膨胀节的压力试验和波纹管的失稳试验

Hydraulic Pressure Testing of Expansion Joint and Squirm Testing of Bellows

通过对最新版本相关国外标准和有关文献的分析、提出波纹管失稳试验时波纹管应固定于自由长度状态，膨胀节水压试验时试验压力不应使波纹管产生屈服或失稳。

By analysing the latest editions of related foreign standardes and references, it is proposed in this paper that the bellows must be set in free length condition during squirm testing and that bellows must not result in yieldlng or squirming at test pressure during bydraulic pressure testing.