Re: Plumbness level alowed in storage tank as per api-650 designFrom: Ced 
Date: Thursday, February 17, 2011
Time: 10:44:01 AM
Remote Name: 126.96.36.199
CommentsThis means for the total height of the tank.
For single shell, you have to follow spec for permissible variations as stated in ASTM standard applicable 7.5.2 a