阻火帶
                                                                                           阻火帶是用雙層不銹鋼卷材中間夾特種防火棉制成的，耐火極限可滿足1小時-4小時，
                                                                                           可根據工程設計選用不同等級的阻火帶，
                                                                                           產品執行GB/T9978-1999《建筑構件耐火性能實驗方法》。
                                                                                          
                                                                                           阻火帶的安裝

                                                                                           四、擺上阻火帶，在塑料膨脹管位置釘上水泥鋼釘