Roc-Master - one of the most experienced professional manufacturer of CRA CLAD pipes, flanges, fittings and 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 Haiyan was started in May 2013 with an area of 3,800 m2 and is located in Haiyan, Zhejiang Province, nearby Hangzhou Bay Bridge and the G15 Shenhai Highway. The laboratory, measuring room and office covers 200 m2 in total. There are more than 40 people in production, technical, quality control and management. The factory has passed ISO 9001 and PED 97/23/EC 4.3authentication. Our major products are stud bolts, hex head bolts and screws, socket head cap/setscrews, welded stud, U bolts, clamps and sliding pipe support etc., which are mainly used in the oil &gas industries, offshore platforms, FPSO, petrochemical plants, long distance owlines, bridge and steel structure, valves, equipments and pressure vessels etc. The solutions for corrosion resistance coating we use are PTFE, Xylan, Metal Ceramic, sheradizing, Zn-Ni plating and FBE etc. We have rich experience in special nickel base alloy fasteners, especially the precipitation hardening and high-temperature stainless steel A453 Gr.660 and nickel base alloy Incoloy718, Monel400, Inconel600, Inconel625, Hastelloy-X N06002 etc. The facility is equipped with more than 50 production equipment, including blanking machines, thread rolling machines, automatic chamfering machines, tapping units, lathes, punching machines and marking equipment, hot induction U-bolt bending machines, 310 ton hot forging machine, heat treatment furnace for quenching and tempering with 9 thermocouples in accordance with API 6A, special treatment equipment for sheradizing, oil curtain spray booth using state of art DeVilbiss air spray guns and PID temperature controlled curing furnace etc. We have a regular stock of around 300 tons of B7, L7, A453 Gr.660、Incoloy 718 raw material for 1/2”~4” bolts, 100 tons of A194 Gr.2H, Gr.4, Gr.7 nuts of all sizes, 3 tons of various Whitford coating material-Xylar2，Xylan1014、1070、1424、1052、4090etc. The annual production capacity for fasteners is more than 3,000 tons, for coating 3000 tons, and for sheradizing 1000 tons. Roc-Master HaiYan is a Whitford worldwide QAC (Quality approved Coater), adopting Zinc plating, Zinc Phosphate, Manganese Phosphate, Zn-Ni plating, Whitford Xylar2, Sheradizing for base coat; adopting coating material Poly uoride compounds of Whitford 1000 series, 1400 series for top coat. Zinc plating + Xylan 1424 has passed over 2,000 hours salt spray test; Zn-Ni plating over 5,000 hours; Zn-Ni+Xylan over 5,000 hours and RocCote Sheradizing over 5000 hours.