DN700 waterproof casing flexible waterproof casing rigid waterproof casing

Pipeline construction plan for the waterproof casing series
The main pipe of the waterproof casing is made of ductile iron pipe, the rubber ring socket interface, the bridge pipe is made of welded steel pipe, and the pre-embedded branch pipe along the road is made of welded steel pipe.
Pipe fittings and valves need to be tested before construction. The pressure level should not be lower than the working pressure of the pipeline. Pipes and accessories must be inspected after the materials enter the site and before they are put down, including written certificates and physical inspections.
It is strictly forbidden to throw or violently collide with waterproof casing pipes during transportation, loading, unloading and stacking. The laying of pipelines should be carried out only after passing the groove inspection. Before laying the pipelines, the appearance of the pipes and pipe fittings should be re-inspected. Pipes and pipe fittings that are found to be problematic must not be used.
When lifting and placing waterproof casing pipes into the trench, reliable soft-strap slings should be used to lower them smoothly into the trench without violent collision with the bottom and wall of the trench. When piping, arrange them dispersedly along the trench to reduce secondary handling. In order to ensure the accuracy of the down pipe position, a level with a central scale needs to be placed in the pipe. During inspection, look at the center hanging line hanging down on the center line of the pipe coordinates and the center of the level. Whether they overlap.