Tongyu is a famous listed company in heavy duty machinery manufacturing field.  
We have obtained certificates of ISO 8001, ISO 14001 OHSAS 18001 and certificates of shipping classification society, including BV, CCS, DNV, ABS, LR, GL, KR, NK.
We are committed to manufacturing and supplying large steel forgings and castings  with high quality and favorable price, e.g. main shaft /low speed shaft/rotor shaft and hub used in the wind power generator, centrifugal ductile cast iron pipe mould, shaft for hydraulic generator/ large industrial blower/ship , roller, cylinder forging, forged steel round bars and blocks and so on. Through over 20 year?s efforts, Tongyu has realized a longstanding and mutually beneficial cooperation with lots of international famous enterprises. It will open a new door for you in the intense competitive market if you choose Tongyu as your supplier.