When does a tank need to meet AWWA standards?
When does a tank need to meet AWWA standards?
(OP)
I am working on some drawings to replace our rusted out 6000 gallon rectangular cold well tank that sits below our cooling tower. Looking at the original drawings for the tank, it states to be constructed in accordance with AWWA. I am curious as to when a tank needs to be to this standard? Is it only tanks that are used at a business? Is it a liability thing? The drawings for our current tank do not show any structural support, yet the actual tank has 2x6 tubing welded all around it (appears to be way over engineered). I am wondering if the 2x6 tubing was added because of the AWWA standard, and how I would go about designing the new tank to be structurally sound.





RE: When does a tank need to meet AWWA standards?
There aren't any common tank standards that address rectangular tanks and AWWA was probably used for lack of something better. You could use the minimum thicknesses and the allowable stresses from the standards, and comply with requirements for accessories to the extent they are applicable.
RE: When does a tank need to meet AWWA standards?
Standards do offer a measure of protection for the engineering professional but they are no substitute for first principles and engineering expertise.
“The beautiful thing about learning is that no one can take it away from you.”
---B.B. King
http://waterhammer.hopout.com.au/
RE: When does a tank need to meet AWWA standards?
RE: When does a tank need to meet AWWA standards?
Well I can't build a pressure vessel to B31.x no matter what my customer thinks.
RE: When does a tank need to meet AWWA standards?
Where did I suggest you build a pressure vessel to B31x? However I have designed and built underground slug catchers to ASME B31.3 with the agreement of the owner and authority. These could arguably be pressure vessels however because of their length and diameter all parties agreed that ASME B31.3 was apprpriate.
You on the other hand are talking about a 'tank' which is an atmospheric unit NOT a pressure vessel.LOL
The point I was making was that standards should be used in their enirety. Too often inept engineers like to design to one standard and then attempt to fabricate, test or commission to another.
“The beautiful thing about learning is that no one can take it away from you.”
---B.B. King
http://waterhammer.hopout.com.au/