How is the preload of bolts calculated?

2010-02-04View Original

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How is the preload of bolts calculated?

Reply #22010-02-04

Please click the link: http://wenda.tianya.cn/wenda/thread?tid=247dccb0cf7ba845

Reply #32010-02-05

An important aspect to consider regarding preload is determining what level of preload is necessary for the gaskets between the mating flanges in order to achieve proper sealing. The specific calculation must be carried out using the formulas for M and Y values. Of course, sometimes some gaskets require a high degree of pre-tensioning, and when the space available for bolt placement is limited, it becomes impossible to achieve the required level of pre-tensioning; in such cases, it is necessary to consider using other types of sealing structures (such as low-stress load gaskets) in order to reduce the bolt pre-tensioning.

Reply #42010-02-05

Calculation of the flange part per GB150

Reply #52010-02-05

Normal connections can be tightened to a certain torque based on the bolt strength grade； Sealed connections require accurate calculation based on standards.

Reply #62016-05-12

GB/T16823.1

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