... Steel Pipe 1) Size:1/8'' to 24'' 2) Standard:APL 5L,API 5CT,ASTM A106,ASTM A53,EN CARBON STEEL SEAMLESS ... .NK1)Material: Carbon Steel Pipes2)Size: 1/2"-48"3)Standard: ASTM,DIN,JIS GBCARBON STEEL SEAMLESS PIPES:1) Pipe Diameter ... 52 , ST374) Standards of Steel Pipe: ASTM A106 , ASTM 53 , API 5L and etc.5) Surface of Steel Pipe oiled or ...