This Practice describes the general fabrication, examination, inspection, testing, and documentation requirements for pressure vessels and shell-and-tube heat exchangers to be constructed in accordance with Section VIII, Division 1 {or 2} of the ASME Boiler and Pressure Vessel Code, henceforth referred to as the Code. This Practice describes the additional requirements for shell-and-tube heat exchangers to be constructed in accordance with TEMA Standards of the Tubular Exchanger Manufacturers Association.

This Practice is to be used in conjunction with design drawings or Data Sheets, and for project-specific design criteria that may supersede the requirements of this Practice but not take exception to the requirements of the Code. Total compliance with the Code, including stamping, shall be a basic requirement of all vessels ordered to this Practice. Unless otherwise specified in the purchase order or the drawings, all "U-" {U2-} stamped vessels shall be National Board (NB) registered.