The products are widely used in railway, bridge, construction, machinery, metallurgy, military industry, aerospace, automobile and other fields, and the business is extended to the overseas markets of more than 120 countries and regions such as Russia, Dubai, Germany, Japan, Australia, Chile, Peru and South Africa.
Application characteristics of steel
The full name of steel structure bolt is steel structure bolt connection pair, usually not called high strength bolt. Steel structure bolts are mainly used in the construction of industrial and civil buildings, railway bridges, highway bridges, pipeline bridges, tower and mast structures, boiler frames, boiler steel structures, large-span industrial workshops, high-rise civil buildings, various towers, light steel structures, lifting machinery and other steel structures connecting buildings.
Each pair consists of a bolt, a nut and two washers. According to the installation characteristics, steel structure bolts are divided into large hexagon head bolts and torsion shear bolts. The production cost of strength torsional shear bolt joint is higher than that of hexagon bolt. When assembling the high-strength torsional shear bolt connection pair, the side of the nut with round table should face the chamfering of the washer; the high-strength torsional shear bolt connection pair used in steel structure is an improved type of large hexagon bolt connection pair used in steel structure, and its main advantage is that its structure is simpler than that of hexagon bolt. Because the construction space required is very small, the electric wrench can be safely used to directly screw off the ring head at the tail. The operation is simple and fast, and it is very convenient to check the construction quality. It does not require professional personnel or equipment. Only by visual inspection to confirm that the plum head has been tightened, can the construction quality be guaranteed.
Each pair of twisted shear bolt connection pair GB / T 3632 includes one bolt, one nut and one washer. When assembling large hexagon head steel structure bolt connection, the side with chamfer under the bolt head washer should face the bolt head; when constructing large hexagon head high strength bolt, torque wrench should be used, which needs large operation space and should be completed in two parts: initial tightening and final tightening. The structure of torsion shear bolt is complicated. Quality inspection also requires torque inspection, which requires professional equipment and quality inspectors.
The company's main business: steel structure nut, steel structure bolt, high strength bolt, special-shaped nut, special-shaped bolt