GB50351-2014 and GB50351-2005 regarding the distance from spherical tanks to the inner toe line of the fire dike

Thread Content

In GB50351-2005 \"Code for Design of Fire Dikes in Tank Farm Areas\": 3.3.2 The distance from the wall of fully refrigerated liquefied petroleum gas and natural gas condensate storage tanks to the inner footline of the fire dike shall not be less than the difference between the highest liquid level of the tank and the height of the fire dike. The distance from the wall of a full-pressure spherical tank to the protective wall should not be less than half the diameter of the tank. According to GB50351-2014 \"Code for Design of Fire Dikes in Tank Farm Areas\": 3.3.2 For fully refrigerated liquefied petroleum gas, natural gas liquefied products, and liquefied natural gas storage tanks, the distance from the tank wall to the inner edge of the fire dike should not be less than the difference between the highest liquid level of the tank and the height of the fire dike, plus the head pressure equivalent to the vapor above the liquid surface ； When the height of the fire dike is greater than or equal to the highest liquid level of the storage tank, the distance can be unrestricted. The distance from the wall of a fully pressurized or semi-refrigerated liquefied hydrocarbon storage tank to the protective wall should not be less than 3 m. How is the distance between a fully pressurized spherical tank (such as an ammonia liquid tank) and the retaining wall determined?