In our ASME Code facility we fabricate a variety of heat transfer products in Stainless Steel, Titanium, Zirconium, Tantalum, Niobium, Cr-Ni Alloys, Graphite, Ceramic & others. Apex offers ASME & TEMA custom, shell & tube, graphite heat exchanger, plus more-4"- 60" diameter shells up to 20' long!