Drainage pipe layout and laying requirements
1, the shortest pipeline, hydraulic conditions. (2) Drainage riser should be located in the dirtiest, the most impurities and the largest amount of drainage at the point of drainage. Drainage pipe should be as well as a short distance to the outdoors. (3) Pipe drainage pipe as far as possible in a straight line arrangement, when the conditions are limited, it is appropriate to use 45-degree elbow or B pipe. (4)Sanitary ware drain and drain
The water cross branch pipe should be connected by 90 degree diagonal tee. (5) cross pipe and cross pipe cross pipe and riser pipe is appropriate to use 45 degrees three (four) pass or 90 degrees three (four) pass, can also be used at right angles to the water tee or right angle to the water tee and other fittings
(6) drainage riser and drainage pipe end of the connection, it is desirable to use two 40-degree elbows or bending radius is not less than four times the diameter of the pipe of the 90-degree elbow 1.1.7 Discharge pipe connected with the outdoor drainage piping, the discharge pipe Top elevation is not
To be lower than the top of the outdoor drainage pipe elevation, the connection of the water flow angle shall not be less than 90 degrees. When there is a fall difference and greater than 0.3m, may not be subject to angle restrictions. (7) the lowest drainage check branch pipe connected to the discharge pipe or drainage check on the pipe, the connection point from the bottom of the riser horizontal distance should not be less than 3.O m. (8) When the drainage riser only extends the top of the vent pipe (no special vent pipe), the lowest drainage cross vent pipe and the riser at the point of connection from the bottom of the drainage riser vertical distance, the specification provides. (9) When the building more than 10 layers. Ground floor domestic sewage should be set up a separate pipeline discharged to the outdoors.
2, easy to install, maintenance and clearing (1) try to avoid the drain pipe and other piping or equipment cross. (2)Pipes should generally be buried in the ground or laid on the ground, floor under the surface, such as construction or process has special requirements in the pipe groove, pipe wells, pipe trench or ceiling concealed, but it should be easy to install and overhaul. (3)Drainage riser pipe center and field distance set in accordance with the specifications
3, production and use of safety (1)The location of the drainage pipe shall not interfere with the production operation, transportation or use of the building. (2) haiku pipeline shall not be arranged in contact with water caused by combustion, put down the explosion or damage to the raw materials, products and equipment above. (3) overhead piping shall not be arranged in the living room, cafeteria, kitchen operation room above the main food; also can not be laid in the amount of food storage questions, halls, libraries and special requirements for health in the plant. (4) overhead piping shall not be suspended in food warehouses, warehouses of valuable commodities, ventilation rooms and power distribution.
4, protect the pipeline from damage (1) drainage buried pipeline. Shall not be arranged in the possibility of heavy pressure or through the foundation of the production equipment. In special circumstances, should be handled in consultation with the relevant professional. (2) Drainage pipes shall not pass through settlement joints, flue and wind
channels, and shall not pass through expansion joints. When the conditions must be crossed, corresponding technical measures should be taken. (3)Clearance size shall not be less than the amount of settlement of the building, generally should not be less than 0.15 m. The practice of its 4 junction water
"Drainage Standard Atlas"
"S312, high-rise buildings, the discharge pipe should be taken to take effective measures to prevent settlement. (4)Drainage riser through the floor, should be set up casing, for cast-in-place floor should be pre-group holes or set of people casing, the hole size
Inch requirements than the pipe diameter of 50-100m.(5)In the factory building drainage pipe minimum depth of burial should be set up in accordance with the provisions of the specification. Under the railroad tracks should be used steel pipe or knotted cast iron pipe, and the minimum depth of burial shall not be less than 1m.(6) cast iron drainpipe in the following cases, should be set up flexible interface. (a)Towering buildings and building height of more than 100m in the building. (b)Drainage riser height of more than 100m or in seismic defense of 9 degrees. (c)Other buildings may also use flexible connections when conditions permit. (7) Drainage buried pipes shall be treated with anti-corrosion. (8) haiku water risers should be fixed using pipe clamps, pipe clamp spacing shall not exceed 3.0, pipe clamps declared in the riser joints Road using supports, hangers fixed at a distance of not more than 1.0m
5, to prevent water contamination
(1) the following equipment and containers shall not be directly connected with the sewage (wastewater) piping system should be taken in the form of indirectly slandered water. (a) domestic drinking water storage rice (pool) of the drain pipe and overflow pipe. (b) Kitchen food equipment and washing equipment in the hao water. (c) Medical sterilization and disinfection equipment of the sluice water. (d)Drainage of evaporative coolers, air cooling towers, and other cavernous equipment. (e)Cold storage rooms for storing food or beverages, cold storage warehouses with foundation 6 water and chiller frost dissolving water pans with moon ice. Indirect drainage refers to sanitary appliances or water equipment slander out of the pipe (mouth) and slander water pipeline can not be directly connected, there should be an air partition in the middle, so that the outlet of the drain pipe directly with the atmosphere, in order to prevent the water quality is contaminated.
(2) the drain inside to ensure clean, in leaving a pre-hole, blocking material as much as possible to choose a clean and suitable for the exclusion of things, such as transparent adhesive, boards, etc., such as causing blockage should be cleaned up even if the project for the future to reduce the unnecessary trouble
(3) indirect drainage of funnels or containers shall not produce spattering, overflow and should be laid out in a position easy to check, clean.
(4) drain and other pipes *** buried with the minimum horizontal clearance of 1.0m-3.0m, vertical clearance of 0.15m-0.20m or so. If the drain is located parallel to the water pipe, and higher than 1.5m above the distance, the horizontal clearance shall not be less than 5.0m. cross-buried, the vertical clearance shall not be less than 0.4m, and the water pipe should be equipped with a protective casing.