1. Introduction to PPR Pipe Fittings

• Core components for connecting PPR (Polypropylene Random Copolymer) pipe systems, enabling connections, redirections, control, and protection
• Material Advantages: High temperature resistance (≤95℃), corrosion resistance, non-toxic, compliant with standards like GB/T 18742 and ISO
• Key Role: Ensure leak-proof sealing, pressure capacity, and long-term system reliability

2. Major Fitting Categories and Functions

2.1 Connection & Redirection Fittings

• Couplings
  • Function: Straight connection for two same-diameter PPR pipes
  • Types: Equal couplings, reducing couplings (for diameter transitions)
  • Materials: Pure PPR or insert-style (brass/stainless steel threaded inserts)
• Elbows
  • Function: Change pipe direction, common angles 90°/45°, customizable for special angles (30°/60°)
  • Design: Large-radius elbows minimize flow resistance; insert elbows for metal pipe compatibility
• Tees & Crosses
  • Function: Branch or merge pipe flows
  • Types: Equal tees, reducing tees (different main/branch diameters), 顺水 tees (low-flow 冲击 design)

2.2 Control & Regulation Fittings

• Valves
  • Ball Valves: Quick on/off with 90° handle rotation, ideal for frequent operations
  • Globe Valves: Flow regulation via disc adjustment, superior sealing performance
  • Check Valves: Prevent backflow with spring-loaded discs (e.g., water heater systems)
• Union Fittings
  • Function: Removable connections for easy maintenance and repairs
  • Structure: Composed of nuts, gaskets, and bodies, compatible with PPR and metal pipes

2.3 Transition & Adaptation Fittings

• Material Adapters
  • PPR to Metal (Copper/Steel): Threaded inserts (male/female) for plastic-metal connections
  • PPR to PEX/PB: Special hot-melt adapters ensuring chemical compatibility between plastic pipes
• Size/Shape Converters
  • Reducers: Diameter transitions (e.g., De25 to De20)
  • End Caps: Seal pipe ends temporarily or permanently

2.4 Protection & Installation Fittings

• Pipe Clamps & Supports
  • Function: Secure pipes, reduce vibration and displacement; recommended spacing: 0.8-1m for horizontal pipes, 1-1.5m for vertical
  • Materials: Plastic clamps (lightweight), metal brackets (heavy-duty)
• Insulation & UV Protection
  • Thermal Insulation: Reduce heat loss in hot water systems, using PE/EVA materials
  • Sun Protection Sleeves: Prevent PPR aging in outdoor installations, extend service life

3. How to Choose the Right PPR Fittings?

1. Match Pipe Specifications
   • Nominal diameter (De16-De110) and pressure rating (PN1.0-PN2.5MPa) must align with pipes
   • Example: PN2.5MPa high-pressure systems require same-rated insert elbows
2. Consider Application Scenarios
   • Hot Water Systems: Prioritize ≥95℃耐温配件，brass inserts for corrosion resistance
   • Industrial Use: Pair with metal flanges or stainless steel inserts for mechanical strength
3. Certifications & Quality Standards
   • Check for ISO 9001, CE, WRAS, or NSF certifications
   • High-quality fittings feature smooth inner walls (scale resistance) and uniform wall thickness (stable pressure)

4. Typical Applications & Fitting Combinations

• Residential Water Supply
  • Combo: Equal couplings + 90° elbows + ball valves + unions for kitchen/bathroom layouts
• Commercial Hot Water Projects
  • Key Fittings: Reducing tees + check valves + insulated clamps for efficient circulation systems
• Old Building Renovation
  • Transition Solution: PPR-to-copper threaded adapters + unions for retrofitting galvanized steel pipes

5. ifan Pipeline’s One-Stop Fitting Solutions

• Full Product Range
  • Over 200 standard fittings (couplings/elbows/tees/valves) and custom options (special angles, insert materials)
• Technical Excellence
  • Inserts made of H59 brass (≥59% copper), passed 200,000-cycle pulse testing (远超国家标准)
  • Nickel-plated surface: Resist electrochemical corrosion for complex water quality
• Value-Added Services
  • Free system design drawings, custom fittings for DN15-DN1000 industrial projects
  • Ready stock, global delivery within 72 hours (via DHL/UPS)

Conclusion

Selecting the right PPR fittings is crucial for system safety and longevity. From basic connections to complex applications, consider material compatibility, pressure ratings, and installation environments. As a 20-year industry expert, ifan Pipeline offers certified fittings and custom solutions—visit ifanultra.com for free selection guides and technical support.