... high, medium and low pressure boiler tube, alloy-steel tube, anti-rust pipe and petroleum cracking pipe. ... 20, SCH 30, SCH40, SCH80, and SCH160. Cold drawn seamless steel tube offers better surface quality, external appearance, and ... -high mills are regularly used to produce cold drawn seamless steel pipes, and products produced by three-high ... , plastic capPipe Coating: Black vanish, bare, clear oil