scope:

The ninth edition of these standards has been developed by the Closed Feedwater Heater Section of the Heat Exchange Institute, Inc. The technical information in these standards combines present industry standards, typical Purchaser requirements, and Manufacturer's experience. In addition, the standards outline the important design criteria for closed feedwater heaters.

These standards provide practical information on nomenclature, dimensions, testing, and performance. Use of the standards will ensure a minimum of misunderstanding between Manufacturer and Purchaser, and will assist in the proper selection of equipment best suited to the requirements of the application.

Some of the new material incorporated into the ninth edition of these standards include new information in Section 2.1, Heater Performance, revisions to Section 2.7, Tube Side Pressure Loss, new information in Section 3, Mechanical Design Standards, just to name a few.

In preparation of this standard, consideration has been given to the work of other organizations, such as the American Society of Mechanical Engineers, the American Society of Testing Materials, the former Feedwater Heater Manufacturers Association, the Tubular Exchanger Manufacturers Association, and others. Credit is hereby given to all those whose standards may have been helpful in this work.