With more than 25 years of history, Jiangsu Dongjin Mechanical Manufacturing Co., Ltd. is a leading manufacturer of all kinds expansion joint, flexible metal hoses, dampers, mechanical seals an pipe fittings, etc...In China. We are capable total in-house design, manufacturing & testing. We are a branch company of Jiangsu Dongjin Group Which is a large scale enterprise specialized in producing stainless steel expansion joint, steel expansion joint, non-metal expansion joint and flexibe etal hoses. The products are widely used in shipbuilding, power plant, cement making, steel making, petrochemical, etc. And our company was appointed as qualified supplier for many ministries of China, such as Ministry of Metallurgy, Ministry of Electricity, Ministry of Chemical, and so on. Our company has all necessary certificates, such as IS9001: 2000, Manufacturing License for Pressure Vessels, Manufacturing License for Pipe Accessories, etc. The diameter of the expansion joints can be largest in China. The diameter is different in the range of DN50-DN10800. The rectangular expansion joints can be as large as you can imagine.