PP-R tube overview
Type III polypropylene (PP-R)
1. Nature and production process
PP-R is non-toxic, hygienic and recyclable. PP-R has a Vicat softening temperature of 131 ° C, a maximum use temperature of 95 ° C, and a long-term use temperature of 70 ° C. It is a heat-resistant, heat-insulating and energy-saving product. Its density is 900 kg / m3.
The PP-R pipe is produced by extrusion molding, and the PP-R pipe is produced by injection molding.
2, production standards
At present, there is no unified national pipe standard in China. PP-R production lines are mostly imported from Germany, and PP-C production lines are mostly imported from South Korea. Manufacturers mostly develop their own corporate standards with reference to German standards.
PP-R production specifications range from 20mm to 95mm in various pipe diameter categories.
3, connection methods and accessories
Hot melt connection between PP-R pipe and fittings. When the PP-R is connected with the metal pipe fitting, a polypropylene pipe fitting with a metal insert is used as a transition, and the pipe fitting is thermally welded to the PP-R, and the metal pipe is connected by a thread.
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