What are the advantages of cast iron drainage pipes?

High material strength: The flexible cast iron drainage pipe has good mechanical properties, and its tensile strength is greater than 150MPa according to the standard, while the tensile strength of the superior product specified in the UPVC pipe standard is only 43MPa. Its impact resistance and corrosion resistance are better than UPVC pipes.

Durability: The flexible cast iron drainage pipe formed by high-speed centrifugal casting has high tissue density, high strength, good corrosion resistance and aging resistance, and long service life.

Heat resistance: Flexible cast iron drainage pipes have good heat resistance and resistance to thermal deformation. The cast iron pipe itself can withstand thousands of degrees of high temperature, and the sealing rubber ring for pipe connection can be used normally without damage under the condition of continuous discharge at 70°C temperature and intermittent discharge at 120°C temperature.

UPVC pipes have poor heat resistance, and the service temperature is generally in the range of 0 60 °C. The expansion and contraction deformation of cast iron pipes when heated is only one-seventh of that of PVC plastic pipes. Suitable for high-rise building drainage pipes.

Quietness: The flexible cast iron drainage pipe can absorb the vibration and noise generated by the water flow due to its internal flake graphite structure of gray cast iron. The pipe wall is thicker than the UPVC pipe wall, which has a good sound insulation effect.

Pipes and fittings are linked by flexible rubber seals, which effectively weakens the transmission of vibration and noise. Therefore, the flexible cast iron drainage pipe has a good sound insulation and silent effect. The drainage noise of the flexible cast iron drain pipe is more than 10db lower than that of the UPVC drain pipe, which is the best quiet pipe.

The water supply cast iron pipe uses more than 18 No. 18 cast iron after adding nodularizing agent, and the pipeline is made by high-speed centrifugal casting of centrifugal ductile iron machine, ductile iron pipe has the essence of iron, the performance of steel, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, mainly used for water supply, gas transportation, oil transportation and so on in municipal, industrial and mining enterprises. It is the first choice for water supply pipes, and it has a high cost performance.

The flexible interface drainage pipe has strong flexural, telescopic deformation and seismic resistance, and has a wide range of applicability.

The rigid interface drainage pipe lacks the ability to withstand radial flexure, telescopic deformation and seismic resistance, and is prone to pipe rupture when it is subjected to external forces such as building deformation, thermal expansion and contraction, geological vibration, etc., resulting in leakage accidents, so it is gradually eliminated and only used in some low-rise buildings or special occasions.

Flexible seismic resistance: excellent seismic performance, can be applied to the seismic fortification of high-rise buildings, suitable for axial deformation caused by various factors in 35mm internal leakage, lateral vibration deflection up to mm without leakage. The flange pressure plate and rubber ring are flexibly connected, with good sealing performance, allowing swing in the range of 15° without leakage.

Low noise: irreplaceable quiet pipes create a comfortable living environment.

Strong fire resistance: The fire performance is recognized by the world.

High strength: impact resistance, corrosion resistance, no aging, high temperature resistance (thermal expansion and cold contraction is the universality of all kinds of drainage pipes, which is a factor that can not be ignored that may cause quality problems, and this product can withstand the continuous immersion of 70° general domestic sewage).

Renewable recycling: More than 95% of the used iron is smelted to become recycled iron and continue to be used, but also maintain the original characteristics of iron, cast iron pipe fittings can be 100% ** utilization, saving energy.

There are many types of materials, and the material of each material has its own advantages and disadvantages, as for which durability should be set up with many specific indicators, such as the environment, temperature, pressure, construction conditions and other elements of the use site, such as cast iron pipes (divided into water and water) are corrosion-resistant than galvanized pipes, and the pressure is strong, but the construction is cumbersome and the process requirements are high. The construction of plastic pipes is convenient and fast, but the resistance to high temperature and high pressure is poor. In short, it should be reasonably selected according to process requirements, use environment and economic benefits.

<> aluminum-plastic composite pipes and PPR pipes are used in solar water supply pipelines, they must be replaced after a few years, and they will be used for a long time unless they are coated with cotton. Domestic plastic pipes for water use, are there some brands of pipes that can be used for 50 years? Cast iron pipes and galvanized pipes are also not good in terms of domestic water, and there will be clogging problems after a long time, and they also have an impact on water quality.

