What is the difference between aluminum plastic pipe and aluminum plastic pipe?

Answer: People who are not familiar with PPR plastic aluminum steady state pipe fittings may not be able to distinguish the gap between pipes, and they are not clear when they hear the name, number, specification and size of pipes. In order to save costs, many manufacturers use PE material for the outer layer of Wentai pipe, and some mix benzene material in PPR material, so brand products must be used when choosing pipes.

Products that look similar are actually very different. The structure and purpose of pipes are also very different. For example:

There is a difference between PPR plastic aluminum steady state pipe and PPR aluminum plastic pipe, and ordinary PPR aluminum plastic pipe is a multilayer pipe composed of three materials with great difference in Young's modulus: cross-linked polyethylene material, polypropylene material and aluminum; PPR plastic-aluminum steady-state pipes generally refer to multi-layer pipes composed of two or more layers of thermoplastic and one layer embedded in the metal layer. PPR plastic aluminum steady state pipe is a composite pipe composed of PPR pipe and alloy aluminum layer.

Ordinary PPR aluminum-plastic pipe in the middle, before the hot melt connection, the end face of the pipe is capped, relying on the rubber ring in the cap to seal to prevent water from penetrating and corroding the aluminum foil, this sealing method is unreliable, once the aluminum foil is in contact with water, it will corrode, the main structural layer will be destroyed, there may be a pipe burst, and the safety of the pipeline system is not guaranteed. Due to the high thermal conductivity of the aluminum layer in the ordinary PPR aluminum-plastic pipe, the heat is transferred along the axial direction during hot-melt welding, and the melting time varies greatly under different environments and tube length conditions, which is not easy to master. In the use of PPR plastic aluminum steady state pipe projects across the country, there has not been a single case of quality accident due to pipe connection leakage.

PPR steady-state pipe connection is reliable and safe: in the hot water circulation application of radiator heating, the heat medium water is alkaline, which is very corrosive to the alloy aluminum foil, and the aluminum layer of the pipe is not allowed to contact the circulating hot water in engineering applications. PPR plastic aluminum steady pipe adopts hot melt connection, before connection, use a special tool to peel off the plastic aluminum composite layer covered by the pipe, the size of the inner pipe meets the requirements of the standard pipe series, the hot melt method is the same as PPR, the aluminum layer does not contact the heat medium water at all, the joint is firm, the safety is high, the operation is convenient, and it is not easy to leak.

PPR plastic aluminum steady state pipe does not shrink the diameter, and the pipe system resistance is small: the PPR plastic aluminum steady state pipe fittings and pipe fittings are connected by socket type hot melt, which does not require any accessories, and the connection is not reduced in diameter, and the hydraulic calculation can be carried out according to the normal procedure, and the pipe network is not easy to produce water blockage during use. Before the ordinary PPR aluminum-plastic pipe is hotmelted, the pipe end needs to be capped and sealed, the diameter of the connection is reduced, and each contact forms a water resistance, and the flow rate is reduced during the operation of the pipe network, which cannot meet the design requirements.

Taking DN20 pipe as an example, the circulation area is reduced, the circulation capacity of the pipeline is greatly reduced, the local resistance of the pipeline system will be more than 2 times that of the normal situation, and the operating efficiency of the heating system will be greatly reduced under the same pump and pipeline system conditions, and the heating effect will not be guaranteed. If the diameter of the pipe is increased, the investment cost will increase; If higher operating pressures are used, long-term operating costs will be greatly increased. Shenzhen Manatee Pipe Industry is a professional manufacturer of PPR steady state pipes, with reasonable PPR steady state pipes and quality assurance.

There is no difference, maybe the name is different.

1. Advantages of aluminum-plastic pipes:

Aluminum-plastic pipes are lightweight, durable and easy to construct, and their bendability is more suitable for use in home decoration. The inner and outer layers of the aluminum-plastic pipe are made of special polyethylene material, which is clean, non-toxic, smooth, and can be used for more than 50 years. The middle aluminium layer is 100% insulated from gas permeation and gives the tube the advantages of both metal and plastic pipes.

