The utility model discloses a there is large pipe system scalable and removal passageway, scalable and removal passageway includes the head, be located the fixing device at head both ends respectively, there is the sleeve in the head, be located the movable tube coupling at sleeve both ends respectively, the one end of every activity tube coupling stretch into that the sleeve corresponds in the end and under the effect of hydraulic stretching mechanism in the sleeve reciprocating motion, sleeve flange is equipped with respectively at the sleeve both ends, the creeping flange is equipped with between activity tube coupling and the sleeve, the connecting rod passes the creeping flange in proper order, sleeve flange and nut cooperation, there is the fixed tube coupling that is located the head both ends respectively among the fixing device, there is mounting flange on every fixed tube coupling and the corresponding movable tube coupling respectively, loose flange, connecting bolt passes mounting flange in proper order, loose flange and nut cooperation. The utility model discloses good seal, dismantlement convenience do benefit to personnel and equipment and get into the pipe -line system internal work.