2021.07.03

What are the types of plastic water pipes?

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Plastic water pipe is made of high polymer, with light weight, health and safety, water flow resistance is small, save energy, save metal, improve the living environment, long service life, safety and convenience and other characteristics, by the pipeline engineering industry.

So what are the types of plastic water pipes?

First, hard polyvinyl chloride (PVC-U) pipe for water supply

(non-lead salt stabilizer)

PVC is polyvinyl chloride, PVC-U refers to hard polyvinyl chloride. Polyvinyl chloride is a type of plastic that is harmful to the human body due to the addition of lead salts in most of the production. Only a small part of the production without lead salt can be used as an environmentally friendly water supply pipe.

Appearance:

Features:

1) With high hardness, stiffness and allowable stress.

2) Good anti-aging ability, durable, life of up to 50 years.

3) Corrosion-resistant, cheap, easy to bond, self-extinguishing.

4) Recyclable, easy to install, good sealing.

PVC-U pipe for drainage

Pvc-u pipe is made of sanitary grade polyvinyl chloride (PVC) resin as the main raw material, adding an appropriate amount of stabilizer, lubricant, filler, color enhancer, etc. by plastic extruder extrusion molding and injection molding machine injection molding, through cooling, curing, shaping, inspection, packaging and other processes to complete the production of pipes and fittings. It is an ideal material for building water supply and drainage.

Appearance:

Features:

1) Excellent physical and chemical properties, chemical corrosion resistance, high impact strength, low fluid resistance, compared with the same caliber cast iron pipe flow increased by 30%, aging resistance, long service life, service life of not less than 50 years, is the ideal material for building water supply and drainage.

2) Light and durable, easy to install, effectively accelerate the progress of the project.

Third, buried drainage with PVC-U double-wall corrugated pipe

The hard polyvinyl chloride pipe for buried sewage and waste water is produced by extrusion molding with PVC resin as the main raw material and necessary additives. The hard PVC pipe used for buried sewage and wastewater can be divided into elastic sealing ring connecting pipe (φ110mm-φ630mm) and adhesive connecting pipe (φ110mm-φ200mm) according to different connection methods. Under the condition of considering the chemical resistance and heat resistance of the material, the pipe for buried sewage and wastewater can also be used as an industrial drainage pipe.

Appearance:

The inner and outer walls of the pipe are not allowed to have bubbles, sand holes, obvious impurities and irregular ripples. Both ends of the pipe shall be flat and perpendicular to the axis. The pipe color should be uniform. The inner and outer walls of the concave part of the pipe should be welded tightly, and the phenomenon of detachment should not occur.

Features:

1) Excellent flame retardant and impact resistance.

2) The inner wall of the product is smooth.

3) Outer wall corrugated, corrugated hollow structure, so that the product light weight, high ring stiffness.

Fourth, buried polyethylene (PE) pipe for gas

Buried polyethylene pipe for gas is extruded product made of special polyethylene as raw material. Safe to use, low leakage rate, with good corrosion resistance; Long service life, light weight, high strength, good toughness, convenient construction, wide application, large social benefits. It is mainly used for buried gas pipelines of natural gas and artificial gas.

Appearance:

Features:

1) The installation process is simple and easy to operate

There are two kinds of PE pipeline connection, one is electric fusion connection, generally applicable to pipe diameter less than De110; The second is the hot melt connection, which is generally suitable for pipe diameter not less than De110, and no sleeve fitting is required in the docking. The above two connection operation methods can be mastered in a short period of training, the welding quality can also be guaranteed, and the construction progress is fast. In addition, in the gas pipeline network that has been in operation, it is possible to open the three-way operation with gas, which is impossible to use steel pipe as the gas pipeline.

2) Anti-corrosion treatment, has strong corrosion resistance, buried in the ground long life

According to relevant literature, foreign PE buried after 60 years of use, dug out and re-welded, its welding and body quality can also meet the quality requirements of PE pipe; The PE pipe does not need to be treated with corrosion protection. The steel pipe is generally designed for 20 years.

3) Strong engineering adaptability

There are many professional pipelines in municipal engineering and residential district courtyards, and the pipe position is tense. In this complex construction environment, it has a kind of flexibility, and can be naturally bent and circumvented under the permitted radius of curvature.

4) Low investment cost

① The price of the pipe is currently commonly used gas steel pipe advantage is well known, large pipe diameter PE pipe, can use hot melt connection, save the cost of pipe fittings, and long life, no corrosion, its comprehensive price is lower than the investment in steel pipe.