Second, the main disadvantages of aluminum-plastic pipes:

When the aluminum-plastic pipe is used as a hot water pipe, due to long-term thermal expansion and contraction, the pipe wall will be misaligned and cause leakage.

Identification of aluminum-plastic pipes

Randomly select a section of aluminum-plastic composite pipe, hit it with something relatively hard, the pipe surface will be bent, if it is deformed to crack, it is inferior; If the deformed surface cannot be restored, it is a general texture; After deformation, it can be restored to its original shape immediately, and it is a high-quality aluminum-plastic pipe.

The color of high-quality aluminum-plastic pipe is uniform, there is no color difference, and the roundness is less than; The middle aluminum layer has a tight interface and no rough traces; The inner and outer surfaces are smooth and smooth, and there can be no obvious scratches, depressions, bubbles, dead materials, and buslines.

Take a section of aluminum-plastic pipe squared and cut it vertically, and put your fingers into the pipe, the nozzle of the high-quality pipe is smooth and there is no feeling of texture; The nozzle has no burrs.

1. The aluminum-plastic pipe produced by Netcom Pipe Industry is connected in the same way as PPR pipe, no need to peel the skin during installation, and it is connected with PPR pipe fittings of the same material for hot melt connection, which is firmly connected without leakage, ensuring the integration of pipes and pipe fittings.

2. Aluminum-plastic pipe is resistant to high temperature, high pressure and low temperature. It is mainly used for hot water pipes, and will not cause the problem of pipe wall dislocation and water pipe leakage due to long-term use.

3. Outstanding health performance, the inner and outer materials of the aluminum-plastic pipe, environmentally friendly and non-toxic, in line with the requirements of human health, the aluminum layer in the middle can not only block light, but also block oxygen. As we all know, endophytic microorganisms must have light and aerobic, and the middle aluminum layer of the aluminum-plastic pipe can prevent the breeding of microorganisms and algae plants, and will not produce scale.

4. Long service life, the innovative aluminum-plastic pipe of Netcom pipe industry belongs to the oxygen barrier pipe, the aluminum layer blocks oxygen, the sun protection prevents the water pipe from aging, and the service life in the outdoor is higher than that of other pipes, the light sealing performance is good, the reasonable use, and the pipe is more than 50 years.

The long-term working temperature should not exceed 110 °C; The length of each section is limited, and it can be slightly bent, but not excessively bent for construction; It is mainly used as a hot water pipe, and it is used as a cold water pipe. The production process of aluminum-plastic pipe is better than that of PPR all-plastic pipe, and the price is slightly higher.

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We're glad to answer your questions! The advantages of aluminum-plastic composite pipe are lightweight, durable and convenient to construct. Extended Materials.

1. Outstanding health performance: The inner and outer layers of the aluminum-plastic pipe are made of special polyethylene material, which is clean and non-toxic. The most important thing is that the middle layer of the aluminum-plastic pipe is aluminum, which can not only block light, but also block oxygen.

As we all know, the environment of the sinister microorganisms must be light and aerobic. The middle aluminum layer of the aluminum-plastic pipe prevents the breeding of microorganisms and algae plants, which is beyond the reach of the all-plastic pipe. Not only does the plastic pipe add a large number of antioxidants to prevent the degradation of the material, and the antioxidants are extracted into the water retained in the pipeline, which is easy to cause water pollution, but also because there is no light-blocking and oxygen-blocking material in the all-plastic pipe, it is easy to cause secondary pollution of water quality due to microorganisms.

2. Excellent high and low temperature resistance: long-term use temperature of 95 degrees (50 years, IMPA), maximum use temperature of 110 degrees, and the thermal expansion coefficient of aluminum-plastic pipe is small. It has a coefficient of thermal expansion comparable to aluminum, which is only one-sixth of that of all-plastic pipes.

