Large diameter thick wall steel pipe 1)Standard: AISI,ASTM,GB,DIN,JIS 2)Thickness 0.5mm---80mm 3)Diameter 10mm-1000mm Large diameter thick wall steel pipe Seamless steel pipes 1)Standard: AISI,ASTM,GB,DIN,JIS 2)Length:6000mm 3)Thickness 0.5mm---80mm 4)Diameter 10mm-1000mmSeamless steel pipes1) Standard: AISI,ASTM,GB,DIN,JIS2) Length:6000mm3) Thickness: 0.5mm---80mm4) Diameter: 10mm—1000mm5) ...