... ring to cool HDPE(PP, ABS)material, which can fit for the requirement of HDPE(PP, ABS). And ... pipe production line, special design vacuum sizing tank can ensure the stability of size and roundness, Speed ... . 3. Diameter range is 16mm-800mm, which can be changed into inch standard to meet clients specialThe ... ring to cool PE(PP, ABS)material, which can fit for the requirement of PE(PP, ABS). And ...