At present, the commonly used tube for floor heating radiation mainly includes aluminum-plastic tube, pe-x tube, pe-rt, etc., in which the aluminum-plastic tube is mainly used for radiator heating, pe-x, pe-rt and so on can be used for floor heating.
Among them, pe-x pipe is widely used in floor heating pipes due to its high cost performance, flexibility, convenient construction and good long-term pressure resistance under high temperature. It is the pipe with the largest amount of domestic floor heating market at present. Pe-x tube includes pe-xa, pe-xb, pe-xc three kinds, relatively speaking, pe-xb performance and cost performance are better than the other two kinds, in order to let you more detailed understanding of the advantages and disadvantages of each tube, the following three kinds of tube to do a simple comparison:
1. Pe-xa pipe: the production cost is relatively low. Pe-xa pipe adopts the peroxide crosslinking process, which is the previous generation of silane crosslinking process, and the intermolecular structure stability is relatively poor. Low density polyethylene (ldpe) is used as raw material for production. Although the pipe has good flexibility, it cannot guarantee the stability of crosslinking in the process of crosslinking and affect the service life.
2. Pe-xb pipe: there are only a few heating companies in the world that can produce this pipe technology. Heating companies with high production cost, reliable quality and strength often use floor heating pipes. Using domestic advanced silane crosslinking technology, the intermolecular structure is stable. At the same time, high-density polyethylene material is used, which is better than pe-xa tube in rigidity, heat resistance, wear resistance, surface smoothness and long-term use performance. 3. Pe-xc pipe: expensive equipment, few companies in the world can produce, high production cost, high pipe price, low cost performance ratio, rarely used in the heating consumer market. There are several kinds of pipes used for radiator heating pipes: domestic common aluminum and plastic pipe: this kind of aluminum and plastic pipe, generally used by small heating companies at present. Its aluminum layer is lap welding, aluminum layer thickness is not uniform, in the process of installation and tube expansion, easy to cause aluminum layer fracture, welding belt fracture. Inner layer is PE-XA material, thin thickness, tube expansion or high pressure, prone to deformation, tube explosion and other problems. Imported PE-XA pipe: PE-XA inner layer performance is the most unstable. Outer plastic oxygen barrier film, can not achieve oxygen barrier film effect, and easy to damage. No metal stable layer, full plastic tube, easy to deformation when heated. When water passes through at 80 degrees, the pipes are as soft as noodles. Representative brand: Germany ruihao imported PE-XB aluminum tube material: representative brand: Spain barron tree, is the best performance, the most cost-effective heating pipe. 1. The inner layer adopts pe-xb (cross-linked polyethylene) with a thickness of 2.3-3.0mm, which can overcome the problems of aluminum layer rupture and inner layer deformation during the installation and expansion of ordinary pipe. 2. Aluminum layer is used as the steady state layer to ensure the pipe heat without deformation and stable performance, which is guaranteed to be used for 50 years
3. The aluminum layer is formed in one time with uniform thickness, which overcomes the problem that the aluminum layer of ordinary aluminum-plastic pipe adopts lap welding and the welding belt breaks during the installation and expansion of pipe.
4, the section of the aluminum layer uniform thickness, compression does not deformation, overcome the common aluminum plastic pipe thin aluminum layer high pressure blasting problem.
5, the use of aluminum layer of oxygen resistance, truly achieve the effect of oxygen resistance, to overcome the outer layer of oxygen resistance in the construction process is easy to damage the problem. It is important to choose the pipe material after the expansion of the common aluminum-plastic pipe and the Spanish baren tree heating pipe, but the brand and quality of the pipe fitting should not be ignored, because the connection between the pipe material and the pipe fitting is more prone to water leakage, so how to choose the pipe fitting has become a problem of universal attention:
A, tube performance comparison of the current domestic steel tubes for PE, Xa, PE, Xb, all does not belong to environmental protection material and clean energy, and in the industry of floor heating, some manufacturers of pipe quality relative to the same products abroad gap is bigger, can't completely meet the specification requirements of the application of 50 years, the water temperature slightly higher (65-70 ℃) for a period of five years will start aging, caused by leakage accidents.
At present, domestic manufacturers are mostly using copper water collectors, copper products are very demanding on water quality, so in many projects in China often appear after running 2, 3 water collectors leakage events.
The advantage of PERT heating pipes
With the continuous improvement of the quality of life and the continuous development of the heating industry, more and more families begin to choose to install the heating system, but know little about the heating pipes.
- RT PE pipe, commonly known as heat-resistant polyethylene pipe is made of vinyl monomer and 1 - octene copolymer, and are specially designed for heating system and the density of ethylene/octene copolymer, which has a narrow molecular weight distribution, octene uniform distribution in polymerization of owner chain special molecular structure, it keeps the original PE health performance and machining performance advantages, and strengthened the high temperature durability of a new type of special pipe material. The pipes produced from this material are mainly used in the hot water/heating pipe field in buildings. Their durability is the same as the life of buildings, up to 50 years at the minimum, and they also have good recycling and high added value. Pe-rt is a new type of heating pipe.
The advantage of PERT heating pipes
1, compared with copper pipe, have qualitative light, relative density is only about 1/9 of the copper tube, long service life, 4 ~ 10 times of metal pipe, and the advantages of flexible and XPAP, PPR, PEX plastic pipe material, compared with hot melt connection, just meet the requirements of floor heating tube is not allowed to have joint, low temperature resistance and good flexibility, small bending radius can be five times to the pipe diameter, winter low temperature construction cold short and won't waste can be recycled and other advantages.
2. Its thermal stability and impact resistance are more satisfactory. Under the condition of 110℃ and 1.9MPa environmental stress, 8760 hours of aging test was carried out according to international standards. PE-RT tube has good cost performance.
3. The raw material of PERT heating pipe is a kind of medium density polyethylene with very stable mechanical properties, which is formed by catalytic copolymerization of monomers of ethylene and octene. So it does not need crosslinking in the process of production and processing, the production process is simple, easy to control, the quality of the pipe is stable and reliable, PERT floor heating pipe is currently the only kind of plastic pipe that does not need crosslinking, and can be in the water temperature of 60 degrees below the long-term hydrostatic performance.
4. At operating temperature > Its service life can be safely used for about 50 years when the pressure of 60℃ is 0.8mpa.
5. PERT floor heating pipes can also be repaired by hot-melt connection of pipe fittings after external damage. There is no joint at the connection point, which can greatly improve the connection quality.
PERT floor heating pipe is currently the most common use of floor heating pipe, choose good pipe can have good floor heating, good floor heating can enjoy a warm and comfortable life, from the first step of the purchase will be careful.