A structure of incline plane shoulder has been designed to improve the sealing performance of the joint and it improved the sealing ability effectively compared with the API joint.
The waterproof layer of the lap joint should stick (welding) firm, tight sealing, no distortion, fold, curling and blister defects.
卷材屋顶防水层的搭接缝应粘(焊)结牢固，密封精密，不得有扭曲、皱折、翘边和起泡等缺陷。
3
Under certain pre - tension from flange joint bolt, leakage of flange sealing had an obvious decrease, thus resolving sealing failure in cover flange of heat exchange.