Hunan shinestar steel group specialize in welded pipes for 20 years in china. steel pipe supply maintains a full line of sizes and specifications of - carbon/ alloy seamless steel pipe(od 1/4 inch-30inch w.t 1.25mm to 50mm), -erw/lsaw/dsaw steel pipe (od 1/2inch-52inch w.t 1.65mm to 25mm) -spirally welded steel pipe (219mm to 3120mm .w.t 3mm to 25mm) specifications include api, astm, awwa, din£¬en and others.