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具有加强圈的聚四氟乙烯膨胀节和具有加强圈且外被不锈钢丝网紧贴包围的聚四氟乙烯膨胀节，在爆破内压下，波纹产生鼓胀破裂，本文提出了该爆破压力计算式。不锈钢膨胀节在较高内压下，波纹凸鼓大变形，最后发生纵向破裂，本文提出该爆破最大计算压力公式。
Teflon expansion joint with stiffener ring and Teflon expansion joint with stiffener ring and outer stainless steel wire mesh tightly enclose, and the bellows produce bulging and rupturing in blasting. In this paper, the formula for calculating burst pressure . Under the condition of higher internal pressure, the corrugated convex bulge deforms greatly and the longitudinal rupture finally occurs. In this paper, the maximum calculating pressure formula of the blasting is proposed.