The PE pipeline does not stop loses the opening trap equipment to be suitable in the urban PE fuel gas loses the tubing nema network’s construction work. Mainly applies in presses the movement in the belt gas rangeon the PE pipeline pipe network meets the branch, affixes or replaces the valve, the replacement length of pipe, the pipeline to re-route and to transform, as well as the service, the emergency repair, rush to deal with an emergency and construction works and so on processing pipeline breakdown, avoids the economic loss which and the adverse effect which stops because of construction work loses creates to the social product life, eliminated the biography to lead is mad the operating type the safe hidden danger.