. The industry calls it fake seamless. Implement GB/T12459-2005
    Then there is the bending of the plate. That is the upper weld and the lower one, and the implementation standard is GB/ t13401-2005.Our company produces cold pushing elbow machinemedium frequency heating elbow machine and other series of machine productions.