Focusing on dedicated pipeline research and development for HVAC systems
All products adopt standard German craftsmanship
Establishing major R&D and production bases in Europe and Asia
WLLHOT, Germany
Silane cross-linked aluminum-plastic composite pipe (PEX-b/AL/PEX-b)
PEX-b/AL/PEX-b aluminum-plastic composite pipe uses butt welding or butt welding aluminum strip as the middle layer. The inner and outer layers are made of silane cross-linked polyethylene (PEXb) raw material. Special hot melt adhesive is used between the layers. Pipes formed by composite molding methods.
product description
PEX-b/AL/PEX-b aluminum-plastic composite pipe uses butt welding or butt welding aluminum strip as the middle layer. The inner and outer layers are made of silane cross-linked polyethylene (PEXb) raw material. Special hot melt adhesive is used between the layers. Pipes formed by composite molding methods. Since silane has a positive body structure, the ---OCH3 atomic groups at its three points can all participate in the reaction, that is, its ---OCH3 atomic groups can be connected to the long chain of polyethylene molecules, so the reaction product has a three-dimensional network structure. The comprehensive performance of physical and mechanical strength is relatively good, and the creep property is small. The Si-O-Si molecular bridge between its polyethylene molecular chains is not a C---C molecular bridge, so it is not susceptible to oxygen attack and has good thermal oxygen stability. Moreover, because it is a multi-point three-dimensional cross-linking, its cross-linking density is much higher than that of peroxide cross-linking product (PEXa) at the same degree of cross-linking. This greatly enhances its pressure resistance at high temperatures.
Product performance
Silane cross-linked polyethylene PEX-B/AL/PEX-B aluminum-plastic composite pipe complies with GB/T18997-1-2002 and GB/T18997-2-2002 national standards. The long-term working temperature is 95℃, the long-term maximum working pressure is 1.25MPa, and the burst pressure is 6-9MPa. Heat resistance: No deformation or stickiness at 200°C. The shrinkage rate is small. At 70°C, the shrinkage rate is about 0.1%. And it has passed the hydrostatic test at 110°C, ring stress 2.5MPa, and 8760h. According to the ISO/DIS9080 standard (GB/T 18252-2000), its service life is deduced to be 50 years.
Application scope
High-temperature radiator heating and floor radiant heating systems;
Hot and cold water pipes for production and domestic use;
Solar water heater piping;
Central air conditioning, fan coil units;
Oxygen, coal gas, and natural gas pipeline systems.
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