... ,API5L,API5CT,DIN,JIS and so on 4.Out Diameter:21.3mm&457mm (1/2”-22”) 5.Wall Thickness:2mm-70mm 6 ... .Grade:10#,20#,45#,16Mn,27SiMn,Q235,ST42,ST52,, A106-a,A106-b,and so on ... .Technique:Seamless,welded 9.Usage:Low and middle pressure fluid transportation pipeline, Casing Tube, Boiler Pipe, Pertroleunm and natural gas industry Chemistry industry ...