Types of Non-Plastic Pipes Used for the Sewer Lines
A pipeline is as important as any other fixture in the sewage system. These pipes act as the vein to an interconnect system. Though the composition of the pipes may differ from one place to the other, it is essential that they hold the capacity to withstand internal and external pressure, deteriorating factors, structural imperfections and other problems that are caused intentionally and unintentionally for the sewer line to keep functioning the way it should be. To this purpose, the composition of the pipes should be thought thoroughly. What pipes can withstand the corrosive factors of the soil? What pipe materials can last longer? What pipe composition can best convey the wastewater without risking environmental pollution or serious health risks?
All these factors must be considered. That is the reason why there is myriad of pipes moulded from different materials so they can cater to the needs of the society. Here are the pipe variations that are popular in sewer system use:
Note that in this list, you will get to know the non-plastic pipes that have been and/or are used in the sewage system.
This type of pipe is used mainly in public sewers where the diameter of the pipe needs to be bigger than the average. The advantage with this type of material is that the size and shape of the pipeline can be completely customized and moulded to the preference of the contractor or the homeowner. However, this material is rarely used in private sewage systems these days. The disadvantage is that its upfront cost is way higher than normal, the work progress is relatively slow and the space required for this type of sewer is vast. Another setback is that the outer surface of the sewer line needs to be plastered with mortar using sulphate resistant cement while the inside needs to be covered with mortar and high alumina cement or polyurea coating.
Concrete pipes are more common as sewer pipes than bricks. One advantage they can give is that they provide the required strength with ease, there is a wide variety of pipe sizes that the customer can choose from and that the backfilling process is less delicate.
- Precast Concrete
This pipe is use doe gravity flow, is plain in construction and reinforced in composition. The thickness of the reinforces pipe varies from 25mm to 215mm while the plain is in between 25mm to 35mm.
- Cast-in-site Reinforced Concrete
These pipes are constructed where they are more economical and non-standard sections are required. They can come in handy when the sewers require a specific shape but there is limited working space.
- Stoneware or Vitrified Clay
Vitrified pipes come in 90-cm cuts and are required for caulking joint with the yarns that are soaked in cement mortar and packing in spigot and socket joints. There are two main classes of this pipe; AA and A. The pipes are resistant to acid, erosion and stress caused by pressure inside and outside the lines.
- Asbestos Cement
The size of these pipes range from 80 mm to 1000 mm. They are non-corrosive and provide good flow to the wastewater while being light weight. With non-corrosive effects in most soil types and has the allowance to mechanical joints up to 12 degrees.
- Cast Iron
This pipe is available in 80 mm to 1050 mm with protective coatings and flanged joints. They are designed to withstand fluctuating temperature, heavy load and pressing external stress. The disadvantage is that they are prone to acid-caused corrosion and that there are specific materials set for internal and external coatings for better performance.
These pipes are used as sewer mains, under river crossings, under bridge foundations and necessary connecting pumping stations as well as other situations that require sturdy and dependable pipelines.
- Ductile Iron Pipes
These are made through a metallurgical process that involves adding magnesium into molten iron that has low sulphur content. The pipe has excellent machinability, resistance against pressure as well as high wear and tear tolerance and corrosive factors.