What is the slope specification of outdoor drainage pipeline? What is the standard?

This is not difficult to solve. The following is a detailed introduction:

The 1. specification does not specify the maximum slope of outdoor drainage pipes, but different maximum flow rates are specified for pipes made of different materials according to the ability of pipes to withstand scouring.

2. If the flow velocity exceeds, it is necessary to set up water falling energy dissipation. There is a certain relationship between pipe diameter, flow velocity and slope, so the maximum drainage slope of pipes with different materials and sizes is different;

3.PS: 4.2.5 The maximum design flow velocity of drainage pipeline shall meet the following requirements: 1 kloc-0/0.0m/s for metal pipeline; 2 Non-metallic pipeline: asbestos pipeline 3.0m/s; Concrete pipe 4.0m/s; The relationship between the pipe diameter and the minimum slope of plastic pipe is 4.0 m/s, Relationship between pipe diameter and maximum slope Diameter (mm) Minimum slope (%0) Diameter (mm) Maximum slope (%0) 200 4.0 200100 250 3.0 250 70 300 2.2 300 50 350 2.0 350 50 40010.5 400 50 400. .3 45025 700 0.725 700 25 800 0.6 800 25 900 0.6 900 25 1000 0.5 1000 20 1200 0.5 1200 18 1400 0.5 / kloc-0/400 15 65 438+0600 0.5 1600 12 1800 0.5 1800 1 1 2000 0.5 2000 9.5 2200 0.5 2200 8.5 2400 0.5 2400 7.5 2600 0.5 2600 6.5

4. Standard: Generally speaking, there is no specific specification and standard requirement for setting the maximum slope of outdoor drainage pipeline, because there are many influencing factors in setting the slope of outdoor drainage pipeline, such as pipe material, pipe diameter and flow rate.

"Outdoor Drainage Pipeline Construction" is one of the characteristic teaching materials for the major of urban construction in national demonstration construction colleges. It is developed with specific work items as the carrier and work process as the guidance. The contents of the book are divided into five learning items, mainly including: basic knowledge of outdoor drainage pipes, slotted construction of outdoor drainage pipes, slotless construction of outdoor drainage pipes, auxiliary structure construction of outdoor drainage pipes and comprehensive training of outdoor drainage pipes.

References:

Baidu Encyclopedia of Outdoor Drainage Pipe