Requirements to pay attention to when installing high-strength bolts

Requirements to pay attention to when installing high-strength bolts

High strength bolts and nuts are one of the most commonly used fasteners in industry. High strength bolts are made of high-strength steel or require significant pre tightening force. Steel structure bolt manufacturer Steel structure bolt is a high-strength bolt and also a standard component. Good fastening performance, used in steel structure and engineering to make its fastening effect good. In general steel structures, the required steel structural bolts must be higher than grade 8.8, as well as grades 10.9 and 12.9, which are high-strength bolts. Sometimes, bolts on steel structures do not require electroplating, so natural colors can be used. Pay attention to some requirements during installation work.

1. Product quality

(1) The surface rust, oil stains, burrs on the nut hole wall, welding burrs, etc. should be removed.

     （2）。 After treatment, the contact friction surface can reach the displacement coefficient required for the predetermined stroke. For high-strength applications, square nuts should be used to support bolts and washers. When using them based on matching, they cannot be interchanged.

(3) During component installation, the treated friction surface should not be contaminated by oil, soil, or other debris.

     （4）。 During installation, the friction surface of the component should be dry and should not begin to rain. Check and correct the deformation of the connecting steel plate before installation.

(5) Thread to prevent damage on the nut. When testing regular electric wrenches, please ensure the correct torque and follow the correct tightening sequence.

2. Installation safety methods:

(1) The opening size of the wrench should be the same as the opening size of the nut, and a small wrench should not be used to increase the sleeve.

     （2）。 Fixed wrenches should be used for high-altitude operations. If a wrench is used, it should be secured with a rope and the seat belt fastened.

(3) When assembling the above steel parts with connecting bolts, do not touch the connecting surface or plug with your hands, and place the fingers used to pick up and place the horn on both sides.