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Design And Construction Of Gas Storage Tank
- Feb 15, 2017 -

The main load of the gas tank is the internal gas pressure, the wind load and the seismic action. Wind pressure should be considered in wind load. The wind load factor of high pressure spherical tank is generally 0.30 ~ 0.35. The horizontal seismic action of the wet tank includes the seismic force generated by the tank and the weight of each tower, and the hydrodynamic pressure caused by the vibration of the water in the tank. The horizontal seismic action of the dry tank includes the seismic force generated by the weight of the cylinder and the weight of the piston. Calculate the snow load to consider the eccentric moment caused by the local accumulation of snow in the top of the tank.

Under the action of various loads and internal pressure, the shell wall and the roof of the tank are analyzed by the momentless theory of the shell structure. Low-pressure gas tank wall and roof thickness is generally not determined by the strength, but by the structure and corrosion requirements. The guide column of the column-type gas storage tank is subjected to the wind force and the horizontal seismic force on the tower section transmitted by the guide wheel. The guide wheel pressure can be decomposed into various planes by the plane truss analysis method. The inner column, the upper and lower girders and the guide rails of the spiral rails contain the space frame and bear the horizontal force of the wind load and the seismic force from the guide wheel. The cylinder of the dry gas tank shall check its local and overall stability under the wind load, horizontal seismic force and internal pressure. The spherical tank has a strong tensile strength under internal pressure, but its stability is poor under negative pressure. Therefore, it is necessary to specify the minimum working pressure to ensure that no negative pressure occurs when the temperature drops and the internal pressure decreases.