Unit 3544: Mechanical Piping Fabrication Fundamentals

1. Overview of Piping Systems

• Introduction to Piping Systems
  • Definition and purpose
  • Applications in industry
• Components of Piping Systems
  • Pipes
  • Fittings
  • Valves
  • Flanges
• Types of Pipes
  • Metallic pipes: steel, stainless steel, copper
  • Non-metallic pipes: PVC, CPVC
• Common Fittings and Valves
  • Elbows, tees, reducers, couplings
  • Gate, globe, ball, check valves

2. Reading Piping Drawings and Symbols

• Introduction to Piping Drawings
  • Types of drawings: isometric, orthographic, schematic
• Common Piping Symbols and Abbreviations
  • Pipe lines and sizes
  • Valves and fittings symbols
  • Instrumentation symbols
• Interpreting Layouts and Specifications
  • Flow directions
  • Material call-outs
  • Welding and fabrication notes

3. Materials Used in Piping Fabrication

• Metallic Materials
  • Carbon steel: properties and uses
  • Stainless steel: corrosion resistance and applications
  • Copper: thermal conductivity and plumbing uses
• Non-metallic Materials
  • PVC and CPVC: chemical resistance and applications
• Material Selection Criteria
  • Pressure ratings
  • Temperature considerations
  • Corrosion resistance

4. Piping Fabrication Techniques

• Cutting Methods
  • Sawing, torch cutting, mechanical cutting
• Threading
  • Types of threads
  • Threading tools and procedures
• Bending
  • Cold bending
  • Hot bending
  • Use of pipe benders and rollers
• Joining Techniques
  • Welding: types (MIG, TIG, Arc welding)
  • Soldering and Brazing
  • Use of flanges and couplings

5. Pipe Support and Hanger Systems

• Importance of Supports and Hangers
  • Maintaining alignment and stability
  • Reducing stress and vibration
• Types of Supports
  • Rigid supports
  • Spring hangers
  • Roller supports
• Installation Methods
  • Positioning and spacing
  • Load considerations

6. Pipe Testing and Inspection

• Testing Procedures
  • Hydrostatic pressure testing
  • Pneumatic testing
• Leak Detection Techniques
  • Visual inspection
  • Use of detectors and dye penetrants
• Inspection Standards
  • Documentation and reporting
  • Acceptance criteria

7. Safety Practices in Piping Fabrication

• Identifying Potential Hazards
  • Mechanical hazards
  • Chemical hazards
  • Thermal hazards
• Personal Protective Equipment (PPE)
  • Types and proper use
• Safety Protocols
  • Lockout/tagout procedures
  • Safe welding and cutting practices
  • Emergency response

8. Introduction to Codes and Standards

• Overview of Relevant Codes
  • ASME B31.3: Process Piping
  • ASTM standards for materials
  • Local building and safety codes
• Importance of Compliance
  • Quality assurance
  • Legal and safety implications

9. Piping System Maintenance

• Preventive Maintenance Practices
  • Regular inspection schedules
  • Cleaning and corrosion control
• Troubleshooting Common Issues
  • Leak detection
  • Wear and fatigue
• Extending System Lifespan
  • Proper operation
  • Timely repairs and replacements