Cast-iron sewage pipeline and its main types
To date, there are several types of pipes from this material. In order to make the sewer system correct, one must understand their distinctive characteristics.
- Pressure pipes. The abbreviated name is Ductile iron, which means "high-strength cast iron with nodular graphite";
- Pressure suction pipe. The abbreviated name is CHNR, which means "cast-iron pressure head";
- No-bore pipes( abbreviated SML);
- Non-pressure pipes Abbreviated name - Chek( sewer sewage);
Brief description of the pig iron sewage pipeline Ductile Iron
This type of product is produced by its modification with magnesium. During processing, mini-spheres of graphite are formed, which impart plasticity and strength to the material. The possibility of crack formation is minimized. This type of cast iron, in its properties, is similar to carbon steel.
Based on this, the CSH pipe is characterized by:
- elasticity;
- corrosion resistance;
- bending strength;
- impact resistance;
- adaptability to climate change.
Most of the time, the CSH pipe is used:
- For the construction of sewer networks;
- For supplying drinking water to the public;
- In pipelines operating under pressure( withstand up to 1.8 MPa);
- In drilling rigs;
- For transportation of gas;
- For transportation of oil.
Brief description of the pig-iron suction pipe pipeline of the ChNR
ChNR pipes are used, most often, when installing pressure systems in various industrial sectors. Unlike the metal equivalent, cast iron does not rust, which is their huge advantage. However, they are more fragile, which means that they can have additional problems with the installation. Cutting such a pipeline runs perpendicular to its axis. It is advisable not to exceed the deviation greater than 5 degrees.
In order to additionally protect the CNR pipes from corrosion, varnish-bituminous coatings are used, but without them the lifetime of the cast iron pipe can be more than 50 years. The CHR pipe is used both for underground and above-ground installation of heating systems, sewerage and water supply systems.
Brief description of SML
cast-iron sewer pipe SML SML pipe is manufactured by centrifugal casting method and is characterized by high graphite content. Its inner side is covered with an epoxy compound, so the probability of precipitation and layering inside the pipe is minimized. Increased parameters such as durability and stability, even when exposed to aggressive substances.
This product is characterized by high strength, low wear, shock resistance, acoustic comfort, incombustibility, corrosion resistance, ability to withstand high temperatures.
Brief description of a non-pressure cast iron sewage pipeline - CHK
The choke tube is made of gray cast iron, and its graphite has a plastic shape. Its strength is lower than that of the Ductile Iron Pipeline. The CHC pipe is used in environments where extreme loads are not anticipated. In addition, it is the socket. At one end of the pipe there is an expansion that ensures a qualitative and reliable connection to it of another pipe. Most often, cast-iron sewerage serves for drainage of household, domestic and sewage drains in small industrial and residential buildings. They are excellent to use in the suburban area, because they are durable. CHK pipeline can be installed together with plastic. Transition cuffs made of rubber will ensure reliable fastening at the joints. Such CHK pipes are easily dismantled and can be reused.
