Vertical Storage Tank Height Diameter Ratio

Dear sir what is the preferred l d ratio for atmospheric tanks.

Vertical storage tank height diameter ratio. As a normal practice the l d ratio of atmospheric storage tank is considered within the limit of 0 5 to 1 1. Awwa d100 or api 650 gives option for both ratios. About the highest aspect ratio tanks that i have seen were shop built tanks 10 foot diameter and 38 feet high about 3 8 to 1 give some thought to allowing 3 to four feet minimum all around the tank. What is the significance of choosing optimum l d ratio in atmospheric storage tanks.

For example fresh amine storage tank. But api indirectly volume of the storage tank as it limits max shell thickness of storage tank shell course to 45 mm only. Tank sizes volume description rough diameter when h d 1 100 m3 small 5 m 100 1 000 m3 medium 5 10 m 1 000 10 000 m3 large 10 20 m 10 000 m3 very large 20 m larger than 200 000 m3 is that economical 60 m height and diameter limitations. Basically it depends on local juricdiction which defines mx height of storage tank.

Say for atmospheric water storage tanks length greater than diameter or diameter greater than length is preferred. Decide upon the method of support for the tank ring wall and also consider performing a study of the ground to support the tank weight. So no limitation on h d ratio as per api650 620. Tanks l d ratio posted in industrial professionals.

However it is noticed that for some tanks it doesn t follow this limit. In india there is max height limitation for hc storage tanks is 20 mtrs. The temperature stratified storage tank is unique in that its water depth is rather shallow 5 m while the tank diameter is quite wide 290 m 2.