(Polypropylene Random Copolymer) blue pipe fittings, you're likely looking at one of the most reliable systems for compressed air distribution. While PPR is famous for plumbing, the "blue" designation is the industry standard for compressed air to distinguish it from water lines.
Why Blue PPR for Pneumatics?
Unlike traditional metal pipes, blue PPR doesn't corrode or scale. This is crucial for pneumatic systems because rust flakes from metal pipes can ruin expensive air tools and clog valves.
Leak-Proof Joints: They use heat fusion welding, which turns the pipe and fitting into a single, continuous piece of plastic.
Low Pressure Drop: The smooth interior surface allows air to flow with minimal friction.
Pressure Rating: Most are rated for PN20 or PN25, comfortably handling standard shop pressures (usually up to 20 bar / 290 psi).
Common Types of Fittings
Couplings: For joining two straight lengths of pipe.
90° & 45° Elbows: For navigating corners and walls.
Equal & Reducing Tees: For tapping off a main header to create a drop-line for a tool.
Female/Male Threaded Adaptors: These are essential for connecting the PPR system to compressors, filters, or quick-disconnect couplers. They usually feature a brass insert molded into the blue plastic.
End Caps: To seal off sections of the line for future expansion.
