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MJCronin on The difference between the API 650 & API 620

By: MJCronin 
Date: Friday, January 30, 2004
Time: 12:00:00 AM

Banu, My two cents worth, There is a USA regulation (NFPA-20 I think) that addresses the design of these tanks as well as underground fire mains. As I can best recall, Either API-650 or AWWA D100 can be used to design these tanks The major differences between the API 650 and API 620 rules are as follows: - For tanks with flat bottoms and operating pressures less than 2.5 psig, API-650 is commonly used as the design code. Tanks of 12"-6" diameter and smaller are commonly shop fabricated, - Tanks that have operating pressures between 2.5 and 15 psig or tanks in refrigerated service use API-620 as the design code Just my thoughts...... MJC





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