Directing against the tube-burst accidents occurred on high-temperature superheater of unit no.1 in Shanwei Power Plant

test and analysis have been carried out.Results show that the cause resulting in tube-burst is long-term over-temperature and excess heating.For this

preventive measures

such as strictly controlling the steam temperature and the metallic wall temperature

avoiding large variation of the operating condition

and using steel sort of more higher level to replace the TP347H steel

etc.

have been put forward.