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.