Abstract: This paper introduces two schemes of domestic 4,000 m3 propylene spherical tank made of Q370R and 07MnMoVR steel plates. According to the characteristics of stress analysis and design, it introduces in detail the ordering technical analysis indicators of steel plates, forgings, and welding rods of the two schemes, the structural design of the spherical tank, and the finite element stress analysis. The paper also expounds the special and improved requirements in the manufacture and installation process of spherical tanks. Meanwhile, it compares the cost of the two construction schemes and the cost performance is considered to be equivalent.

Key words: propylene spherical tank, 4,000 m3, analysis and design, manufacture, install