... manufacture of Seamless steel pipes forautomotive axle housing[ASTM 1345,ASTM 5140,41Gr4] API 5CT/API 5L/ISO9001 manufacture ... boiler pipesSeamless low and medium pressure boiler pipes Technical standard:1) ASTM A3352) ASTM 2133) API 5L4)API 5CT5) EN 102106) ... ISO 9001 Grades:1>J55,K55,N80,P110,L802>ASTM A106 GR.A ,A106 Gr.B,A53 Gr. ... A,A53 Gr.B,ASTM A179-C,A214-C,A192,A226,A315-B,A178 ...