API Std 650 unanchored flat-bottom tank manufacturer's standard drain

To scientifically evaluate the remaining service life of the API Std 650 unanchored flat-bottom tank, it is necessary to know the thickness change and development trend of the storage tank sheet after long-term use, combined with the metal characteristics of the storage tank, the influence of various external conditions and the continuous change of the oil pressure in the API Std 650 unanchored flat-bottom tank, etc. factors to judge. Because the metal characteristics, corrosion defects, load and other numerical parameters of the API Std 650 unanchored flat-bottom tank are randomly changed, the value of the remaining service life of the storage tank will also be dynamic.

API Std 650 unanchored flat-bottom tank any joints between the adjacent sections of stiffening rings, as shown in Figure R-1, shall be made so that the required moment of inertia of the combined ring-shell section is provided. Weld joints between adjacent sections shall be made with full-thickness and full-penetration butt-welds. Stiffening-ring butt-welds may employ metal backing strips. Backing strips and the associated welding shall be made in a manner that provides a smooth contour in the rat hole and all other weld joints ends. All weld passes shall be started at the rat hole.

API 650 tank has the advantages of less load on the floating plate, simple and light structure, and can save the central drainage pipe and rotating floating ladder on the API Std 650 unanchored flat-bottom tank floating plate. The materials for easy construction and maintenance and sealing parts can avoid aging due to sunlight.