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ZhenHong preforming process is mainly for produce the blanks of hollow balls and welded (hollow) balls, sizes 11/2” to 24” (DN40~600), class 150Lb to 600Lb (PN10~100), from steel sheet / plate to welded pipe to hollow ball and weld ball, we produce from raw material and have full control of the whole processes, then the quality, capacity, delivery and cost are easily managed by ourselves. The workflows are as below:





Plate Cutting


Pipe Reeling


Pipe Welding





Ball Pressing


Hollow Ball Roughcast


End Welding





Wedge Welding


Welded Hollow Ball Roughcast