(2) PE pipe flexibility is strong, it can be prefabricated on the ground, and then put into the pipe trench, there is no need to do the work pit, so the amount of soil of PE pipe construction pipe trench is smaller than that of steel pipe construction pipe trench.

5. PE pipes for water supply

PE (polyethylene) material is widely used in the field of water supply pipe manufacturing because of its high strength, corrosion resistance and non-toxic characteristics. Because it will not rust, it is an ideal pipe to replace ordinary iron water pipes. China's plastic pipe development is fast, the quality is constantly improving. Due to its unique advantages, polyethylene PE pipe is widely used in building water supply, building drainage, buried drainage pipes, building heating, transmission pipes, electrical and telecommunications protection bushings, industrial pipes, agricultural pipes and so on. It is mainly used in urban water supply, urban gas supply and farmland irrigation.

Appearance:

Features:

1) Corrosion resistance

Polyethylene has excellent corrosion resistance, good health properties and long service life.

Polyethylene is a non-inert material, in addition to a small amount of strong oxidants, can resist a variety of chemical erosion, and is not easy to breed bacteria. The service life of polyethylene pipe is more than 50 years.

2) Flexibility

Polyethylene has unique flexibility and excellent scratch resistance.

The flexibility of polyethylene piping system has great technical and economic value. The flexibility of polyethylene is an important property, which greatly enhances the value of the material for pipeline engineering. Good flexibility allows the polyethylene pipe to be rolled and supplied in a longer length, avoiding a large number of joints and fittings.

PE double-wall corrugated pipe for buried drainage

PE double-wall corrugated pipe for buried drainage is a kind of polyethylene as raw material, processed by extrusion and special molding process, the inner wall is smooth, the outer wall is closed corrugated type of a new light pipe, good performance, excellent quality, suitable for all kinds of projects, widely used in municipal sewage drainage, farmland/garden drainage and irrigation, buried drainage outside buildings. Mine, tunnel ventilation, drainage, communication cables, optical cable protective cover, all kinds of roads, stadium drainage.

Appearance:

1) The color of the inner and outer layers of the pipe is uniform, and the outer layer is generally black;

2) The outer wall of the pipe is not allowed to have bubbles, dents, obvious impurities and irregular ripples;

3) Both ends of the pipe should be flat, perpendicular to the axis and located in the trough area.

Features:

1) Aging resistance, corrosion resistance, long service life;

2) The inner wall is smooth, the flow resistance is small, no scaling;

3) Good sealing, not easy to leak;

4) Seismic, impact resistance;

Seven, PE winding structural wall pipe

The high density polyethylene resin is the main raw material, and the product is made by hot winding forming process, and the welding quality is excellent. Unique socket welding connection technology to ensure zero leakage of the interface; The pipe fittings have strong supporting capacity, and can form a perfect and zero leakage pipeline system. It is widely used in various soil environments, underground stormwater pipe networks, underground pipe corridors and stormwater collection systems laid in different depths.

Appearance:

Features:

1) Strong resistance to chemical corrosion and erosion.

2) Good flexibility and strong impact resistance.

3) Cold resistance, aging resistance, simple connection, safe and reliable.

4) Light weight and convenient construction.

5) Strong wear resistance, service life of more than 50 years, and maintenance free during the life span.

6) Superior drainage performance, good hygiene, recyclable.

Eight, PVC electrical sleeve

PVC single wire pipe

PVC single wire pipe is dedicated to the load-bearing wall, 8mm pipe diameter can minimize the transformation of the load-bearing wall.

PVC bellows

PVC corrugated pipe is suitable for small space wiring such as ceiling ceiling, with its own ductility and bending freely.

PVC red blue electrical bushing

PVC red and blue electrical bushing red and blue shunt, strong and weak electricity, better regulate circuit installation and maintenance.

PVC three-pronged pipe

The PVC three-pronged pipe is directly divided into partitions on the inner wall of the pipe, and the cable direction and pipe diameter utilization rate within each partition are specified, so as to facilitate the division of the line and avoid short circuit.

Appearance:

In practical application, the color of the home improvement pipe is distinguished: red is strong electricity, blue is weak electricity, and white is general electrical bushing, and it is more convenient to distinguish the line and branch direction of each room.

Article source: pipe network

Advantages and disadvantages of plastic pipes

Temperature resistance of various plastic pipes

In recent years, plastic pipe accidents occur frequently, and people always attribute the cause of the accident to the quality of the product and think that the quality of the pipe is unqualified. Facts have proved that the vast majority of plastic pipeline accidents are caused by improper design or construction, and construction in strict accordance with specifications is the guarantee of long-term safe operation of plastic pipeline projects.

Below is a group of photos of pipe damage caused by improper design or construction:

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