... ,smooth surface 3,uniform wall thickness Precise seamless steel pipe We can supply tubing & casing manufactured according to API ... Specification 5CT with the following speciication: Manufacturing Method precise seamless steel pipe casing&tubingSize (OD)Casing:4-1/2”,5”,5 ... B,X42,X46,X52ASTM A53ASTM A106B Linzhou Fengbao,a professional seamless pipe manufacturer, a non-stop service provider!If you don' ...