Leakage of high pressure ammonia preheater pipe and ellipsoidal head in the joint production of melamine with urea is introduced, hazard and reasons of leakage are analyzed to put forward the methods for prevention of similar accidents.

• 摘要介绍了三聚氰胺尾气联产尿素装置的高压氨预热器列管及封头发生泄漏的情况，分析了泄漏产生的危害及原因，提出了防止类似事故发生的方法。