
: Inspection of Welded I-Beams
Project Overview:
Conduct a series of non-destructive examinations and dimensional checks on welded I-
beams to verify the structural integrity, detect surface and subsurface defects, and ensure
dimensional accuracy. These inspections include Visual Inspection (VT), Magnetic Particle
Inspection (MT), Dimensional Inspection (DI), and Phased Array Ultrasonic Testing (PAUT).
All inspections will comply with applicable standards and client specifications.
Inspection Procedures:
1. Visual Inspection (VT):
• Objective: Identify visible surface discontinuities, including cracks, porosity,
lack of fusion, and weld undercuts.
• Procedure:
• Perform a detailed visual inspection of welded areas and the surrounding
heat-affected zone.
• Use calibrated tools (such as magnifying lenses, rulers, and weld gauges) for
measurements and verification.
• Record and photograph any observed defects.
• Compare findings against acceptance criteria as per the project
specifications or relevant code standards (e.g., AWS D1.1 or ASME).
2. Magnetic Particle Inspection (MT):
• Objective: Detect surface and near-surface defects such as cracks or laps in
the welded I-beam, particularly in the weld toes and fusion lines.
• Procedure:
• Clean and prepare the surface for inspection.
• Apply magnetic field using yoke or prod technique, depending on beam
geometry.
• Apply dry or wet magnetic particles (fluorescent or non-fluorescent)
depending on accessibility and lighting.
• Inspect and document any indications under appropriate lighting (UV light for
fluorescent particles).
• Compare findings against the acceptance criteria in the relevant standards.
3. Dimensional Inspection (DI):• Objective: Verify the dimensional accuracy of welded I-beams as per design
specifications.
• Procedure:
• Measure key dimensions such as flange width, web thickness, overall height,
weld bead size, and straightness of the beam.
• Use precision measuring tools like calipers, micrometers, and laser
measuring devices.
• Record measurements and compare them to design tolerances.
• Document any out-of-tolerance measurements for potential corrective