When subject to temperature changes, the deformation is small, and the aluminum-plastic pipe is a flexible coil, and the pipe itself can digest a certain amount of deformation, which will not cause the thermal expansion and deformation of the pipeline system. However, the high and low temperature resistance of all-plastic pipes is relatively poor. The long-term use temperature of PPR is only 70 degrees (50 years, IMPA) and the maximum use temperature is 95 degrees.

At the same time, the expansion coefficient of PPR pipeline is larger, and when the external water temperature (hot and cold water) changes, there is a large amount of original deformation, because the PPR pipe is a rigid straight pipe, it cannot digest the deformation, so it is easy to cause the system to bend and deform and even leak. I hope I can help you! [Open the potato heart].

Aluminum-plastic pipe is a perfect combination of metal pipe and plastic pipe, which integrates the advantages of metal and plastic pipe and shows excellent performance. So what are the performance characteristics of aluminum-plastic pipes?

The role of aluminum-plastic pipes.

Aluminum-plastic pipe is a popular pipe on the market, which is lightweight, durable and easy to construct, and its bendability is more suitable for use in home decoration. The main disadvantage of aluminum-plastic pipe is that when used as a hot water pipe, long-term thermal expansion and contraction will cause dislocation of the pipe wall and cause leakage.

The inner and outer layers of the aluminum-plastic pipe are made of special polyethylene material, which is clean, non-toxic and smooth. It can be used for more than 50 years. The middle aluminium layer insulates 100% from gas permeation and gives the tube the advantages of both metal and plastic pipes, eliminating the disadvantages of each.

Polyethylene is a non-toxic, odorless plastic, with good impact resistance, corrosion resistance, weather resistance. The middle layer of longitudinal welding aluminum alloy makes the pipe have the compressive strength of metal, and the impact resistance makes the pipe easy to bend.

Aluminum-plastic pipes can be divided into ordinary drinking water pipes, high-temperature resistant pipes, and gas pipes according to their uses

1. Aluminum-plastic composite pipe for ordinary drinking water: white L logo, scope of application: domestic water, condensate, oxygen, compressed air, and other chemical liquid pipelines.

2. Aluminum-plastic composite pipe for high temperature resistance: red R logo, mainly used for hot water and heating pipeline system with long-term working water temperature of 95.

3. Aluminum-plastic composite pipe for gas: yellow Q logo, mainly used for transporting natural gas, liquefied gas and gas pipeline system.

4. When the pipeline is constructed, it must comply with the corresponding technical regulations.

Product characteristics: Aluminum-plastic pipe has the same strength as metal pipe, and is easy to bend, eliminating the brittleness of metal pipe, and not bending it;

High temperature resistance (expansion coefficient: mm m·) high pressure resistance, corrosion resistance, excellent performance, can be used for cold and hot water and other fluid transportation; The inner wall of the pipe is smooth, and the resistance is small when transporting fluid, and the ability of this pipe to transport fluid is 30 greater than that of metal pipe with the same diameter;

It has flame retardant properties and can convey flammable and explosive gases and oils.

Description of use:1Aluminum-plastic pipes for hot and cold water are used in the plumbing system of hot and cold water in buildings, including central heating systems.

2.Aluminum-plastic pipes for hot and cold water are used in purified water supply systems for direct drinking.

3.Aluminum-plastic pipes for hot and cold water are used in ** (centralized) air conditioning systems.

4.Aluminum-plastic pipes for hot and cold water are used for industrial purposes such as conveying or discharging chemical media.

5.Aluminum-plastic pipes for hot and cold water are used in the heating system of buildings, including floor, siding heating and radiant heating systems.

Aluminum-plastic pipe belongs to a kind of pipe, this kind of pipe is divided into five layers, the middle layer is aluminum, the inner and outer layers are made of plastic, the inner and outer layers are closely combined with the middle layer through adhesives, and have the advantages of strong pressure resistance, corrosion resistance, clean and non-toxic, light weight, long service life, impact resistance, good high and low temperature resistance, and good toughness. However, this kind of pipe also has shortcomings, for example, when the aluminum-plastic pipe is used as a hot water pipe, the pipe wall may be misaligned due to thermal expansion and cold contraction.

What are the classifications of pipes.

By production method.

