Unit 3546: Mechanical Piping Fabrication

1. Introduction to Mechanical Piping Fabrication

• Definition and scope of mechanical piping fabrication
• Importance in industrial and commercial applications
• Common applications: oil & gas, HVAC, water supply, chemical plants
• Key components involved: pipes, fittings, valves, supports, and accessories

2. Types of Piping Materials

• Overview of commonly used materials

2.1 Steel

• Carbon steel: properties, advantages, typical uses
• Stainless steel: corrosion resistance, applications

2.2 Copper

• Thermal conductivity, corrosion resistance, plumbing uses

2.3 PVC (Polyvinyl Chloride)

• Chemical resistance, lightweight, cost-effectiveness

2.4 Other Materials

• CPVC, PEX, HDPE, cast iron
• Selection criteria based on pressure, temperature, and fluid type

3. Piping Design and Layout

• Principles of piping system design
• Layout considerations: space utilization, accessibility
• Pipe sizing: flow rate, pressure drop calculations
• Routing: minimizing bends, avoiding obstructions
• Support structures: types, placement, load considerations

4. Piping Fabrication Techniques

• Overview of fabrication processes

4.1 Welding

• Types: arc welding, TIG, MIG
• Welding procedures and standards
• Safety measures during welding

4.2 Threading

• Thread types and standards
• Threading tools and techniques

4.3 Bending

• Methods: cold bending, hot bending
• Equipment and process control

4.4 Soldering and Brazing

• Process overview
• Suitable materials and applications

5. Pipe Joining Methods

• Overview and importance of proper joining

5.1 Welding Joints

• Butt welds, socket welds
• Advantages and limitations

5.2 Flanges

• Types of flanges and uses
• Installation and gasket considerations

5.3 Compression Fittings

• Mechanism and applications
• Advantages and disadvantages

5.4 Soldering

• Applications and effectiveness

6. Quality Control in Piping Fabrication

• Importance of quality assurance and control
• Inspection methods: visual, dimensional, non-destructive testing (NDT)
• Testing: hydrostatic, pneumatic
• Documentation and traceability
• Compliance with industry standards (ASME, API, ISO)

7. Pipe Support and Installation

• Role of pipe supports in system integrity
• Types of supports: clamps, hangers, anchors
• Installation techniques to prevent stress and vibration
• Thermal expansion considerations
• Leak prevention strategies

8. Piping System Maintenance

• Preventive maintenance strategies
• Common issues: corrosion, leaks, blockages
• Troubleshooting techniques
• Repair methods and tools
• Record keeping and system audits

9. Safety Practices in Piping Fabrication

• Overview of relevant safety regulations and standards
• Personal Protective Equipment (PPE) requirements
• Hazard identification and risk assessments
• Safe handling of materials and tools
• Emergency procedures and accident prevention