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The eighth 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 eighth edition of
these standards include new information on drains and vents for
heaters. A new schematic piping arrangement for feedwater heaters
has been added as well. Variables and values in Paragraph 3.14.3,
Sample Problem for Determining Resultant Force and Moment, have
been revised. A revised Fig. No. 11a & 11b, Standard Tolerances
for Nozzle and Support Locations, has been included. Information
on high pressure, full access channels has been added as Paragraph
8.1.2, accompanied by a new drawing.
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.
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