Ningbo Zhehua Heavy Steel Pipe Manufacturing Co., Ltd. is one of the subsidiary companies of Sutor Group, which is a professional manufacturer of various steel pipes. Our company covers 35000 square meters of area. Established in April 2004, our factory lies in Ningbo Luotuo electrical supply industrial park, close to Beilun Port of China. We mainly manufacture saw steel pipes of DN219~DN3400, with thickness from 6 to 25mm, outfitted with American Lincoln welding machines and 30 x 3,000, 12 x 6,000 and 12 x 2,000 straight seam rolling-pipe machines. Our plant capacity is 200,000MT every year....