There are many kinds of materials for drain pipes, as an professional pipe manufacture, Madison Pipe will introduce how to select the drainage pipe materials for outdoor drainage pipes and drainage pipes in buildings.
The Material Selection of Drain Pipe
There are many kinds of materials of drain pipe, here we will introduce the selection of drainage pipe materials for outdoor drainage pipes and drainage pipes in buildings.
Outdoor Drainage Pipe
Concrete Pipe. This is a pipe that has been used for dozens of times. Practice has proved that in cities and towns, this kind of pipe has many shortcomings, such as:
- The sealing performance of the pipe is not good.
- The pipes have poor shear resistance, especially in cities with many people and vehicles.
The drainage pipes are located on both sides of the road. The pipes will break after a few years, especially on both sides of urban main roads with a buried depth of less than 1.0m. , This phenomenon is very common.
Rigid polyvinyl chloride (PVC-U) double-wall corrugated pipe
This is a pipe that has only been used since the 1990s. The pipe has good anti-corrosion performance and joint sealing performance, simple construction and low cost. The mechanical properties of this pipe are not very good, and the compression performance is average. It is used for drainage Pipes can only be used in places with branch pipelines and fewer vehicles.
Rigid polyvinyl chloride (PVC-U) pipes for underground sewage discharge are specially used as pipes for underground sewage discharge. The comprehensive performance is second only to polyethylene double-wall corrugated pipe.
Polyethylene HDPE double-wall corrugated pipe
This is a new type of pipe that has been put into use in recent years. It has many advantages such as good sealing performance, good compression resistance, and good corrosion resistance. It is also the most popular pipe material at present.
Drainage Pipes in Buildings
The drainage channel in the building has been proved through decades of practice: hard polyvinyl chloride PVC-U drainage pipes and flexible joint drainage cast iron pipes are more popular drainage pipes.
How Many Kinds of Outdoor Drainage Pipes are There?
There are 2 types of outdoor drainage pipes. One is polyethylene double-wall corrugated pipe, which has many advantages such as tightness, super pressure resistance and corrosion resistance.
The other one is rigid polyvinyl chloride, namely PVC-U, which has anti-corrosion performance and joint sealing. The performance of PVC-U is very good, the construction is simple and the cost is low, but its mechanical properties and pressure resistance are general. This drainage pipe can be used in branch pipelines and places with few vehicles, and it can also be used as buried sewage with deodorant effect.
- PVC-U Water Pipe PVC-U water pipes have smooth inner walls, low fluid resistance and excellent properties such as acid resistance, alkali resistance, and corrosion resistance and will not affect the water quality. They are low density, long service life, convenient construction and widely used in water supply and drainage projects, but its push-pull performance is relatively poor.
- PVC-U Double-wall Corrugated Pipe The cross-section of PVC-U double-wall corrugated pipe is a double-layer structure, its inner wall is smooth, water resistance is small, anti-corrosion performance and sealing performance are good, its weight is light, construction is convenient, and its ability to resist uneven settlement is strong. But its compression resistance is insufficient.
- PE Sewage Pipe The PE sewage pipe can be used at a temperature of ﹣60-60 degrees. Even if it is constructed in winter, there will be no water pipe brittleness. Its internal light and water flow resistance are small, and it also has good pit scratching ability. Corrosion resistance, sealing performance, wear resistance are good, and the service life is long.
What is the Buried Depth of Outdoor Drainage Pipes?
- The sewage pipeline must prevent the pipeline from being damaged due to ground load. Under the roadway, the minimum soil covering thickness of the pipeline is generally not less than 0.7 meters.
- The sewage in the pipeline must be prevented from freezing and damaging the pipeline due to soil frost heave. The top of the pipe can be buried 0.15m below the freezing line.
What is the Buried Depth of the Pipeline?
The buried depth of the pipeline refers to the vertical distance from the ground surface to the central horizontal axis of the pipeline. In order to protect buried pipelines from damage to ground facilities and vehicles, the pipe top covering soil is generally not less than 0.8m. Except for special circumstances, it is also required to bury the pipeline below the freezing line. In addition to meeting the above conditions, the appropriate burial depth should be determined by technical and economic comparison.
The transportation technology of the offshore oil and gas pipeline is similar to that of the land pipeline, but the construction method has its particularity. The investment cost per unit length of the ocean pipeline with the same pipe diameter is 1~2 times or more than that of the land pipeline, and the construction environment is complicated and changeable.
In the sea area less than 600m deep, large semi-submersible pipe-laying ships are currently used for marine pipeline laying operations. Pipes can be stacked on the ship, with lifting equipment for lifting and transporting the pipes and assembly of the pipes segmented and welded segment by segment. When the pipe-laying ship moves forward, the welded pipe section slides from the stinger at the stern to the seabed. There is a tension machine on the ship to clamp the pipe section so that it slides on the required route, and the pipe section slides down to the ship. The displacement distance is the same.