When Must The Coupling Bolts Be Scrapped?

Coupling bolts must be scrapped in the following cases:
1. Bolts that are severely damaged or broken, such as obvious cracks, missing parts, or severe thread wear, need to be scrapped. Such bolts have lost their strength and reliability and can no longer be used to bear loads and maintain the connection of the coupling.
2. Bolts that are severely corroded or rusted, with obvious corrosion spots, grooves or rust on the surface, will reduce their strength and durability. Such bolts are prone to breakage and may produce unpredictable results when bearing loads, so they need to be scrapped.
3. Bolts may be affected by excessive fatigue after long-term use. If there is obvious tensile deformation, deformation or deformation lines, it means that the bolts have been subjected to excessive stress and fatigue. This will cause the strength of the bolts to decrease, making them no longer suitable for use.
4. Bolts that become stuck, loose or fail during use need to be scrapped. Such bolts can no longer normally complete their connection and fixing functions.