Hunan Great Steel Pipe Co., Ltd. specializes in manufacturing steel pipes since 1993. As one of leading manufacturers of steel pipe throughout China, our pipes can be produced with international standards as API.DIN.ASTM.ISO.BS.ANSI.JIS.etc 1. Seamless steel pipe: OD: 13.72 – 914mm , wall thickness: 1.25mm to 50mm 2. ERW steel pipe: OD: 21.34 – 610mm, wall thickness: max 26.5mm 3. SSAW steel pipe:OD: 219 – 3120mm , wall thickness: 3mm to 25mm 4. LSAW steel pipe: OD: 406.4 –1625.6mm , wall thickness: max 65mm 5.Stainless steel pipe: OD: 6.0 – 830mm, wall thickness: 1.0mm to 24mm 6.Hollow section steel pipe:Square/Retangular/Round No matter what the quantity you inquired, we will take it carefully and give you the most reasonable price and professional service in time. Looking forward to hearing from you! Thank you in advance!