Quality PVC pipes choose Notes portrait Weapon

Quality PVC pipes choose Notes portrait Weapon
In the decoration when the laying of wires, most of the lines of the family are buried. Flame retardant PVC tubes used in this way, as the PVC pipe prices than the average of your five or six dollars per metre of pipe, many owners buy wire tubes are common in thin plastic pipe, use this tube as soon as the wire leakage current, not fire. Lots of family decoration heavy use of combustibles such as wood, fabric as indoor decoration material, often used without fire, ugly room power switch cabinet or decorative box closed up, these are fire hazards.
PVC-u pipe referred to as PVC-u water supply pipe used in water supply, is taking PVC resins as main raw material, included in special AIDS, extrusion molding and extrusion machine. But requires the use of vinyl chloride units (VCM) low sanitary PVC tree paint residues, both drug-free or low-toxicity (organic tin or lead content lower) thermal system in order to guarantee the health of pipes. VCM is a carcinogenic substance, provided sanitary PVC resin in China, VCM residues is not more than 5x10-6, lead is a cumulative poison, especially for young children (under 6 years old), the health of the fetus, pregnant women a greater impact.
Unlike PVC-u drainage pipe, PVC-u water supply pipe is the main mechanical parameters of resistance to pressure, factors affecting the tubing pressure resistance of existing machinery and equipment, raw material and formula elements, while also taking into account the process of adjustments. Clearance of extrusion screw and barrel should not be too large; amount of feeding more and more compressed than; design reasonable formula, rational process and accordingly adjusted, will control in 60%~70% of plastic.
Although rigid PVC-u water supply pipe itself is large, low temperature and excellent resistance to pressure, pressure ring stress is greater than the 36MPa resistance of 20 ° c, is currently on the market with the largest water supply pipes for construction of, but its high temperature and high pressure is very poor, so can only be used for 45 under cold water or cold water pipe system.

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