"One (1) used 44 sq. ft. Doyle and Roth U-tube shell and tube heat exchanger, carbon steel tubes and tube sheets, shell and bonnet with (30) .75" diameter x 4' long tubes rated 100 PSI @ 350 F, shell rated 100 PSI @ 350 F, 3", 1" tubes inlet/oulet, 3" shell inlet/outlet, 10" diameter x 4' long tube bundle, serial# J9954, national board# 19571, new 2003.
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