Ningbo Zhehua Heavy steel pipe manufacturering Co.,Ltd is branch company of Sutor Group, established in 2004, registered capital of RMB 60 Million with 80,000 square-meter site. the company is specializing in manufacturering submerged arc welded steel pipes with OD range from 219~3420mm WT range from 5~60 mm. the annual production ability is  more than 500,000 tons. widely used in water transmission pressure pipeline, oil and gas transmission pipeline, piling pipe of large size bridge, ports, airports, gym-stadium, station and municipal construction etc.
       ASTM, API 5L, DIN,EN,GBT, JIS, SY/T etc standard, and many differnent materials.