API 650 aboveground welded storage tanks impulsive spectral acceleration parameter

When encountering heavy rain or continuous heavy rainfall, the safe operation of API 650 aboveground welded storage tanks will be affected. For example: the API 650 aboveground welded storage tanks is submerged, the oil unloading valve and the flame arrester valve are broken by water and the oil tank leaks. The oil tank area must do emergency work to prevent rainstorm to ensure the safety of the oil tank. Here are some safety protection measures for API 650 aboveground welded storage tanks in heavy rain.

The refrigerated tank primary components shall also include those parts of a single-wall or an inner tank that are not in contact with the refrigerated liquid but are subject to the refrigerated temperature. Such API 650 aboveground welded storage tanks components include roof plates, roof manways and nozzles with their reinforcements, roof-supporting structural members, and shell stiffeners when the combined tensile and primary bending stresses in these components under design conditions are greater than 6000 lbf/in.2.

This specification, in conjunction with API 650 Standard, prescribes minimum standards for the API 650 aboveground welded storage tanks design, supply, fabrication, erection, and testing of field erected welded steel storage tanks complete with accessories as specified herein and as shown on attached Datasheets and/or Drawings.