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Earl and the Aboveground Storage Tank Forum for fuel tanks, plastic tanks, fuel oil storage tanksWelcome 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.
 
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Stephen H on Differences between API 12F & API 650

By: Stephen H 
Date: Saturday, December 31, 2005
Time: 12:00:00 AM

API 12F is intended mainly for oilfield service. API-650 is more general. API 12F includes certain standard dimensions of tanks. It is generally set up so that a minimum of engineering is required- details are mostly set forth in the standard. No weld x-ray is required. API-12F appurtenances are more standardized. API-650 is set up so that any dimensions desired can be used for the tank. Application of API-650 will require a certain amount of engineering. Weld x-ray is generally required, although it may be omitted as an option under Appendix A. API-650 allows more variation in appurtenances. API-650 also includes geodesic domes, floating roofs, higher-temperature service, etc. If your tank dimensions match one of the available sizes of API-12F, and especially if it is oil-field application, that is probably the way to go. If dimensions do not match 12F, or other operation conditions are not covered by 12F, then use API-650. If I remember right, a 500 barrel tank can be shop fabricated under API-12D (one of the 12-specs, not sure about the "D")- check with local tank fabricators to see if this is practical.





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