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                            全埋式膨胀节

                            发布日期:2020-12-03 16:38


                             

                                    全埋式波形膨胀节也是由“无约束膨胀节”加上防水结构而制成的。密封筒可以是橡胶∮筒。塑料波纹管或不锈钢波纹管。

                                    全埋式膨胀节具有良好的自密封保护性能和装有限位装置可直埋于地下,不必设井,在主固定管架之内允许设置2个以上的补偿器,减少分割补偿╱的歇固定客架,具有良好的导向性能,便于施工安装,投资少,无需维修保养,具有一定的经济效益和社会效益。

                                    全埋式膨胀节通常有两种形式:一是将膨胀节设置在专门的↘窨井小室内,便于检查维修;二是将膨胀节直埋〓于地下,不另▲设窨井,但是,此时波纹管外◣面有保护密封罩。无论何种形式,当设↑置在地下水位较高的沿海地区,因水中含有氯离子々,浓度较高,还含有带腐蚀性的【碱金属,若隔水措施不好,窨井内会☆积水,使♀膨胀节浸泡在水中,或保护罩密封不好,地下水会渗透进入保护罩与波纹管之间,会使300系列奥氏不⌒锈钢制造的波纹管发生腐蚀破裂