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疏水系統：疏水系統設置在補償器的疏水口或者安裝在盡量靠近固定支架的地方，如果疏水系統設置在管道上，應先在管道上安裝集水罐，然后用排潮管引出。上返至疏水操作井內列出兩個分支管，一個為啟動疏水，一個為經常性疏水。經常性疏水用熱動力疏水閥控制。然后引入排水井或窨井，建議操作井與排水分開，便于操作，避免發生危險。

The steel covered steel directly buried steam pipeline is simple, energy-saving and anticorrosive. Occupying all walks of life. The anticorrosion grade of directly buried thermal insulation pipeline steel bushing should be determined according to the local soil corrosivity grade. When the corrosive grade of soil directly buried insulation pipe soil is high, the special strengthening grade should be considered. When the corrosive grade of soil is medium, the strengthening grade should be considered. When the corrosive grade of soil is low, the general grade should be considered. Therefore, it is necessary to make clear the corrosion grade of the pipeline laying section in order to optimize the anticorrosion grade. Cathodic protection of directly buried thermal insulation pipeline is one of the electrochemical protection methods in metal corrosion protection process. Unlike other direct-buried insulating pipe anticorrosive technology, it exerts current on the protected metal body, so that the electrode potential of the protected metal body is negatively shifted, and the metal loses the tendency of spontaneous change from atomic state to ionic attitude, thus fundamentally inhibiting the occurrence of corrosion. But this process must be carried out in the electrolyte, so the buried steel pipeline is very suitable for cathodic protection. Cathodic protection and the anticorrosive layer of the directly buried insulating pipe itself complement each other. The existence of the anticorrosive layer can greatly reduce the current consumed by the cathodic protection, and the cathodic protection can make up for the shortcomings of the integrity of the anticorrosive layer, so as to achieve a perfect combination of safety and economy. It is currently recognized as the * anticorrosive scheme. Our company is a large manufacturer of prefabricated directly buried insulating steel pipes, prefabricated directly buried insulating steel pipes, steel steam directly buried insulating steel pipes, steel steam composite aluminium silicate insulating steel pipes.