1. Inspection before installation
Before installation, the rust, oil stains, burrs on the nut hole wall and welds on the bolt surface should be cleaned to ensure that the contact friction surface meets the requirements of the anti-scratch coefficient after treatment.
Check whether the bolts have missed plating or uneven zinc layer thickness to avoid rust caused by defects in the galvanized layer.
2. Precautions during installation
During installation, the friction surface of the component should be kept dry and should not be stained with oil, soil and other debris.
It is strictly forbidden to perform installation operations in the rain to avoid damage to the galvanized layer due to a humid environment.
Matched bolts and washers should be used during installation and should not be used interchangeably.
It is strictly forbidden to hammer the nuts to avoid damaging the threads of the nuts.
3. Maintenance after installation
Regular inspection: Check the tightening status of the bolts regularly to ensure that there is no looseness or damage.
Rust prevention: If signs of rust are found on the surface of the bolts, the damaged galvanized layer should be cleaned and repaired in time.
Sealing protection: In a humid environment, a waterproof sealing ring or protective cap can be used to seal and maintain the bolts.
4. Storage environment
Hot dip galvanized bolts should be stored in a dry, well-ventilated environment to avoid contact with corrosive gases or organic volatile substances.
During storage, avoid placing bolts in dense piles to prevent oxidation of the zinc layer due to poor ventilation.
5. Other precautions
During the installation process, avoid using power tools to apply excessive force to the bolts to avoid damaging the galvanized layer.
For important load-bearing structures, it is recommended to establish a detailed regular inspection plan to ensure the stability and safety of the bolts.
