![]() ![]() TEMA R also requires a greater minimum thickness for some components. Spiral wound gaskets with a ring construction also meets this TEMA R requirement. TEMA R includes the requirement for confined gasket joints where recesses must be machined in the flanges and tubesheets. TEMA B and TEMA R are very similar in scope. The general description of the three major TEMA classes are: Tema C - General Service TEMA B - Chemical Service TEMA R - Refinery Service Tema R is the most restrictive and TEMA C is the least stringent. Vendors who build to TEMA standards can be competitively compared because tolerances and construction methods should be very similar for a given design. An advantage of TEMA standards is that end customers recognize that the specifications set forth comprise industry standards that directly relate to recognized quality practices for manufacturing. ![]() TEMA stands for Tubular Exchanger Manufactures Association. 2 TEMA is a set of standards developed by leading heat exchanger manufacturers that defines the heat exchanger style and the machining and assembly tolerances to be employed in the manufacture of a given exchanger.
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