With the continuous progress of society, pe water supply pipes are used in large quantities in our daily lives. Since pe water supply pipe materials do not rust, it is an ideal pipe to replace ordinary iron supply pipes. The pe water supply pipes are widely used in many fields such as construction water supply, buried drainage pipes, building drainage, gas pipelines, building heating, industrial pipes, electrical and telecommunication protection casings, and agricultural pipes. I believe that everyone will not be unfamiliar with the pe water supply pipe, but it is not too familiar with the price and connection method of the pe water supply pipe. Do not worry, the following is my specific introduction to the pe water supply pipe material and pe water supply pipe connection, I hope everyone has a reference.
Pe water supply pipe material
Before understanding the price list of pe water supply pipes, we first come to know what advantages pe water supply pipe materials have, and pe water supply pipes have good hygienic performance, excellent corrosion resistance, and long service life during use. The pe water supply pipe is non-inert material and can resist the erosion of various chemicals except a small amount of strong oxidants. The main reason that steel pipes and cast iron pipes are replaced by pe water pipes is not only because pe water pipes live longer than other water pipes. Low energy consumption, low resistance to water flow, light weight, easy and quick installation, long life, low cost, and heat preservation function, the most important must be because the pe water supply pipe is not easy to breed microorganisms during use.
Pe water supply pipe market
With the rapid economic development, the pe water supply pipe has a very strong development potential in the market. Due to the large market demand for pe water supply pipes, the pe water supply pipe also shows a good development trend in price. China's pe water supply pipe The application is very extensive, because pe water supply pipe has many advantages to be applied: building drainage, gas pipeline, electrician and telecommunication protection casing, building heating, building water supply, industrial pipe, agricultural pipe, buried drainage pipe, city Water supply, urban gas supply, farmland irrigation and many other fields, the following is a detailed introduction of the pe supply water price list.
Pe water supply pipe use regulations
General provisions
1 Pipes and fittings shall have the product quality inspection report of the quality inspection department and the certificate of the manufacturer.
2 When pipes are stored, handled and transported, non-metallic ropes are used to tie the ends of the pipes.
3 When pipes, fittings are stored, handled and transported, they shall not be thrown or hit by impact.
4 During storage, handling, and transportation of pipes and fittings, exposure to sunlight and rain shall not occur; they must not be exposed to oil, acid, salt, or other chemical substances.
5 The storage period between production and use of pipes and fittings should not exceed one year.
Material acceptance
1 Receiving pipes and fittings must be checked and accepted. Firstly accept relevant information such as product instruction manuals, product certifications, quality assurance documents, and various performance inspection and acceptance reports.
2 When accepting pipes and fittings, they should be sampled in the same batch and inspected according to the current national standard "PE (polyethylene) for water supply" for dimensional and visual performance inspections. A comprehensive test should be conducted when necessary.
Storage
1 Pipes and fittings should be stored in well-ventilated warehouses or simple sheds that do not exceed 40°C.
2 Pipes should be stacked horizontally on flat supports or on the ground. The stacking height should not exceed 1.5 meters. When the pipes are bundled into 1mx1m square bundles and the two sides are supported with supports, the stacking height can be properly increased, but should not exceed 3m. Pipe fittings should be stacked one on top of the other to ensure that they do not collapse, and it is convenient. Take and manage.
3 Pipes and fittings should be covered when they are temporarily stacked outdoors.
4 Pipes of different diameters and different wall thicknesses should be stacked separately when pipes are stored.
Handling
1 Pipes must be lifted with non-metallic ropes.
2 Pipes and fittings should be handled carefully and neatly arranged. Do not drop or drag along the ground.
3 When handling pipes and fittings in cold weather, severe impact is strictly prohibited.
transport
1 When the vehicle transports pipes, it should be placed on the bottom of the flat car. When it is shipped, it should be placed in a flat cabin. When transporting, the full length of the straight pipe should be supported and the coils should be stacked neatly. Both the straight pipe and the coil should be bundled and fixed so as to avoid mutual collision. The stacking contact should not have any sharp projections that may damage the pipe.
2 Pipes should be stacked neatly and securely when stacked.
3 Pipes and fittings shall be covered during transportation to avoid exposure to sunlight and rain.
PE water supply pipe connection method
Polyethylene pipe and pipe, pipe and PE pipe, pipe and fittings, and connection between polyethylene pipe and metal pipe are many, different connection methods have their own advantages and limitations, users can according to pipe diameter, work pressure , the use of places and other environments, select the appropriate connection. The most common connection methods for polyethylene pipes in urban water supply are: hot-melt connection, fused connection, socket-type flexible connection, flange connection, and steel-plastic transition joint connection.
