PB pipe product features
First, light weight, good flexibility, simple construction: PB pipe weight is 1 / 20 of galvanized steel pipe, easy to handle, the minimum bending radius is 6D. Second, the durability is good, non-toxic and harmless: due to its high molecular weight, stable molecular structure, in the absence of ultraviolet radiation, the service life is not less than 50 years, and it is non-toxic and harmless. Third, anti-freeze heat resistance: under the temperature of minus 20 ° C, has a good low temperature impact resistance, the pipe will not freeze crack. After thawing, the tube can be restored to its original condition; at 82 ° C, all aspects of performance remain very good. Fourth, the pipe wall is smooth, no scaling: the inner wall is smooth, compared with the galvanized pipe, can increase the water flow by 30%. 5. Advanced connection method: The connection mode is integrated hot-melt connection, so when the battery is buried, the movement of the pipe and the leakage of the joint due to temperature change and water hammer phenomenon can be avoided. Sixth, easy to repair: When the PB pipe is buried, it will not be bonded to concrete. In the event of man-made damage, quick repairs can be made through replacement piping.
Main application areas of PB pipelines 1. Hot and cold water pipes for tap water: pipes for direct drinking water projects. Second, heating pipe: can be used to connect radiators and other high-temperature heating systems, but also for floor, wall radiant heating and other low-temperature heating systems and air conditioning piping systems. Third, solar residential warm water pipes: used for warm water and heating pipes in solar homes. 4. Tubes for melting snow: Suitable for heating pipes for deicing and snowing under roads and parking lots. V. Industrial pipe: Because the material is resistant to chemical corrosion, non-toxic and tasteless, it can be used in chemical engineering, food processing and industrial water.
PB pipe connection technology PB pipe can be hot-melt connected, heated by special equipment, and pressed by hand or mechanically. This connection method avoids the leakage problem of the metal pipe connection, and the construction is convenient, safe and reliable.
Oxygen-blocking polybutene (PB) pipe
In the field of HVAC, PB pipes have superior properties unmatched by other plastics. However, the oxygen permeability of the polybutene pipe is slightly higher, and the oxygen in the hot water pipe is liable to corrode the metal pipe fittings and the like in the system, and is more disadvantageous for the high temperature heating system that connects the metal radiator. In addition, although the inner wall of the pipe is smooth and ensures no scaling, it has been proved that after 3 to 5 years of use, a very thin layer of biological slime adheres to the inner wall of the pipe, and after the layer of mud completely covers the pipe wall, the pipe wall It will speed up the diameter reduction, the water resistance is large, the water flow is sharply reduced, and the pipeline will be blocked for a long time. In addition, the cleaning of the pipeline is difficult, and it can only be cleaned by mechanical means, and other methods such as chemical methods cannot be cleaned. This is because the oxygen in the water causes the microbes to multiply, and the high oxygen permeability of the pipes means that the pipes will breathe and encourage the microbes to multiply. A large amount of dead microorganisms accumulate to form a biological slime. Therefore, oxygen barrier technology must be used to inhibit the proliferation of microorganisms, thus ensuring the safe use of pipelines.
There are currently two oxygen barrier PB pipes on the market, which use a very thin (only about 10 wire) ethylene-vinyl alcohol copolymer (EVOH) resin layer as the oxygen barrier layer. One is a three-layer co-extruded oxygen barrier PB tube, that is, a layer of hot melt adhesive and EVOH resin layer is uniformly coated outside the PB pipe. Because EVOH resin is easier to absorb moisture and the oxygen barrier capacity of EVOH resin after moisture absorption is greatly reduced, and the surface will be scratched during construction, the oxygen barrier effect will be reduced; the other is a five-layer co-extruded oxygen barrier PB tube. From the inside to the outside is PB-hot melt adhesive-EVOH-hot melt adhesive-PB, in which the inner layer PB is thicker, it plays a role of pressure, and the outer layer PB is thin, which plays a protective role. It is not difficult to see that this The pipeline is ideal, but the processing is difficult and the equipment cost is high.
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