A special attention is given to produce threaded fasteners for the romanian nuclear power industry, as well as for the chemical and oil industry. Since 1986 Subex has been certified by CNCAN to manufacture nuclear threaded fasteners.
There is a „Quality Assurance System” acc. to the CZAZ2993 canadian norms and NRAQ 04/93 romanian norms, applied to the nuclear power plant fasteners manufacturing.
The products for the chemical and petrochemical industry are: standard studs, special threaded rods, hexagon socket, head cap screws, hexagon nuts manufactured by cold and hot forging with rolled – metric or inch thread.
These products are generally manufactured from carbon steel, allay steel, meeting the special requirements of STAS11290, DIN17240, DIN1654, ASTMA193, ASTMA194, etc.
Special tests are requiring as strength at high (+500℃) and low (-70℃) temperatures, strain crevice corrosion strength, embitterment strength, crevice control. The products are available by protection: browning, phosphating and zinc plating for the length less than 200mm.