PVC pipe is a mature technology series of drainage pipes, which has been widely used at home and abroad. The products have the advantages of long life and corrosion resistance of cast iron pipes; they are more lightweight, easy to handle and easy to connect, and are widely used in civil construction drainage, chemical drainage, drainage and drainage. PVC drainage pipe and fittings meet the requirements of GB/T 5836.1-2006 and GB/T 5836.2-2006.
First, PVC pipe process
Production process raw materials + additive preparation → mixing → conveying feeding → forced feeding → cone twin-screw extruder → extrusion die → sizing sleeve → spray vacuum setting box → soaking cooling water tank → ink printer → crawler traction Machine → lifting knife cutting machine → pipe stacking rack → finished product inspection packaging
Second, PVC pipe physical properties
Test item standard value test standard
Density 1350-1460Q/HDS001-2003-ISO4400-90
Vicat softening temperature ≥ 80oC
Longitudinal shrinkage ≤ 5%
Drop hammer impact test 20oC TIR ≤ 10% or 0oC TIR ≤ 5%
Flat test does not break
Horizontal test without cracking, no leakage
Connection seal test without cracking, no leakage
Shading test opaque
Lead, tin, cadmium, mercury dissolution test
VCM content ≤ 1mg/kg
Methylene chloride stain immersion test qualified
Odor without bad smell
Third, the performance characteristics of PVC pipe:
1. The surface hardness and tensile strength of the pipe are excellent, and the safety factor of the pipe is high.
2. Good aging resistance, normal service life can reach more than 50 years.
3. The pipeline has excellent corrosion resistance to inorganic acids, alkalis and salts, and is suitable for industrial sewage discharge and transportation.
4. The friction coefficient of the pipeline is small, the water flow is smooth, it is not easy to block, and the maintenance workload is small.
5. The material has a high oxygen index and is self-extinguishing.
6. The coefficient of linear expansion of the pipe is small, 0.07mm/m. C, the amount of deformation affected by temperature is small. The thermal conductivity and elastic modulus are small, and the anti-icing performance is superior to that of the cast iron drain pipe.
7. Pipe and pipe joints can be bonded, the construction method is simple, the operation is convenient, and the installation work efficiency is high.
Fourth, how to identify PVC pipe
1. Look at the surface finish and whiteness first.
2, take the sample to fall, easy to break the person is generally high calcium products, of course, to meet your requirements, the price is right, then it is ok.
3. Take the sample with the foot on the side of the tube to see if it can crack, or the elongation at break after cracking.
4, the weather is very troublesome. The most direct way is to take a few days to get the high temperature and high light, to see the surface change rate, but it is a waste of time. Mainly look at the first three items just fine.
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