PP-FR
This material is a high-performance thermoplastic engineered to prevent the spread of fire. It is widely used in industries where fire safety and chemical resistance are both critical, such as semiconductor manufacturing, laboratory engineering, and ventilation systems.
FR-PP is a UL 94 V-0 flammability test compliant polypropylene with 180°F (82°C) temperature resistance and low cost. It resists acids and alkalines (pH 0-14), organic solvents and degreasers. For weld integrity, request FR-PP weld rod, made from the same resin grade used to produce sheet
Key Properties
Easy to Form, Fabricate and Weld
Good Mechanical Properties and Light Weight
Resists Acids, Alkalines, And Many Solvents
FR-PP Weld Rod Available
UL 94 V-0 Compliance
Limitations
Lower Impact Strength Than HDPE
Poor Resistance to Aromatic, Aliphatic and Chlorinated Solvents.
Applications
Chemical Storage and Transfer Tanks
Electrical Enclosures, Doors
Equipment Exposed to Acids, Bases
Insulating Panels, Components
Scientific Equipment and Furniture
Key Features of PP-FR
- Flammability Rating: Most PP-FR products meet the UL 94 V-0 standard, meaning the material self-extinguishes within 10 seconds and does not allow flaming drips.
- Chemical Resistance: It maintains the classic polypropylene advantage of being highly resistant to acids, alkalis, and organic solvents.
- Temperature Range: Generally stable for continuous service up to 82°C (180°F), though specialized grades can handle higher peaks.
- Physical Properties: It is lightweight, has high rigidity (especially in the upper temperature ranges), and exhibits very low moisture absorption.
Applications
- Semiconductor Industry: Wet benches, wafer processing tools, and cabinetry.
- Laboratory Engineering: Fume hoods, chemical storage, and benches.
- Power & Environment: Air-conditioning systems, ventilation ducts, and scrubbing towers.
- Electrical: Enclosures for electrical components where there is a risk of sparking or heat.
Technical Note: Unlike standard PP (which is highly flammable), PP-FR contains additives that can slightly alter its welding properties. It is usually recommended to use welding rods made of the exact same resin grade to ensure a secure, chemical-resistant bond.
It is specifically designed for “Special Waste” (chemical drainage) where fire safety is a building code requirement.
- Material: Flame Retardant Polypropylene (PP-FR).
- Flame Rating: Generally, meets UL 94 V-0 and is often used in “above-grade” (inside building) applications where non-flame-retardant plastics are prohibited by fire codes.
- Key Advantage: It uses electrofusion technology (a heating coil embedded in the fitting) to create a leak-proof, chemically resistant permanent bond.
Specialized PP-FR Systems
- Anz PP-FR Double containment: A “Double Containment” system where the inner pipe (carrying the chemicals) is PP-FR and the outer pipe provides a second layer of protection.
- AnZ 25/50: A specific grade designed to meet the ASTM E84 standard (25 Flame Spread / 50 Smoke Developed index), allowing it to be installed in return air plenums (the spaces above ceilings where air circulates).
Why Choose PP-FR?
- Corrosion Resistance: It handles aggressive chemical mixtures (acids, bases, solvents) better than metal pipes.
- Temperature Range: Can handle continuous temperatures up to 82°C (180°F) and intermittent peaks up to 100°C (212°F).
- Installation: The electrofusion process is highly automated, reducing the risk of human error compared to manual solvent welding or mechanical threading.
PP (The Core Product)
AnZ is a flame-retardant polypropylene system used for chemical waste in non-pressurized (gravity) or low-pressure applications.
- Standard Sizes: Generally available in 1½” to 12″ diameters.
- Material Distinction: AnZ colours their flame-retardant pipe bluish-grey or black with a blue stripe to distinguish it from their non-flame retardant (PROGEF) line.
- Flame Rating: * UL 94 V-2 (Standard for PP).
- ASTM D635: Rated as self-extinguishing.
- ASTM E84 (25/50): While standard PP-FR doesn’t meet this, AnZ offers a specific 25/50 PVDF system for return-air plenums where even stricter fire/smoke codes apply.
Connection Technology: Electrofusion
The standout feature of AnZ’s PP-FR system is how it is joined. Unlike standard “glue” (solvent welding) which doesn’t work on polypropylene, AnZ uses Electrofusion:
- The Coil: Each fitting contains an embedded electrical heating coil.
- The Machine: You use a “Electro Plus” processor to send a specific current to the fitting.
- The Result: The pipe and fitting melt together into a single, homogenous piece of plastic, creating a joint that is often stronger than the pipe itself.
Common Applications for PP-FR
- Higher Education & Schools: Laboratory sink drainage where students may pour various chemicals down the drain.
- Hospitals: Radioactive waste lines or dialysis clinics where aggressive cleaning agents are used.
- Industrial Plants: Battery manufacturing or chemical processing “above-grade” (where fire codes require flame retardancy).
Anz PP-FR Double Containment
For hazardous chemicals where a leak would be catastrophic, provides a “pipe-within-a-pipe” system.
- Primary (Inner) Pipe: Typically, PP-FR for chemical resistance and fire safety.
- Secondary (Outer) Pipe: Can also be PP-FR or PP-NFR (Non-Flame Retardant) if the pipe is buried underground where flame spread is not a concern.