... 4.Automatic tracking the arc length 5.ISO9001,CQC China best quality KHGK Orbit TIG welding machine About us: ... Quenching Medium Performance Analyzers, Tube end facing machines in China with experience of 19 years, manufacturing according to the ... diameter from16mm-230mm tube-pipe,tube-elbow, the tube-flanges,Main Technical Specifications Tube-tube WeldheadKHGK16-40AKHGK36-90AKHGK70-160AKHGK140- ...