Target installation stress of the bolt

The target installation stress of a bolt refers to the force applied to it during installation, used to ensure the tightening and sealing between the connected components. The stress exceeding the allowable value for bolts can occur in the following situations: 1. Excessive force is applied during installation, exceeding the tightening force required for the bolt’s design ； 2. Excessively long bolts were used, preventing the achievement of the required preload during tightening ； 3. There was an error during the threading process, preventing the bolt from being able to withstand the intended stress. To prevent the installation stress on the bolts from exceeding the required stress level, it is necessary to follow the pressure pipeline specifications or relevant standards strictly, and to ensure that the appropriate bolt materials and sizes are selected, as well as that the correct installation methods are used. At the same time, appropriate tools and equipment should be used during tightening, and the force applied should be controlled to prevent the bolts from being overstretched or damaged. .