PPH Materials

1. Pre-Installation Preparation

• Inspect all PPH materials for damage or defects
• Clean surfaces to remove dust, oil, or moisture
• Ensure correct dimensions and alignment
• Use proper tools for cutting and welding

2. Cutting of PPH Materials

• Use:
  • Pipe cutters
  • Fine-tooth saws
• Ensure smooth and burr-free edges
• Avoid overheating during cutting

3. Jointing Methods

a) Butt Fusion Welding

• Most common method for PPH pipes
• Steps:
  • Heat pipe ends using a heating plate
  • Press together under controlled pressure
  • Allow to cool properly
    
    

b) Socket Fusion Welding

• Used for small diameter pipes and fittings
• Pipe and fitting are heated and joined together
  
  

c) Extrusion Welding

• Used for:
  • Sheets
  • Tanks
  • Fabricated structures
     

d) Flange Connections

• Used where dismantling is required
• Use gaskets and bolts for tight sealing

4. Installation of Piping System

• Align pipes properly before joining
• Provide adequate supports and clamps
• Maintain correct spacing to avoid sagging
• Allow for thermal expansion and contraction

5. Handling & Storage

• Store in dry, shaded areas
• Protect from:
  • Direct sunlight (unless UV stabilized)
  • Mechanical damage
• Avoid dragging pipes on rough surfaces

6. Pressure Testing

• Perform hydrostatic testing after installation
• Check for:
  • Leakage
  • Joint strength
• Follow recommended pressure limits

7. Safety Precautions

• Use protective equipment (gloves, goggles)
• Handle heating tools carefully
• Ensure proper ventilation during welding

8. Installation for Sheets & Tanks

• Use extrusion welding or hot gas welding
• Ensure:
  • Uniform welding
  • Proper joint strength
• Provide structural support for large tanks 

Maintenance

1. Regular Inspection

• Check for:
  • Cracks or deformation
  • Leakage at joints
  • Surface wear or damage
• Inspect periodically, especially in high-pressure or chemical environments

2. Cleaning

• Clean surfaces using:
  • Water
  • Mild detergents
• Avoid:
  • Abrasive materials
  • Harsh chemicals that may affect surface quality

3. Joint & Connection Check

• Inspect welded joints and flanges for:
  • Loosening
  • Leakage
• Tighten bolts in flange connections if required
• Replace damaged gaskets

4. Protection from UV Exposure

• For outdoor installations:
  • Use UV-stabilized PPH
  • Apply protective coatings or covers
    
    

5. Temperature & Pressure Monitoring

• Ensure operating conditions stay within limits:
  • Temperature: up to ~90–100°C
  • Pressure: as per design rating
     

6. Avoid Mechanical Damage

• Protect from:
  • Impact
  • Excessive load or stress
• Use proper supports to prevent sagging or bending

7. Chemical Compatibility Check

• Ensure fluids being transported are compatible with PPH
• Avoid unexpected chemical reactions that may weaken material

8. Repair & Replacement

• Minor damage:
  • Repair using extrusion welding or patching
• Major damage:
  • Replace affected section
     

9. Periodic Pressure Testing

• Conduct hydrostatic testing to:
  • Detect leaks
  • Ensure system integrity
• Follow recommended testing intervals