What is NDT, and what are the types of NDT?

NDT (Non-Destructive Testing) refers to techniques used in the mechanical industry to assess material qualities and identify weld flaws without damaging the parent metal.

Types of NDT

• Visual Test (VT)
• Liquid Penetrant Test (LPT)
• Magnetic Particle Test (MT/MPT)
• Ultrasonic Test (UT)
• Radiographic Test (RT)
• Eddy Current Testing (ET)

Welding Inspection

Welding inspection involves evaluating welds by the Welding Procedure Specification (WPS) to identify discontinuities or defects.

PQR and WPS

WPS (Welding Procedure Specification): WPS is developed for each material alloy and welding type. It includes every aspect of welding.

PQR (Procedure Qualification Record): PQR is a supporting document for WPS. It records test welds to ensure the procedure produces sound welds.

Types of Welding

Welding is a fabrication process that joins materials using high heat with pressure or cooling.

• Pressurized Welding:
• Resistance Welding
• Spot/Seam Welding
• Non - Pressurized Welding:
• ARC Welding - SMAW
• TIG Welding - GTAW
• MIG Welding - GMAW

Scope of Welding Inspector:

Responsibilities:

• Ensure compliance with codes and specifications.
• Witness test piece preparation.
• Check welder qualifications.
• Prepare WPS and PQR.
• Validate welding operator performance qualification (WOST).
• Verify weld consumables, gasses, etc.
• Precheck the need for heat treatment.
• Ensure NDT requirements.
• Prepare necessary documentation and inspection reports.

Benefits of Piping Engineer:

Responsibilities

• Prepare P & ID, Isometric drawings, etc
• Design and build piping systems.
• Understand piping code job opportunities.
• Enhance

Piping Syllabus as per ASNT B31.3, B31.4, ASME 16.5, 16.20, API 570 etc.

Process piping involves designing and installing piping systems in industries such as petroleum, chemical, and pharmaceutical. It focuses on properly functioning pipes rather than building or installing polar piping systems.

Hydro Test and Pressure Test

• Testing Procedures
• Hydrotest: This involves using water as a test medium.
• Pressure test: This pneumatic test uses air or nitrogen as a test medium.