Unit 3551: Advanced Piping Fabrication Techniques and Quality Control

1. Introduction to Advanced Piping Fabrication

• Overview of piping fabrication processes
• Importance of advanced techniques in modern industry

2. Advanced Welding Techniques in Piping Fabrication

2.1 TIG Welding (Tungsten Inert Gas)

• Principles and equipment
• Applications in piping fabrication
• Process optimization strategies
• Quality control considerations

2.2 MIG Welding (Metal Inert Gas)

• Process fundamentals
• Advantages and limitations
• Parameter settings for pipe welding
• Inspection and defect prevention

2.3 Orbital Welding

• Concept and automation benefits
• Equipment and setup
• Process control and monitoring
• Use cases in piping systems

3. Pipe Stress Analysis and Design Considerations

3.1 Principles of Pipe Stress Analysis

• Thermal expansion and contraction
• Pressure loads and internal stresses
• External loads and environmental factors

3.2 Support Design

• Types of pipe supports and hangers
• Load distribution and movement allowance
• Prevention of stress concentration

3.3 Application of Industry Codes and Standards

• ASME B31 series overview
• API and ASTM standards relevant to piping
• Compliance and documentation

4. Advanced Pipe Cutting and Beveling Methods

4.1 Plasma Cutting

• Operating principles
• Advantages for pipe cutting
• Safety and precision aspects

4.2 CNC Cutting

• Computer numerical control technology
• Programming and automation benefits
• Accuracy and repeatability

4.3 Abrasive Water Jet Cutting

• Mechanism and equipment
• Material compatibility
• Edge quality and bevel accuracy

4.4 Importance of Precision Cutting

• Fit-up quality impact on welding
• Minimizing rework and defects

5. Corrosion Protection and Coating Technologies in Piping

5.1 Corrosion Mechanisms in Piping

• Types of corrosion affecting pipes
• Environmental and chemical factors

5.2 Cathodic Protection

• Fundamentals and types (sacrificial anode, impressed current)
• Application methods
• Monitoring and maintenance

5.3 Epoxy Coatings

• Properties and application techniques
• Surface preparation
• Performance and durability

5.4 Thermal Spray Coatings

• Types (metallic, ceramic)
• Application equipment
• Benefits for corrosion resistance

6. Advanced Pipe Fabrication Materials and Specifications

6.1 Exotic Alloys

• Types (Inconel, Hastelloy, Duplex stainless steels)
• Properties and applications

6.2 Composite Materials

• Fiber-reinforced polymers
• Benefits and limitations

6.3 High-Performance Plastics

• Types (PTFE, PFA)
• Chemical resistance and temperature ranges

6.4 Material Selection Criteria

• Operating temperature and pressure
• Corrosion and environmental exposure
• Industry and regulatory requirements

7. Fabrication of Special Piping Components

7.1 Pipe Spools

• Definition and fabrication process
• Handling and transportation considerations

7.2 Expansion Joints

• Types and functionality
• Fabrication challenges
• Inspection and testing

7.3 Manifolds

• Design considerations
• Welding and assembly techniques
• Quality assurance

8. Quality Control and Inspection Techniques in Piping Fabrication

8.1 Quality Control Measures

• Process documentation
• Welding procedure specifications (WPS)
• Personnel qualification

8.2 Non-Destructive Testing (NDT) Methods

• Visual inspection
• Radiographic testing (RT)
• Ultrasonic testing (UT)
• Magnetic particle testing (MT)
• Dye penetrant testing (PT)

8.3 Weld Inspection Procedures

• Criteria for acceptance and rejection
• Recording and reporting defects

8.4 Documentation Requirements

• Traceability of materials and processes
• Inspection reports and certificates

9. Summary and Review

• Recap of key concepts
• Integration of topics for practical application

10. Practical Exercises and Case Studies

• Analysis of welding defects and corrective actions
• Material selection scenarios
• Stress analysis problem-solving
• Quality inspection simulations