... cast tubes in low price with high quality.Features:1.Heat resisting HK centrifugal casting tube 2.Size: OD: 50 ... ,special alloy products and forgings, and it own complete heat treatment equipment,inspection equipment and impeccable quality control system. ... -term cooperation and develop together.China Special AlloyShanghai ZENT Industrial Co.,LtdRoom 2302,No.729. Pujian Road . Pudong .Shanghai , ...