Good Quality Factory Directly Master Plastic Clip Fitting Large Diameter Fittings With Price
PP-R pipe is also called three-type copolymerized polypropylene pipe and random copolymerized polypropylene. It is a new type of plastic pipe product developed and applied in Europe in the early 1990s. In the late 1980s, PP-R became a new generation of pipeline materials by adopting the gas phase copolymerization process to randomly and uniformly polymerize the molecular chain of about 5% PP (random copolymerization). It has high strength, good impact resistance and long-term creep performance. At the same time, the pipeline has excellent corrosion resistance to chemicals and is insoluble in any known solvent at room temperature, so it is more suitable for transporting chemical fluids in places such as chemical plants in addition to home decoration. With a lifespan of up to 50 years, there is no cheaper material on the market that can replace it.
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Physical properties: Generally speaking, random PP copolymers have better flexibility and lower stiffness than PP homopolymers. They also retain moderate impact strength when temperatures drop to 32°F, and their usefulness is limited when temperatures drop to -4°F. The flexural modulus (secant modulus at 1% strain) of the copolymers is in the range of 483 to 1034 MPa, while that of the homopolymers is in the range of 1034 to 1379 MPa. The molecular weight of the PP copolymer material does not have as much effect on stiffness as the PP homopolymer. Notched Izod impact strengths are generally in the range of 0.8 to 1.4 ft.lbs/in.
Chemical properties: random PP copolymer to acid. Strong resistance to the action of alkalis, alcohols, low-boiling hydrocarbon solvents and many organic chemicals. At room temperature, PP copolymers are substantially insoluble in most organic solvents. Also, when exposed to soap, soap lye. In aqueous reagents and alcohols, they do not suffer from environmental stress rupture damage like many other polymers. When in contact with certain chemicals, especially liquid hydrocarbons. Chlorinated organics and strong oxidants can cause surface cracks or swelling. Non-polar compounds are generally more readily absorbed by polypropylene than polar compounds.
Barrier properties: PP copolymers and homopolymers have very low water vapor permeability (0.5 g/ml/100 square inches/24 hours). These properties can be improved by orientation. Stretch blow molded polypropylene bottles have improved water vapor permeability to 0.3 and oxygen permeability to 2500.
Electrical properties: Generally, polypropylene has good electrical properties, including: high dielectric strength, low dielectric constant and low dissipation factor; however, homopolymers are generally chosen for electrical applications.
1. Cold and hot water systems of buildings, including central heating systems;
2. Heating systems in buildings, including floors, siding and radiant heating systems;
3. Pure water supply system for direct drinking;
4. Central (centralized) air conditioning system;
5. Industrial pipeline systems such as transporting or discharging chemical media.
Located in Jiangsu, with convenient water and land transportation. It is a comprehensive enterprise integrating research, development, design, application, production and sales. The company has production lines for PE water supply pipes with larger diameters, prestressed corrugated pipes, corrugated pipe production lines, PVC pipe production lines and other equipment. Specializing in the production of PE water supply pipes, prestressed corrugated pipes, HDPE corrugated pipes, plastic blind trenches, permeable pipes, etc. The products are mainly used in municipal administration, highways, railways, water conservancy, power, environmental greening and infrastructure construction, and are used in municipalities and expressways. Many national key projects such as railways and railways have been well received by engineering experts and users.
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A: Send an email to us and we will get back to you within one day.
Q: Is it possible to use the label or packaging I specified?
A: Yes. If necessary, we would like to use labels or packaging according to your requirements.
Q: How do you guarantee that the products you provide are qualified?
A: We always believe that integrity and responsibility are the foundation of a company, so any products we provide you are qualified. We will test the goods and provide COA before delivery.