High-Pressure Piping Welding Inspector Course — 5-Day Training Outline

Course Overview

The High-Pressure Piping Welding Inspector Course is an intensive 5-day (40-hour) professional training program designed for welding inspectors, piping engineers, quality control personnel, and maintenance supervisors working in oil & gas, petrochemical, power generation, and industrial plant environments. Participants will gain the skills to inspect, evaluate, and certify high-pressure piping welds in compliance with internationally recognized codes including ASME B31.1, ASME B31.3, API 570, and ASME Section IX.

Target Audience: Welding Inspectors, QA/QC Engineers, Piping Supervisors, Plant Inspectors, NDT Technicians
Prerequisites: Basic knowledge of welding processes; relevant field experience recommended
Certification Awarded: High-Pressure Piping Welding Inspector Certificate of Competency
Duration: 5 Days | 40 Hours | 8 Hours/Day

📅 Day 1 — Codes, Standards & High-Pressure Piping Fundamentals

Learning Objective: Understand the regulatory framework and technical foundation of high-pressure piping systems.

Topics Covered:

• Introduction to high-pressure piping welding inspection: roles, responsibilities, and industry requirements

• Overview of applicable codes and standards: ASME B31.1 (Power Piping), ASME B31.3 (Process Piping), ASME B31.3 Chapter IX (High-Pressure Piping), API 570 (In-Service Inspection)

• Classification of piping systems: pressure ratings, fluid categories, design temperature ranges

• Piping materials: carbon steel, alloy steel, stainless steel, P-numbers and F-numbers per ASME Section IX

• Pipe components: fittings, flanges, valves, gaskets — materials and pressure class selection

• Introduction to pressure-temperature ratings and piping design calculations

• Safety requirements for high-pressure piping environments

Practical Activity: Code identification exercise — locating key requirements in ASME B31.3 and API 570

📅 Day 2 — Welding Processes, WPS & Welder Qualification

Learning Objective: Review welding processes applicable to high-pressure piping and understand procedure and welder qualification requirements.

Topics Covered:

• Welding processes used in high-pressure piping: SMAW, GTAW (TIG), GMAW, FCAW, SAW — applications and limitations

• Understanding Welding Procedure Specifications (WPS): essential and non-essential variables

• Procedure Qualification Records (PQR): mechanical testing requirements, test coupon acceptance criteria

• Welder Qualification Test Records (WQTR): qualifying welders per ASME Section IX

• Joint design and fit-up requirements: bevel angles, root gaps, alignment tolerances

• Preheat requirements for high-pressure piping: carbon equivalent, minimum preheat temperatures per ASME B31.1 / B31.3

• Welding consumables: selection, storage, control, and traceability

• Common welding defects: causes, prevention, and impact on high-pressure piping integrity

Practical Activity: WPS/PQR review exercise — identifying essential variable changes that require requalification

📅 Day 3 — Non-Destructive Examination (NDE) for High-Pressure Piping

Learning Objective: Apply NDE methods to detect welding discontinuities and evaluate piping weld integrity.

Topics Covered:

• NDE method selection criteria for high-pressure piping per ASME B31.3 and API 570

• Visual Testing (VT): pre-weld, in-process, and post-weld visual inspection requirements

• Liquid Penetrant Testing (PT): procedure, surface preparation, acceptance criteria

• Magnetic Particle Testing (MT): technique, equipment, and defect detection capability

• Radiographic Testing (RT): film interpretation, image quality indicators (IQI), acceptance criteria per ASME B31.3 Table 341.3.2

• Ultrasonic Testing (UT): straight beam, angle beam, and TOFD — application in high-pressure piping

• Phased Array Ultrasonic Testing (PAUT): introduction and application

• Weld rejection criteria and disposition: repair, replace, or accept-as-is engineering justification

• NDE personnel qualification: ASNT SNT-TC-1A and ISO 9712 requirements

Practical Activity: RT film interpretation workshop — identifying weld defects from real radiographic films

📅 Day 4 — PWHT, Pressure Testing & Defect Assessment

Learning Objective: Apply post-weld heat treatment and pressure testing requirements to ensure piping system integrity.

Topics Covered:

• Post-Weld Heat Treatment (PWHT): purpose, code requirements per ASME B31.1 and B31.3, temperature ranges for P-number materials

• PWHT exemptions and alternatives: butter welding, low-hydrogen methods

• Hardness testing after PWHT: Vickers, Brinell, and portable hardness testing methods

• Pressure Testing: hydrostatic vs. pneumatic testing — requirements, procedures, safety precautions

• Leak testing methods: bubble test, halogen test, helium mass spectrometry

• In-service inspection principles: corrosion monitoring, degradation mechanisms, remaining life calculation per API 570

• Fitness-for-service (FFS) concepts: API 579 introduction, flaw acceptance assessment

• Case studies: high-pressure piping failures, root cause analysis, lessons learned from real incidents

Practical Activity: PWHT documentation review and pressure test calculation exercise

📅 Day 5 — Inspection Documentation, Reporting & Final Assessment

Learning Objective: Produce professional inspection reports and demonstrate course competency.

Topics Covered:

• Inspection and test plans (ITP): development, implementation, and hold/witness/review points

• Weld map development and weld traceability documentation

• Material traceability and mill test report (MTR) verification

• Non-conformance reports (NCR): issuance, corrective actions, and closure

• Inspection record requirements per ASME B31.3 and API 570: what to retain and for how long

• Digital inspection tools: electronic forms, QR code traceability, piping inspection software

• Roles of the authorized inspection agency (AIA) and third-party inspector

• Exam preparation review: key codes, critical definitions, formula recap

Final Assessment: Written exam (multiple choice + short answer) and documentation review practical

🎓 Course Outcomes

Upon successful completion of this High-Pressure Piping Welding Inspector training, participants will be able to:

✅ Interpret and apply ASME B31.1, B31.3, Section IX, and API 570 in the field
✅ Review, approve, and audit WPS, PQR, and WQTR documentation
✅ Specify and evaluate appropriate NDE methods for high-pressure piping welds
✅ Monitor and verify PWHT and pressure testing activities
✅ Generate compliant inspection reports, NCRs, and weld documentation packages
✅ Identify and disposition weld defects per applicable code acceptance criteria

This course is ideal for professionals seeking to advance their careers in piping inspection, welding quality assurance, or plant integrity management across the oil & gas, power, and petrochemical industries.