We are Tongyu Heavy industry Co,Ltd,mainly producing the main shafts for wind turbine and pipe mould , large forgings and  castings etc.our company has now become the largest production base for manufacturing main shaft for wind turbine and  the largest base for ductile iron cast pipe mould.The company is able to provide 1-5class large forgings,castings and key parts for metallurgy,mining,hydroelectric power, thermal power,wind power, nuclear power station,shipbuilding,petrolleum chemical industry,heavy machinery,marine engineering and other industries.

       our company has now certificated by the system of international quality cerification ISO9001, the system of environmental management system ISO14001,the system of occupation health safety management OHSAS18001,and military quality management system certification.Tongyu also gained the American ASME nucler grade MO certiificate,boiler and pressure vessel forging safety certificate of registration,pressure piping components manufacturing license.It has passed eight countries shipping classification certificates including CCS, ABS, BV,GL,NK,DNV,LR,and KR.