1, hot melt connection
The hot melt connection uses a special heating tool to heat the polyethylene pipe or fitting to be joined under pressure, melt it, remove the heating tool, and apply pressure to connect the two melting surfaces together and maintain the pressure under stable pressure. For a while until the joint cools. Hot melt connections include hot melt butt connections, hot melt socket connections, and hot melt saddle connections.
2, fused connection
The fused connection is the use of special fused pipe fittings with built-in resistance wire in close contact with PE pipe or fittings. The PE pipe heats the connection through the embedded resistance wire and fuses it until it is cooled. The fused connection can be used to connect polyethylene pipes or socket fittings of different types and different melt flow rates. The fused connection is divided into an fused socket connection and an fused saddle connection.
3, socket type flexible connection
The polyethylene pipe socket type flexible connection is a new connection method developed based on the principle of socket-type flexible connection of cast iron pipes and polyvinyl chloride pipes (PVC-U). The PE pipe is welded at one end of the polyethylene pipe and reinforced. Polyethylene socket. The socket type flexible connection is a special socket that inserts one end of the polyethylene pipe directly into the pipe or pipe fitting, and presses the anti-pulling and rubber sealing ring to compress and seal through the locking ring in the socket to achieve the purpose of connecting the PE pipe and pipe fittings. .
4, flange connection
Flange connection is mainly used for the connection of polyethylene pipes and metal pipes or auxiliary equipment such as valves, flow meters, pressure gauges and so on. The flange connection is mainly composed of a polyethylene flange connection piece, a steel or aluminum back pressure live flange, a steel or aluminum flange piece, a gasket or a seal ring, a bolt, a nut, and the like. Flange connection is achieved by tightening the bolts and nuts so that the flange connection piece and the flange piece are in close contact.
5, steel plastic transition joint connection
The steel-plastic transition joint connection uses a steel-plastic transition joint prepared by cold pressing or other methods to connect the polyethylene pipe and the metal pipe. Steel-plastic transition joints have anti-pull locking rings and seal rings, which usually require good sealing performance and resistance to pull-out and pressure resistance greater than the polyethylene pipes in the system.
PE water supply pipe technical requirements
Although the current HDPE pipeline has been successfully applied in many fields, there are still several things to note in the use process:
1, welding: hot melt connection, the temperature must be 210 ± 10 °C, care should be taken to avoid overcharging.
2. Buried: When working in a trench, necessary safety measures must be considered.
3. Test: It is recommended to use water as the pressure test medium. During the test, measures should be taken to prevent the movement or damage of the pipeline.
4. Positioning: Polyethylene material can not be controlled by magnetic positioning equipment. Other methods can be used to detect polyethylene pipelines, including tracing lines, marking tapes, testing tapes, drawing line markings, electronic marking systems, and acoustic pipeline tracing methods. .
5, pressure: HDPE pipe can not be applied to the field of high pressure gas transmission.
6. Application range: HDPE pipes are not recommended for some occasions. Please consult your supplier for chemical resistance.
7. Electrostatics: HDPE pipes are mixed with high static electricity. In the case of flammable and explosive gases, appropriate measures should be taken to eliminate static electricity.
8, impact performance: HDPE pipe has good impact resistance, use a hammer to tap the pipe, should pay attention to the pipe will produce a certain amount of resilience.
9. Coiling: Coiled small-diameter HDPE pipes store energy like a spring. If you cut the packing Tape, it will produce a large rebound force.
10. Storage: If the pipes must be stacked and stored, excessive accumulation should be avoided and they should be stacked straight. If the pipes are not stacked properly, the pipes may be deformed.
11. Weight: Although the HDPE pipe is lighter than other conventional pipes, it still has a certain weight, so care should be taken in handling and construction.
12. Discharge: The correct discharge facility must be used and all Tools used for handling should be checked for compliance.
Editor's summary: The above is the relevant knowledge of pe water supply pipe material advantages PE connection method and technical requirements, municipal drinking water pipe color is blue or black, black pipe should have co-extruded blue color bar. There are at least three stripes along the longitudinal direction of the tube. Other uses of water pipes can be blue and black. Laying pipes (such as ground pipes) exposed to the sun must be black.
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