The American Society of Mechanical Engineers (ASME). Revision
2. Date of Issuance: August 19, 2008. 31p. This Standard covers process heating systems that are defined as a group (or a set, or combination) of heating equipment used for heating materials in the production of goods in an industrial plant. These systems, commonly referred to using terms such as furnaces, melters, ovens, and heaters, use heat sources such as fuels, electricity, steam or other fluids to supply the required heat.