Changing Duty of an API Tank

"Low pressure storage tanks can be lethal and dangerous vessels – even in the pressure ranges of 0 to 15 psig and especially in the ranges of negative pressure (partial vacuum or 'external pressure')."

See the link below for the rest:

<a href="http://www.cheresources.com/chexpress/chexpress07_14.shtml#technically">http://www.cheresources.com/chexpress/chexpress07_14.shtml#technically</a> Received on Thu Jul 12 18:37:00 2007