... Nr. 2.4375Standard Specification for Pipe & Tube: BS3074NA18, DIN 17751 Chemical compositions: ... Hydraulic, Etc. Other: Hydraulic Tube, Horn Tube, Capillary Tube, Boiler Tube, Precision Tube, IBR TubeEnd: Plain end Beveled ... method: Cold drawn, Cold rollingFinishing: Heat treatment, annealed, acid washing, manual and mechanical polishedChaowei advantages:- Good quality products. - Fast production ...