Water is the key to good health! It can cause cancer, kidney damage, damage to the body's functional regenerative system, and affect growth (only drink cold water, not hot water, and it will become brittle in winter).

The aluminum-plastic composite pipe has low loss, the coil is easy to transport, can be cut arbitrarily, the installation is simple, and the construction is convenient. However, the fittings are pure copper, which is expensive. The inner diameter of the copper part is smaller than that of the aluminum-plastic composite pipe, and the diameter flow of the pipe is small, the thermal expansion and contraction effect is not good during installation, and it is easy to leak.

Pipelines are susceptible to damage by other professional construction processes, waste parts during maintenance, and high costs. The aluminum-plastic pipe is made of high-density polyethylene sandwiched with aluminum, and the melting point of polyethylene is 140, so its long-term high temperature resistance is good.

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Plastic pipes are corrosion-resistant, and there is no problem of rust, but the strength is poor, easy to be touched, squeezed and deformed, and even rotten, and not resistant to high temperatures, of course, the heat dissipation is also relatively poor, in winter, the plastic pipe will become brittle, if it encounters cold wave weather, it will even be frozen and cracked, the metal pipe is good polymetallic pipe, mainly the iron pipe is strong, not easy to deform, resistant to high and low temperature, but it is easy to rust after a long time Now the water pipe is still more than iron pipes, and the drainage pipes of buildings are more plastic pipes.

Galvanized water pipes are more durable, and old houses will use this kind of water pipes, which will not cause pollution and can ensure the quality and durability of water pipes.

I think that compared to these three types of water pipes, I think the second type is more durable, and it is not susceptible to corrosion.

What kind of pipes are used for drainage cast iron pipe fittings, which are suitable for new, expanded and reconstructed civil and industrial buildings, indoor and external pipe diameter of DN50mm DN300mm, and the internal pressure is not greater than the domestic drainage pipes, rainwater pipes, industrial production wastewater pipes and rain pipes without erosion.

When it comes to the design of the drainage pipe network, some people think that the ductile iron pipe is still very good, but when it comes to the design, I don't know what the reason is that the drainage pipe network does not use the ductile iron pipe? What are the advantages of ductile iron pipes? When designing, we pay great attention to the design of any details, after all, good design can bring good results, when it comes to the design of drainage pipe network, some people think that ductile iron pipe is still very good, but when you find that you don't need such a product when you design, I don't know what the reason is, after all, good design can facilitate our life.

So let me tell you the reason why the drainage network does not use ductile iron pipes? What are the advantages of ductile iron pipes?

Drainage pipe network does not use ductile iron pipes

The choice of pipes is decided by the local water authority, not by the design institute. Drainage pipes are widely used in reinforced concrete pipes and concrete pipes, and now plastic pipes are used more and more, and metal pipes are generally only used in special requirements, because metal pipes are expensive and have poor corrosion resistance. The drainage is generally not full flow, and the pressure is not large, so there is no need for a pressure resistance level as a metal pipe.

What are the advantages of ductile iron pipes?

1. Toughness, high strength and pressure resistance of centrifugal ductile iron pipes and corrosion resistance of gray cast iron;

2. The elongation of ductile iron pipe can reach more than 10, the tensile strength of centrifugal ductile iron pipe is greater than 420MPa, and the pressure value can reach more than 4 megapascals, especially the requirements of high-pressure water supply, gas pipeline system and high deformation capacity;

4 Ductile Iron PipeThe non-volatile chemical action of ductile iron pipe is supported by anti-corrosion measures such as spraying zinc and paint, which has excellent corrosion resistance and a service life of more than 100 years.

5. Ductile iron pipe is easy to install and economical in cost; High reliability: centrifugal ductile iron pipe has high bearing capacity and certain elongation, adopts flexible interface, axial deviation of 3 5 degrees, and will not produce the ability of medium to seep and leak, strong ** and prevent foundation settlement.

The above is the reason why the drainage network I introduced does not use ductile iron pipes? What are the advantages of ductile iron pipes? We have understood the ductile iron pipe, we know that the advantages of the ductile iron pipe are still many, no matter what kind of drainage pipe is used, it has its own plans and policies, of course, if you want to choose the right product, you must understand clearly.

