Used 438 SQ FT Praj Industries vertical 304L Stainless Steel shell & tube heat exchanger. 33" ID x 16'8" overall length (170) 1" x 9' tubes, shell 25psi@275F, tube 10psiFV@212F, single pass both sides. National Board #15. Serial #06D058-H1463B. Built 2008. Last use Side Stripper Reboiler - steam heated.