1. Before the construction of the large hexagonal bolts, the preparations for each process should be formulated according to the processing technology; 2. The materials and machine parts required for construction should meet the requirements of the process regulations; Before the training, let the workers understand the performance of the relevant high-strength bolts and what should be paid attention to during work; 4. It is necessary to check the torque wrench and other parts before construction. What are the operation steps of large hexagonal bolts? 1. The form, specification, model and process standard of large hexagonal high-tenacity bolt connection should meet the requirements of the design plan and national industry standards, and the bolt factory should also produce a certificate of qualification; 2 .The storage and delivery of bolts shall comply with the following requirements; (1) The storage place for large hexagonal bolts shall be in a place that is waterproof, rainproof, and smoke-proof, and shall be classified and stored according to the type and specification; When the bolts are in place, they should be handled with care to avoid collisions, damage to the packaging and damage to the outer threads of the bolts; (3) It is very useful for long-term storage or unreasonable storage of bolts that are rusted and stained with dirt. For situations that may cause the torque index of the bolt to change, cleaning and anti-rust treatment and lubrication should be carried out according to the actual situation. Maijin should test the torque index of the bolt or the pre-tensioning force when necessary, and immediately after passing the inspection Applicable; The test of large hexagonal bolts on the connection site should meet the following requirements: 1. In each work, before making a section and installing, it should be in accordance with the steel type of each component and the new surface treatment process The century is closely combined, and continuous experiments are carried out on the anti-movement index of the joint surface; 2. The number of each experiment is three groups; the results meet the standards and can be constructed.