Rigid waterproof casing construction requirements.

1 . Rigid water-proof casing in charge of more ductile iron pipe, rubber ring socket interface, to ensure the hardness, toughness and sealing of the pipe. Bridge pipe using D325 × 8 welded steel pipe, pre-buried branch pipe along the road using D219 × 6 welded steel pipe. In the use of waterproof casing before the specific circumstances of the pipe to choose the appropriate waterproof casing material.
 
2 . Rigid waterproof casing pipe in transport, handling and stacking process is strictly prohibited throwing or violent collision. Qualified waterproof casing surface is smooth and bump-free. The laying of the pipe should be in the inspection slot qualified before proceeding, before laying the pipeline to pipe, fittings, etc. to re-check the appearance of a problematic pipe and fittings are not allowed to use. Waterproof casing in use to be tested before the situation according to the pipe.
 
3 . Rigid waterproof casing pipe lifting and into the tank, a reliable soft belt spreader should be used, smoothly down the trench, not with the bottom of the tank and the wall of the tank violent collision. Piping dispersed configuration along the trench to reduce the secondary transport, to ensure the accuracy of the location of the pipe, you need to place a level with a scale in the pipe, the inspection to see whether the pipe coordinates on the sagging line and the level of the ruler coincide. Avoid forced stretching or inappropriate operation, which will not only burden the use of waterproof casing but also the use of the pipe.
 
4 . Before construction, pipe fittings and valves need to be tested, the pressure level should not be less than 1.5 times the working pressure of the pipeline, after the material is imported and before the pipe to pipe and accessories for inspection.