adopting & innovating traditional methods on bimetal pipeline, such as Hydromantic, explosion, cold drawing, our new technology -- called “Mechanical Forward spinning pressure heat fusion technology” with automatic production line, obtained patent for invention; (Patent#：ZL 2010 1 0517432.1、 ZL 2009 2 0233533.9、 ZL 2012 2 0645769.5）, achieved international advanced Level.
With the spinning pressure force, plasticity deformation occurs on the inner lined pipe, while elasticity deformation on outer backing pipe; when the force disappears, the inner lined pipe is much tightly attached to outer backing pipe. Excessive volume margin : with constraint and control. (simulated shape technology, Conduct spiral line and spot tracing form, Compounding forming adopting continuously dynamic strain technology)
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