High-pressure heater is an important equipment of the feed-water heat-regenerative cycle

its performance and reliability in operation have direct influence upon the economic aspect and security of the unit. Combined with the structure and system arragement of the said high-pressure heater

common faults of the heater proper

its accessories

and the system have been presented

summarizing the harmfulness of said faults. Causes leading to the said faults have been analyseed from aspects of design

manufacture

operational manipulation

as well as repair and maintenance etc.

and preventive measures should be taken for some key causes having been given.