PPb Pipe Metric

Our polypropylene (PP-b) pipe range is designed for demanding industrial environments where chemical resistance, high operating temperatures and reliable pressure performance are essential. Manufactured from high-quality polypropylene, these pipes form part of a robust pipework system suitable for conveying aggressive fluids safely and efficiently across a wide range of industries.

Available in 6 bar and 10 bar pressure ratings, the range covers diameters from 20mm up to 355mm, making it suitable for everything from compact process lines to larger industrial installations. With a smooth internal bore, excellent thermal performance and outstanding resistance to chemical attack, PP-b pipe is a proven alternative to metal systems in corrosive applications.

• Material: Polypropylene block co-polymer (PP-b)
• Pressure ratings:
  • 6 bar - sizes from 50mm to 315mm
  • 10 bar - sizes from 20mm to 160mm
• Operating temperature range: -20°C to 120°C
• Standards:
  • BS 4991 : 1974 Series 2
  • DIN 8077/8 Type 2 PP-B
• Smooth bore: Low pressure loss and high volume flow
• Chemical performance: Suitable for hazardous and corrosive media at elevated temperatures

Polypropylene is a thermoplastic polymer widely used in industrial pipework due to its excellent chemical, abrasion and impact resistance. Compared to many traditional materials, PP offers long-term durability without corrosion, scaling or degradation, even when exposed to aggressive fluids or high temperatures.

The PP pipes supplied in this range are manufactured from high heat-stabilised block copolymer (PP-B). This provides superior impact resistance at low temperatures compared to standard homopolymers, while maintaining excellent chemical compatibility across a wide temperature range.

This category includes both 6 bar and 10 bar PP pipe, allowing you to select the correct pressure class for your application. Higher pressure ratings are ideal for compact systems and higher operating loads, while larger diameter 6 bar pipe provides an efficient solution for high-volume, lower-pressure installations.

For full dimensional data, weights and pressure performance, please refer to the individual 6 bar and 10 bar product pages.

Polypropylene pipe systems are widely used across industrial and specialist sectors, including:

• Chemical processing and transfer
• Acid and alkali conveyance
• Industrial waste treatment and effluent systems
• Pharmaceutical and biotechnology facilities
• Hospital and laboratory drainage
• Water treatment and de-mineralised water systems
• Brewing, distilling and food production
• Electronics and ultra-pure water applications
• Nuclear and specialist industrial environments

• Smooth Bore
  • The internal surface is exceptionally smooth, reducing friction, minimising pressure loss and allowing high flow rates
• Ductility & Flexibility
  • PP pipes will deform under load and return to their original shape once the load is removed. This makes them well suited to installations where minor ground movement or alignment adjustment is required. Pipes can be cold-pulled to large radii for ease of installation
• Maintenance Free
  • Polypropylene will not corrode or rot and can be buried underground or cast into concrete without adverse effects, reducing long-term maintenance costs
• Lightweight
  • With a lower density than many thermoplastics, PP pipes are easy to handle, transport and install, helping to reduce installation time and labour costs
• Thermal & Condensation Resistance
  • As a poor conductor of heat, polypropylene reduces external condensation compared to metal pipework, making it suitable for temperature-sensitive environments
• UV & Purity Options
  • Beige grey PP offers good UV resistance for outdoor use in UK conditions, while pure/natural PP contains no pigment and is suitable for applications where contamination must be avoided, including food and ultra-pure water systems

Polypropylene exhibits very high resistance to chemical attack, particularly from water, acids, alkalis and many inorganic environments. Water absorption is extremely low, and long-term exposure to aqueous solutions has negligible effect on material performance, even at elevated temperatures.

PP pipe is resistant to a wide range of organic and inorganic chemicals, making it ideal for chemical plant and processing applications. While strong oxidising agents can affect polypropylene under certain conditions, most industrial fluids produce minimal impact when used within recommended limits.