Importance of bolt connection design in pressure bearing of square stainless steel plate water tank structure

1. Selection of bolt diameter
Bolt diameter is one of the key factors affecting connection strength. In the bolted square stainless steel panel water tank structure pressure, the appropriate bolt diameter should be determined by calculation according to the expected working pressure of the water tank, plate thickness and material strength. Larger diameter can provide greater shear strength and tensile strength, but it will also increase cost and installation difficulty. Therefore, on the premise of meeting the strength requirements, the economy and construction convenience should be comprehensively considered to select the optimal bolt diameter.

2. Number and arrangement of bolts
The number and arrangement of bolts directly affect the stress distribution and overall stability of the connection area. Too many bolts may lead to complex installation and increased costs, while too few may lead to stress concentration and increase the risk of connection failure. Reasonable bolt arrangement should follow the principle of uniform distribution to ensure that the stress distribution on each connection plate is as uniform as possible to avoid local overload. At the same time, the minimum spacing between bolts should also be considered to prevent bolt failure caused by stress superposition.

3. Control of tightening torque
Tightening torque is a key factor to ensure that bolt connections are tight and loads are effectively transferred. Overtightening may cause excessive deformation or even breakage of the bolts or connecting plates; over-loosening will cause loose connections, affecting the sealing and stability of the structure. Therefore, the tightening torque must be strictly controlled during construction, following the recommended value provided by the manufacturer or calculated and determined according to actual conditions. Use tools such as torque wrenches for precise control to ensure that each bolt reaches the predetermined tightening state.

4. Design of preload
Preload refers to the tension applied in advance during the installation of the bolts, which is intended to reduce the loosening and deformation of the bolts during the pressure-bearing process. The design of preload is particularly important for structures such as bolted square stainless steel panel water tank structure pressure
 that are subject to dynamic or cyclic loads. Through preload, the expansion or contraction of the material caused by temperature changes, medium pressure changes, etc. can be effectively compensated to maintain the tightness of the connection. The setting of the preload needs to comprehensively consider factors such as the elastic modulus of the material and the yield strength of the bolt, and its effect should be verified through experiments to ensure that the connection is stable and reliable under actual operating conditions.