Characteristics and advantages of cast iron pipe products used in water supply pipelines.

First: because the ductile iron pipe adopts flexible joints, the construction operation is more convenient, the construction efficiency can be improved, the construction conditions are improved, the construction cost is reduced, and most of the interfaces are connected by rubber rings, which is easy to operate, can shorten the construction period and reduce the construction cost.

Second: ductile iron pipe has the advantages of high water supply pressure, can resist external load and adapt to changes in geological conditions, pipe has high strength, good toughness, corrosion resistance, easy installation of flexible interface, strong seismic resistance, low labor intensity, etc., can be applied to poor geological sections and cross highways, without additional processing of steel pipes, coupled with strong corrosion resistance, can be applied to coastal and saline-alkali areas. At present, it is widely used in underground pipeline engineering.

Large-scale pipeline installation projects can better reflect its advantages of convenient installation and low labor intensity.

Third: ductile iron pipe has good sealing performance and is not easy to leak, which can reduce the leakage rate of the pipe network and reduce the daily maintenance cost of the pipe network.

Ductile iron pipe is mainly called centrifugal ductile iron pipe, which has the essence of iron, the performance of steel, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, mainly used in municipal, industrial and mining enterprises for water supply, gas transportation, oil transportation, etc. It is the first choice for water supply pipes, and it has a high cost performance. Compared with PE pipes, in terms of installation time, ductile ink pipes are simpler and faster to install than PE pipes, and the internal and external pressures are better after installation. From the perspective of airtightness and anti-corrosion, the airtightness of the ductile ink tube after installation is better, and the anti-corrosion performance can also be improved through a variety of anti-corrosion methods; From the perspective of hydraulic performance, because the specification of the ductile tube generally refers to the inner diameter, and the specification of the PE pipe generally refers to the outer diameter, because under the same specification conditions, the ductile tube can achieve a larger runoff; From the perspective of comprehensive installation and maintenance cost, ductile ink tube has a more superior cost performance.

The main components of ductile iron pipes are carbon, silicon, manganese, sulfur, phosphorus and magnesium. The inner wall is sprayed with zinc, cement mortar anticorrosive materials, etc.

1. The definitions are different.

Centrifugal cast iron drainage pipe is made of high-speed centrifugal casting, with dense structure, no slag inclusion porosity in trachoma, and smooth surface, while most of the ordinary traditional cast iron pipes are continuously poured or sand mold casting, without automatic molten iron temperature control device, controlled by manual experience, the wall thickness is often not uniform enough, the pipe is corrugated, the weight is heavy, and it is easy to have defects such as sand holes.

Cast iron drainage pipes really rose as an industry after the reform and opening up. At that time, China's infrastructure construction was vigorous, the city was changing with each passing day, and the use of drainage pipes was very large. At that time, China's cast iron drainage pipe was mainly hand-turned, and the production technology was backward, with the exposure of the quality defects of hand-turned cast iron pipes, as well as the introduction of beautiful and lightweight plastic pipes such as substitute PVC into the market, the cast iron pipe market declined.

2. The performance is different.

Centrifugal cast iron drainage pipe has the characteristics of non-flammability, non-toxicity, corrosion resistance, low noise, light weight, seismic resistance, easy installation, and small expansion and contraction coefficient. Compared with other metal pipes and plastic pipes, cast iron drainage pipes have some unique advantages, mainly reflected in high strength, low noise, long life, flame retardant and fire retardant, flexible and seismic resistance, no secondary pollution, renewable recycling, etc.

3. Different production methods.

The flexible cast iron drainage pipe is composed of three parts: straight pipe, pipe fittings and accessories, which can become flexible, and lies in the joint part between the straight pipe and the straight pipe, which is assembled with pipe fittings and accessories, and its length and bending can be adjusted arbitrarily according to actual needs to meet the requirements of on-site installation.

Centrifugal cast iron drainage refers to the straight pipe used for drainage, and its production process is prepared by metal mold centrifugal casting. Because the metal centrifugal casting has the characteristics of dense tube structure, smooth surface, uniform wall thickness, stable size and high production efficiency, the vast majority of enterprises adopt this production method.