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steve ,
 i agree that 3A and 3AA steel tanks can be retested for 110% fill at any
time.  but  are you sure that the tank that fails the retest for 110%
fill can be retested for 100 % fill?   i thought that ;

" Failure to pass the elastic expansion test indicates that allowable
test and working pressure wall stresses would be exceeded and indicates
that the cylinder should be rejected from further service at marked
service pressure . It should not be inferred that the cylinder should be
rejected from further service at 110% service pressure only." 
(from CGA pamphlet 5)

perhaps i am interpreting the reference materials incorrectly or don't
have all the information.  can you please quote where it says that the
failed cylinder can be retested for the 100% fill. 

thanks.....janet
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