Material Properties
PPH (Polypropylene Homopolymer) nipple fittings feature excellent chemical resistance and thermal stability:
- Density: 0.90-0.91 g/cm³
- Melting Point: 160-165°C
- Continuous Service Temperature: -20°C to +95°C
- Thermal Expansion Coefficient: 0.15 mm/m°C
Product Specifications
- Pressure Rating: PN10-PN16 (10-16 bar)
- Size Range: DN20-DN250 (½”-10″)
- Connection Types:
- Socket weld ends
- Flanged connections
- Threaded (BSP/NPT) options
- Color Coding: Standard gray (custom colors available)
Chemical Resistance
PPH demonstrates outstanding resistance to:
- Strong acids and bases (pH 1-14)
- Salt solutions
- Alcohols and glycols
- Oxidizing agents (except concentrated)
Installation Guidelines
- Welding Preparation:
- Clean and bevel pipe ends
- Maintain 260±5°C welding temperature
- Allow 2 minutes cooling per mm thickness
- Threaded Connections:
- Apply PTFE tape (15-20 wraps)
- Hand-tighten plus 1-1.5 turns with wrench
- Maximum torque: 35Nm (DN50 size)
- Quality Control:
- Visual inspection of weld beads
- Pressure test at 1.5x working pressure
- Check for proper alignment
Performance Characteristics
- Tensile Strength: 30-35 MPa
- Impact Strength: 40 kJ/m² (notched)
- Hydrostatic Design Stress: 5-6.3 MPa (50-year)
- Flow Characteristics: Smooth bore, minimal pressure drop
Applications
- Chemical processing systems
- Water treatment plants
- Industrial wastewater lines
- Acid/alkali transfer systems
Maintenance Requirements
- Annual visual inspection
- 5-year pressure testing
- Replacement indicators:
- Visible cracking
- Wall thinning >10%
- Joint degradation
Standards Compliance
- DIN 8077/8078 (PP materials)
- ISO 9393-1 (pressure testing)
- NSF/ANSI 61 (potable water)
- DVGW (German water standards)
Technical Advantages
- Superior chemical resistance
- Excellent thermal stability
- Lightweight yet durable
- Long service life (25+ years)
- Low maintenance requirements
Conclusion
PPH nipple fittings provide reliable connections for demanding industrial applications, combining excellent chemical resistance with robust mechanical properties. Their versatile connection options and long service life make them an economical choice for corrosive fluid handling systems. Proper installation following manufacturer guidelines ensures optimal performance throughout the product lifecycle.
IFAN factory started in 1993. And IFAN has workshop 120000 square meter with 610 staff. IFAN can design and produce all plumbing pipe and fitting include PPR,PVC,CPVC PPSU HDPE PEXA PEXB PERT pipe and fitting ,brass fitting, brass ball valve ,heating system , gas system , sanitary faucets and hose, In the past 30 Years, IFAN has never forgotten his mission-To protect health and safety. And IFAN factory use best materials to produce high quality pipe and fittings with automatic production line and high tech quality control machines. The most important,IFAN can guarantee that all pipes and fittings manufactured by IFAN are qualified. More information pls feel free contact us Whatsapp.