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Nylon/PP Piping and Fittings

Nylon and polypropylene piping systems offer chemical-resistant, lightweight options for industrial fluid handling. Nylon (often Nylon 12) pipes are rigid thermoplastics with excellent toughness and pressure capacity. They are commonly used for compressed air or instrumentation lines. Polypropylene (PP) piping is highly resistant to acids, bases and solvents, making it ideal for chemical process piping. Both materials come with a full range of fittings (elbows, tees, couplings, valves) for assembly. Like HDPE, they can be joined by solvent welding or mechanical seals, but maintain the added benefits of their material properties.

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Key Features

Chemical Resistance (PP): Polypropylene is highly inert to most chemicals (organic solvents, acids, alkalis).
Mechanical Strength (Nylon): Nylon has high tensile and compressive strength, ideal for pressurized fluid systems.
Low Weight: Easier to install than metal pipes and fittings.
Versatile Connections: Options include threaded, compression, or flange joints. PP can often be heat-fused.
Low Moisture Uptake (Nylon): Modern Nylon 12 absorbs very little water, maintaining size and properties.

Benefits

Longevity: Nonmetallic pipes won’t corrode; they last for decades in harsh chemical environments.
Safety: Insulative and non-sparking, useful where metal might cause issues.
Energy Efficiency: Smooth bore reduces friction losses, saving pumping energy.
Wide Compatibility: PP and nylon do not react with most fluids used in labs, automotive, or manufacturing.

Applications

Compressed Air Lines: Nylon 12 tubing is standard for clean, dry air distribution in factories.
Chemical Processing: PP pipe and fittings used for tanks, reactors, and vents handling corrosive fluids.
Laboratory & Instrumentation: Piping for analytical equipment (fume hoods, waste lines) due to chemical inertness.
Food & Beverage: Food-grade PP piping is used for beverage and dairy processing (heat-weldable to avoid leaks).
Marine & Aquaculture: Saltwater and brine handling where corrosion resistance is critical.

Technical Specifications

Materials: Nylon 11 or 12 (high purity grades), Polypropylene (homopolymer or copolymer, often glass-reinforced for strength).
Pressure Rating: Up to ~150 psi at 20°C for Nylon; PP typically rated PN10–PN16 (10–16 bar at 20°C).
Temperature Range: Nylon ~–40°C to +80°C; PP ~0°C to +100°C (copolymer grades higher).
Standards: Nylon tubing often to ISO 7628 (fluid power tubing); PP piping to ISO 15874 or ASTM D4101.

Unique Selling Points (USPs)

Non-Corrosive: Ideal replacement for metal in corrosive atmospheres.
Automated Assembly: Many fittings allow fast push-fit or heat-fusion joins.
Safety Rated: Non-toxic and often FDA/NSF certified for water contact.