Let's learn about PVC water supply pipes together
Let's learn about PVC water supply pipes togetherThe PVC water supply pipe is made of hygienic-grade polyvinyl chloride resin as the main raw material, adding a certain amount of stabilizers, lubricants, fillers, color enhancers, etc., through plastic extruder extrusion molding and injection molding machine injection molding. A kind of water supply pipe produced by the process of setting, inspection and packaging
Chinese name: PVC water supply pipe, with polyvinyl chloride resin as the main raw material, specifications: Φ20, Φ25, Φ32, etc. Main features: light weight, good corrosion resistance, and other material characteristics, transportation of drinking water, mud and chemicals, indoor water supply, intermediate water system, etc.
table of Contents
1 Main process
2 Pipe properties
3 Specifications
4 Pipeline pressure regulations
5 Main features
6 Material properties
7 Scope of application
Main process
The PVC water supply pipe is made of hygienic-grade polyvinyl chloride resin as the main raw material, adding a certain amount of stabilizers, lubricants, fillers, color enhancers, etc., through plastic extruder extrusion molding and injection molding machine injection molding, through cooling, solidification, A kind of water supply pipe produced in the process of shaping, inspection and packaging.
Pipe characteristics
ABS (acrylonitrile-butadiene-styrene copolymer)
ABS is used to transport drinking water, mud and chemicals. The most commonly used DWV (Drain Waste Exhaust) application.
Unplasticized polyvinyl chloride (UPVC) and CPVC (post-chlorinated polyvinyl chloride)
UPVC has excellent chemical resistance over the entire operating temperature range and a wide range of operating pressure bands. Due to the long-term high-strength characteristics, stiffness and cost-effectiveness, UPVC systems account for a considerable proportion of plastic pipe installations.
CPVC is resistant to many acids, alkalis, salts, paraffins, halogens and alcohols. It is not resistant to solvents, aromatic hydrocarbons and certain chlorinated hydrocarbons.
specification
The specifications of PVC water supply pipes are Φ20, Φ25, Φ32, Φ40, Φ50, Φ63, Φ75, Φ90, Φ110, Φ125, Φ140, Φ160, Φ180, Φ200, Φ225, Φ250, Φ280, Φ315, Φ355, Φ400, Φ450, Φ500 , Φ630, Φ720, Φ800, etc. The pressures shown in PVC water supply pipes are expressed as nominal pressures, expressed in Mpa. The nominal pressure is specified as 5 types such as 0.63Mpa, 0.8Mpa, 1.0Mpa, 1.25Mpa, 1.6Mpa. The minimum diameter pipe of each pressure zone is defined as: the minimum diameter of 0.63Mpa pipe is 63mm, the minimum diameter of 0.8Mpa pipe is 50mm, the minimum diameter of 1.0Mpa pipe is 40mm, the minimum diameter of 1.25Mpa pipe is 32mm, 1.6Mpa The minimum diameter of the pipe is 20mm and 25mm. The length of the pipe is generally 4m, 6m, 8m, which can also be determined by negotiation between the supplier and the buyer.
Pipeline pressure regulations
(1) The pressures shown in the PVC water supply pipeline are expressed as nominal pressures, expressed in Mpa, 1Mpa ≈ 10kgf / cm2, that is, the working pressure of the pipe at 20 ℃, conveying medium. However, as the temperature of the medium increases (no medium> 50 ° C should be transported), the working pressure decreases accordingly. This objectively must consider the safety factor of sufficient pressure in the selection of the water supply pipeline [1]
(2) The nominal pressure of the water supply pipe is specified as: 0.6Mpa, 0.8Mpa, 1.0Mpa, 1.25Mpa, 1.6Mpa and so on.
(3) The nominal pressure of pipes of the same specification is generally divided by the wall thickness of the pipe.
(4) The minimum diameter pipe of each pressure zone is specified as: the minimum diameter of 0.6Mpa pipe is 63mm, the minimum diameter of 0.8Mpa pipe is 50mm, the minimum diameter of 1.0Mpa pipe is 40mm, and the minimum diameter of 1.25Mpa pipe is 32mm , The minimum diameter of 1.6Mpa pipe is 20mm and 25mm.
(5) The nominal pressure of the water supply pipe is generally 1.6Mpa, and it is compatible with various pressure pipes.
main feature
1. Light weight, convenient handling and loading and unloading: low density, convenient handling, loading and unloading and construction.
2. Excellent corrosion resistance: It has excellent acid resistance, alkali resistance and corrosion resistance, which is very suitable for the use in the chemical industry.
3. Small fluid resistance: the inner wall of the pipe is smooth, the roughness coefficient is only 0.009, and the fluid resistance is small, which effectively improves the hydraulic conditions of the pipe network and reduces the operating cost of the system.
4. Large mechanical strength: the pipe has good pressure resistance, impact resistance and tensile strength properties.
5. Simple construction: the pipeline connection construction is quick and easy, and the construction cost is low.
6. Low cost: low price, convenient transportation and construction, and long service life, so the overall cost is low.
7. Does not affect the water quality: It is confirmed by the dissolution test that it does not affect the water quality and is suitable for large-scale popularization and application.
Material properties
ABS (acrylonitrile-butadiene-styrene copolymer)
ABS is used to transport drinking water, mud and chemicals. The most commonly used DWV (Drain Waste Exhaust) application.
Unplasticized polyvinyl chloride (UPVC) and CPVC (post-chlorinated polyvinyl chloride)
UPVC has excellent chemical resistance over the entire operating temperature range and a wide range of operating pressure bands. Due to the long-term high-strength characteristics, stiffness and cost-effectiveness, UPVC systems account for a considerable proportion of plastic pipe installations.
CPVC is resistant to many acids, alkalis, salts, paraffins, halogens and alcohols. It is not resistant to solvents, aromatic hydrocarbons and certain chlorinated hydrocarbons.
PP (polypropylene)
Polypropylene is suitable for use in food, drinking water and ultra-pure waters, as well as in the pharmaceutical and chemical industries.
PE (polyethylene)
Polyethylene has been successfully used for many years for the safe transportation of drinking water and wastewater, hazardous waste, and compressed gases.
Application range
1. Indoor water supply and reclaimed water system for civil buildings and industrial buildings;
2. Buried water supply system in residential area and factory area;
3. Urban water supply pipeline system;
4. Water treatment pipeline system of water treatment plant;
5. Marine aquaculture;
6. Garden irrigation, well drilling and other engineering and other industrial pipes.
