Welcome to the aboveground storage tank forum, a bulletin board dedicated to tanks, fuel tanks, plastic tanks, fuel storage tanks, and above ground storage tanks (AST) API650, API653 & UL142 aboveground storage tanks (AST) and chemical plastic tanks. Remember the forum is made up of volunteers from experts to beginners. Unfortunately, we cannot allow free commercialism that promotes products, services, or sites.
Re: Gap between tank bottom and ring wall foundationFrom: Sam 
Date: Monday, June 29, 2009
Time: 12:23:31 AM
Remote Name: 126.96.36.199
This gap is around 20 mm between annular plate and tank foundation but still we have not done Hydro test. actual cause is foundation contractor done chipping on foundation so the reason gap is coming. However our client asking us to give guarantee for this tank. but we are worried about this. so i wanted to know is there any tolerance given for this gap in API? or is there any method to rectify?