{TAIL ~ The modular heat exchanger} can include U shaped {HEAD ~ fittings} to interconnect said flow tubes so a number of modules can be placed in series to circumferentially extend around large tanks or the like 
{ TAIL ~ The modular heat exchanger } can include U shaped { HEAD ~ fittings } to interconnect said flow tubes so a number of modules can be placed in series to circumferentially extend around large tanks or the like
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH