There are two types of surface of the rainwater dumplings, one is matt and the other is bright. It can be designed according to the size of the displacement. Different models, specifications, and sizes can be made according to customer requirements. Ductile iron rainwater gutters are adjustable and gap-type gutter covers, which are both beautiful and environmentally friendly, and can create a healthy life for you. Ductile iron dumplings are light in weight, only a quarter of steel and two thirds of aluminum.
Ductile iron dumplings are ten times stronger than rigid polyvinyl chloride. Its strength greatly exceeds that of aluminum and reaches the level of ordinary steel. Nodular cast iron rainwater rafters are used in the installation and use of the grid without generating electric sparks due to collisions, and are particularly suitable for use in environments that are prone to explosion and combustion.
The distance between rainwater mules is between 25 and 50 meters, and its position must be coordinated with that of the inspection well. The angle between the connecting pipe and the main pipe should preferably be close to ninety degrees. When diagonally connected, the connecting pipe should be arranged so that the water flow from the main pipe is in the same direction. Plane intersections should be arranged with rainwater outlets in a vertical design, and measures should be taken to prevent rainwater from entering the intersections.
The minimum pipe diameter of the ductile iron rafter connecting pipe is 200 millimeters, the connecting pipe slope should be greater than 10 percent, and the length should be less than or equal to 25 meters. The thickness of the covering soil is greater than or equal to 0.7 meters. The gullies can be connected in series when necessary. There should be no more than three rain rafters in series, and the diameter of the outlet connection pipe should be increased. The base of the gutter connection pipe is the same as the foundation of the rainwater pipe.
Rainwater outlets shall be provided at the upstream of the sidewalk, the traffic volume, the upstream of the entrance and exit of the unit along the street, and the outlet of the neighborhood or courtyard that runs on the ground. In low-lying roads and areas prone to waterlogging, rainwater outlets should be appropriately increased as needed. The gullies are of vertical type, joint type and flat type.
The vertical gully has a powerful hole type and a stand type, which is suitable for stone roads. The vertical hole type is suitable for places where the gap is easily blocked by debris. The rainwater dumplings have the ability to release water. The combined rainwater dumplings have a larger capacity than the flat rainwater dumplings.