Unit 3545: Mechanical Piping Fabrication

1. Introduction to Mechanical Piping Fabrication

• Overview and definition of mechanical piping fabrication
• Importance across industries (e.g., oil & gas, chemical, power generation, HVAC)
• Basic terminology and key concepts
• Role of piping systems in industrial processes

2. Types of Piping Materials

• Common piping materials:
  • Steel (carbon steel, stainless steel)
  • Copper
  • PVC and other plastics
  • Other specialty materials (e.g., HDPE, alloy materials)
• Material selection criteria:
  • Pressure ratings
  • Temperature tolerances
  • Fluid compatibility (corrosion, chemical resistance)
  • Cost and durability considerations

3. Piping Fabrication Techniques

• Cutting methods:
  • Sawing, torch cutting, mechanical cutting
• Bending methods:
  • Cold bending, hot bending, induction bending
• Joining and assembly:
  • Welding processes (arc welding, TIG, MIG)
  • Threading
  • Flanging
  • Brazing and soldering
• Quality control and inspection during fabrication

4. Piping Components and Fittings

• Overview of components:
  • Elbows, tees, reducers
  • Flanges (types and uses)
  • Valves (gate, ball, globe, check valves)
  • Couplings and unions
• Functional roles in piping systems:
  • Direction changes
  • Flow control
  • Pressure management
  • Connection and disconnection

5. Piping Codes and Standards

• Importance of adherence to codes and standards
• Overview of major codes and standards:
  • ASME B31 series
  • ASTM standards
  • API standards
  • ISO standards related to piping
• Implications for safety, quality, and legal compliance

6. Piping System Design Basics

• Principles of piping system design
• Layout planning and routing
• Sizing methodologies based on flow, pressure drop, and velocity
• Material selection considerations for design
• Considerations for thermal expansion, support, and insulation

7. Piping Installation and Testing

• Installation procedures:
  • Alignment and leveling
  • Supports, hangers, and anchors
  • Expansion joints
• Testing methods:
  • Hydrostatic testing
  • Pneumatic testing
  • Leak detection techniques
• Documentation and compliance verification

8. Maintenance and Troubleshooting of Piping Systems

• Routine maintenance practices
• Common issues encountered (corrosion, leaks, blockages)
• Troubleshooting techniques and diagnostic tools
• Preventive maintenance strategies
• Safety protocols during maintenance