The hard-chloride vinyl pipe for building drainage is abbreviated as UPVC or PVC-U drain pipe. It is based on PVC resin as the main raw material, adding appropriate amount of filler, and suitable additives. Such as stabilizers, modifiers, lubricants, etc., extruded from the extruder formed.
UPVC drainage pipe in China's plastic pipe industry accounted for about 50% of the production, in Europe, UPVC pipe accounted for 60.6% of the plastic pipe market, of which UPVC drainage pipe accounted for 46.3% of the world plastic pipe market.
UPVC pipe has the following characteristics: good chemical resistance; self-extinguishing and flame retardant; good aging resistance, the same between -15 °C -60 °C for 30-50 years; good electrical properties, volume resistance 1 ~ 3×1015Ω/cm3, breakdown voltage up to 23~28Kv/mm; smooth inner wall, small internal surface tension, it is difficult to form scale, the fluid transport capacity is 43.7% higher than cast iron pipe; lighter than steel pipe, iron pipe, it is easy to expand , Adhesion, bending, installation work for the public steel pipe 1/2; UPVC pipe low toughness, linear expansion coefficient, the use of a narrow temperature range. As part of the UPVC pipe, the UPVC drain also has the above features.
 Longsheng water pipe
UPVC drains are mainly used in construction drainage, municipal sewage and rainwater drainage. UPVC drainage pipes can be divided into UPVC solid wall drainage pipes, UPVC spiral rib drainage pipes, and UPVC core foam drainage pipes according to their structure. According to the use can be divided into the drainage pipe, sewage pipe, rain falling water pipe. Among them, UPVC solid wall drainage pipe is the most common, but due to the sound produced by the UPVC drainage pipe during use, it affects the normal life of the residents to a certain extent. Therefore, the UPVC spiral pipe and core bubble pipe that can effectively reduce noise can be reduced. Several new types of drainage pipes have gradually been accepted by the majority of users and have shown increasing momentum. UPVC spiral pipe due to the inner wall with 45 ° circumferential ribs, when used for riser drainage, the water flow in the pipe clockwise down, forming an air column in the middle, and greatly reduce the collision of water and air fatal and reduced Noise, which was designed to reduce noise sources, was originally invented by Koreans. The UPVC foam core tube has sound insulation due to foaming in the middle layer. In addition, the current market has begun to appear in the core foam spiral tube, the combination of the two, if the physical properties can meet the requirements of the conditions, I believe that the noise reduction effect will be more pronounced.
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