Roc-Master - one of the most experienced professional manufacturer of CRA CLAD pipes, flanges, fittingsand bends as well as forged flanges in all materials, special subsea forgings, and all type of fasteners, coated bolts & nuts, Roc-Master is also a supplier who provides Weld Overlay, precision machining services, as well as prefabrication (spooling) for clad and nonclad components. Furthermore the company is an OVERALL SUPPLIER for the total packages used in the onshore, offshore, oil & gas industries, chemical and petrochemical industries. Roc-Master was founded in 1997. We have four production facilities located in the cities of Shanghai, Suzhou, JiAn and Haiyan, covering a total area of around 40,000 m2 and having total over 260 national and overseas employees. We have excellent professional teams which include sixteen senior and junior engineers with good experience in commercial, engineering, and management; Our chief heat treatment engineer, bolting products chief engineer, piping material consultant and European clad bend consultant are all well known experts in their field and have more than 40 years experience; 70% of our staff have college and higher up to Master degree.