沟槽管道的安装工艺

沟槽管道的安装工艺管道安装♦机具准备：选择符合要求滚槽机、开孔机和切管机；♦管道准备：垂直切割管道，清洁和加工管端凹槽，加工时小心管道爆裂，和出现锋利边沿，锋利边沿可能损坏密封圈，凹槽宽度和深度，必须符合凹槽技术标准。♦检查和润滑密封圈：检查密封圈，确保密封圈规格正确。在密封圈外部和内部密封唇上，涂薄薄一层润滑剂。应小心不要将颗粒杂质黏附在密封圈表面。使用润滑剂作为密封圈的配件。优良的密封圈润滑剂是防止密封圈磨损和可能损伤的基础。（如下图）♦密封圈安装滑动密封圈到管端，确保密封唇不要悬垂在管端。（如下图）Q；♦密封圈定位将密封圈在靠拢的两侧管端上定位后，把密封圈拉到两侧管端凹槽的中心位置。密封圈不应进入管道凹槽。（如下图）♦安装连接器外壳把外壳合在密封圈上，使壳体卡口咬合在管道凹槽内，插入螺栓，用手拧紧螺帽。（如下图）♦拧紧螺帽交替、均匀地拧紧两侧螺帽，直到螺栓底座金属面接触，螺栓收紧。机械三通、机械四通安装先从外壳上去掉一个螺栓，松开另一螺帽直到与螺栓端头平，将下壳旋离上壳约90度，把上壳出口部分放在管口开口处对中并与孔成一直线，在沿管端旋转下壳（如是机械四通，下壳方法与上壳相同）使上下两块合拢。法兰片安装♦安装法兰片：先松开两侧螺丝，将法兰两块分开，分别将两块法兰片的环形键部分装入开槽管端凹槽里，再把两侧螺丝插入拧紧，调节两侧间隙相近。♦安装密封圈将密封圈"C"形开口处背对法兰，沿管端方向推入法兰内径凹槽内即可选择符合要求的橡胶密封圈附（表一）管外径与沟槽加工尺寸附（表二）管道支吊架安装附（表三）管道加工尺寸附（表五）质量要求♦管道安装时应考虑管间隙量，也就是钢管的膨胀量。♦管道安装后要进行试压检查是否泄漏。如有泄漏其原因如下：♦螺栓没拧紧，卡箍接触面有间隙。♦沟槽加工深度应符合要求。♦密封面不应有杂质。♦钢管端部密封面有伤痕或沟线状伤痕不能安装。♦密封圈不能有啃圈。♦钢管外径不能超差。♦加工后钢管端部至沟槽距离不能小。♦安装不符合要求，超过规定的转角。♦钢管开孔引分支.在管路中引出分支,首先必须在管道开孔,孔必须开在管道中心线上并且尺寸要正确,开孔要用专用工具.附（表四）孔开好后检查孔周围16mm范围的管表面清洁、光滑、无污物皮屑、凸出物方可安装。表一橡胶密封圈的选择橡胶原料应用范围橡胶圈色标记天然橡胶用于-35°C〜+80°C的水和无油气体黑色/111I»乙丙橡胶用用于-30°C〜+100°C—般介质、耐老化绿色丁晴橡胶用于-40°C〜+120°C的油、油雾和煤气橙色卤化丁橡胶不含油、含有多种稀酸的水和气体棕色氯橡胶用于-20°C-200°C以下化学物品蓝色白色丁晴橡胶不含碳黑、可用于食品白色氯丁橡胶一定范围内的润滑油及化学品黄色有机硅橡胶用于-40°C-250°C以下的不带烃类的空气红色表二管外径与沟槽加工尺寸表单位：mm钢管外径尺寸沟槽至管径尺寸沟槽宽度沟槽外径（C）标准最大最小标准最大最小标准最大最大最大最小42.242.641.815.916.615.17.147.906.3838.9938.6148.348.847.815.916.615.17.147.906.3845.0944.70

60.360.959.715.916.615.18.749.507.9857.1556.7776.176.975.315.916.615.18.749.507.9872.2671.8088.989.788.115.916.615.18.749.507.9884.9484.48108.0108.8107.215.916.615.18.749.507.98103.70102.94114.3115.4113.515.916.615.18.749.507.98110.10109.57139.7141.1138.915.916.615.18.749.507.98135.48134.97159.0160.4158.015.916.615.18.749.507.98153.41152.65165.1166.7164.315.916.615.18.749.507.98160.78160.22168.3169.9167.519.116.615.18.749.507.98163.96163.40219.1220.7218.319.119.818.311.9112.6711.15213.70212.98273.0274.6272.219.119.818.311.9112.6711.15267.60266.93325.0326.6324.219.119.818.311.9112.6711.15318.29317.53表三管道支吊架安装公称管径D.N.用刚性接头每根管吊架数用挠性接头每根管吊架数对6m长管对9m长管对6m长管对9m长管502334652323802323100232312523231502323200232325023233002323

表四管道分支开孔尺寸表主管外径（mm）支管外径（mm）开孔直径（mm）014226260242212603482626044826260557.0：60.348.0380657.0：60.342.3380757.0：60.333.5380857.0：60.326.8380976.148.0441076.142.3441176.133.5381276.126.8381388.960.0641488.948.0511588.942.3511688.933.5441788.926.84418108.0(75.5)：76.17019108.060.37020108.048.05121108.042.35122108.033.55123108.026.83824114.0(88.5)：88.98925114.0(75.5)：76.17026114.060.37027114.048.05128114.042.35129114.033.55130114.026.83831140.0114.011432140.0(88.5)：88.98933140.0(75.5)：76.17034140.060.37035140.048.05136140.042.35137140.033.55138165.0114.011439165.0(88.5)：88.98940165.0(75.5)：76.170

41165.060.37042165.048.05143165.042.35144165.033.55145159.0108.011446159.060.370英制2/41〃11/4■11/2〃21/24—3〃公称直径DN20DN25DN32DN40DN50DN70DN80标准26.733.442.248.360.37376.188.9上公差2733.742.648.860.973.776.989.7下公差26.533.141.847.859.772.375.388.1标准15.8815.8815.8815.8815.8815.8815.8815.88上公差16.6416.6416.6416.6416.6416.6416.6416.64下公差15.1215.1215.1215.1215.1215.1215.1215.12标准7.147.147.147.148.748.748.748.74上公差7.97.97.97.99.59.59.59.5下公差6.386.386.386.387.987.987.987.98最大23.8330.2338.9945.0957.1569.0972.2684.94101.6102.6100.815.8816.6415.128.749.57.9897.384〃DN100114.3127115.4128.3113.5126.215.8815.8816.6416.6415.1215.128.748.749.59.57.987.98110.08112.78139.7141.1138.915.8816.6415.128.749.57.98135.485〃DN125141.3152.4142.7153.8140.5151.615.8815.8816.6416.6415.1215.128.748.749.59.57.987.98137.03148.086〃6〃8〃10〃DN150DN150DN200DN250158.8165.1168.3203.2219.1254273323.9160.4166.7169.9204.8220.7255.6274.6325.5158164.3167.5202.4218.3253.2272.232315.8815.8815.8819.0519.0519.0519.0519.0516.6416.6416.6419.8119.8119.8119.8119.8115