An outlet 28 is provided on the products header to withdraw reactants which emerge from {HEAD ~ the tube bundle} for {TAIL ~ subsequent processing} 
for
An outlet 28 is provided on the products header to withdraw reactants which emerge from { HEAD ~ the tube bundle } for { TAIL ~ subsequent processing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL