This national standard specified the steeliness spherical tank ( hereinafter referred to as spheric tank) type and data base of nominal capacity, inside diameter of spherical shell, base center circle diameter of spheric tank, distance between mat undersurface and spherical shell center, stanchion quantity, zoning quantity of spherical shell, corner of sphere center and blocking quantity in each zone. This standard is applicable to the spheric tank, supported in equator tangent order and used to store technical grade gas and liquid materials relates to petroleum, chemical engineering, metallurgy and town gas.