1) Seamless pipes - hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, pipe jacking.

2) Welded pipes. a) According to the process - arc welded pipe, resistance welded pipe (high frequency, low frequency), gas welded pipe, furnace welded pipe.

b) According to the weld - straight seam welded pipe, spiral welded pipe.

By section shape.

1) Simple cross-section steel pipe - round steel pipe, square steel pipe, oval steel pipe, triangular steel pipe, hexagonal steel pipe, diamond-shaped steel pipe, Bu Huihui octagonal steel pipe, semi-circular steel circle, others.

2) Complex cross-section steel pipes - unequal hexagonal steel pipes, five-petal plum blossom-shaped steel pipes, double-convex steel pipes, double-concave steel pipes, melon-shaped steel pipes, conical steel pipes, corrugated steel pipes, case steel pipes, etc.

By caliber. According to the caliber, it can be divided into large-diameter seamless steel pipe and small-diameter seamless steel pipe.

By wall thickness. According to the wall thickness, it can be divided into thin-walled steel pipe and thick-walled steel pipe.

By use. Steel pipes for pipelines, steel pipes for thermal equipment, steel pipes for machinery, steel pipes for petroleum and geological drilling, steel pipes for containers, steel pipes for chemical industry, steel pipes for special purposes, etc.

1) Pipes for pipes. Such as: seamless pipes for water, gas pipes, steam pipelines, oil transmission pipes, and pipes for oil and gas trunk lines. Agricultural irrigation faucets with pipes and sprinkler irrigation pipes, etc.

2) Tubes for thermal equipment. Such as boiling water pipes, superheated steam pipes for general boilers, superheated pipes, large smoke pipes, small smoke pipes, arch brick pipes and high-temperature and high-pressure boiler tubes for locomotive boilers.

3) Pipes for the machinery industry. Such as aviation structure pipe (round pipe, elliptical pipe, flat elliptical pipe), automobile half shaft tube, axle tube, automobile tractor structural tube, tractor oil cooler pipe, agricultural machinery square pipe and rectangular tube, transformer pipe and bearing tube, etc.

4) Pipes for petroleum geological drilling. Such as: oil drilling pipe, oil drill pipe (square drill pipe and hexagonal drill pipe), drilling straight, oil tubing, oil casing and various pipe joints, geological drilling pipe (core pipe, casing, active drill pipe, drilling straight, hoop and pin joint, etc.).

5) Pipes for the chemical industry. Such as: petroleum cracking pipes, chemical equipment heat exchangers and pipelines, stainless acid resistant pipes, high-pressure pipes for fertilizers and pipes for transporting chemical media, etc.

6) Other departments with pipes. Such as: container tubes (high-pressure gas cylinder tubes and general container tubes), tubes for instrumentation, watch shells, injection needles and medical devices, etc.

Aluminum-plastic pipe is a kind of composite pipe made of longitudinal welded aluminum pipe in the middle, lined with polyethylene plastic inside and outside, and bonded with hot melt adhesive between layers. According to the use, there are ordinary drinking water pipes, high-temperature resistant pipes, and gas pipes. The aluminum-plastic composite pipe for gas has a yellow Q logo, and is mainly used for transporting natural gas, liquefied gas and gas pipeline systems.

Because the middle layer of aluminum-plastic pipe is aluminum, it can avoid the penetration of gas into the plastic, so it is more suitable for gas pipelines.

Pipe fitting collapse is the part that connects the pipe into a pipeline.

The common materials of special pipe fittings for plastic and aluminum pipes are plastic trillion materials, stainless steel, and copper. Because the mechanical strength of metal pipe fittings is usually higher than that of plastic products, they are more used in gas systems. Due to the great difference in the material and performance of stainless steel products, copper products with stable performance are usually used in the absence of material selection (specimation) and identification of materials.

In the installation and use of aluminum-plastic pipes, small radius bending should be avoided as much as possible to prevent the cracking of the aluminum pipes; At the same time, it is avoided to bury the connecting pipe fittings in the wall and underground to facilitate inspection and maintenance.