The steel structure bolt is called the steel structure bolt connection pair in the production and manufacture, generally not called the high strength bolt. Steel structure bolts are mainly used in industrial production and industrial buildings, railway tunnels, road and highway bridges, pipeline and highway bridges, tower and mast structure, heating furnace structure, heating furnace steel frame structure, long-span factory buildings, high-rise residential industrial buildings, various towers, light steel structures, lifting equipment and other steel frame structure connection engineering buildings. Each coupling pair contains a bolt, a nut and two sealing rings.
According to the installation characteristics of steel structure bolts, they are divided into large hexagon head bolts and torsional shear bolts. The product cost of torsional shear bolt connection pair with compressive strength is very high, and the hexagon bolt is high. When assembling the high toughness torsional shear bolt connection pair, the side of the nut with round table should face the side with fillet of the sealing ring; The high toughness torsional shear bolt connection pair for steel frame structure is an improved version of the large hexagon bolt connection pair for steel frame structure. The key advantage depends on the relativity of construction. The simple hexagon bolt and small indoor space are required for construction. The electric wrench can be used to screw off the red plum flower head at the end immediately. The safety is simple and convenient, and the inspection of construction quality is very convenient, Do not use technical and professional staff or machinery and equipment, just generally look at the inspection to ensure that the red plum flower head has been twisted off, you can ensure the construction quality.
The torsional shear bolt connection pair GB / t3632 contains one bolt, one nut and one gasket.
When assembling the bolt connection pair of large hexagon steel structure, the side with fillet under the sealing ring of the bolt head should face the bolt head;
The torque wrench must be used in the construction of large hexagon head high strength bolt, which needs a large space in the actual operation room and needs two sets of initial tightening and final tightening, so it is inconvenient to construct relative torsional shear bolt;
Quality inspection must also be torque inspection, must be technical professional machinery and equipment and quality inspection staff.
