We offer carbon steel pipe, alloy steel pipe, seamless steel tube, welded steel tube, spiral steel ... pipe etc. 1)Material: carbon steel, alloy steel, stainless steel, low alloy steel2)Outer diameter: 15~1200mm3)Thickness: 2.5mm~30mm4)Standard: ASME ... , water conservancy, electric power, boiler, machinery, metallurgy, sanitary construction. offer alloy steel pipes