AUTRESONUS
VT

Visual Testing

Systematic visual inspection performed by certified technicians to identify external defects.

Overview

Visual Testing (VT) is the foundation of every NDT programme — a systematic examination performed by qualified inspectors using direct line of sight, optical aids, and remote video equipment. It is the first line of defect detection and a mandatory step in nearly every inspection code worldwide.

How the method works

Direct VT uses the unaided eye, mirrors, and magnifiers under controlled lighting (minimum 1000 lux for critical inspections). Remote VT employs borescopes, drones, and ROV-mounted cameras to access confined spaces, internal vessel surfaces, and subsea structures.

Properly executed VT identifies weld profile defects, undercut, overlap, cracks, corrosion, mechanical damage, and coating breakdown — often eliminating the need for further NDT on clearly defective items and focusing follow-up methods where they add the most value.

Documented VT with high-resolution photography and video is increasingly the backbone of digital integrity management systems, providing the timeline of asset condition that drives risk-based inspection planning.

Why AUTRESONUS for VT

  • CSWIP and ISO 9712 Level II/III welding inspectors on every job.
  • Calibrated lux meters, weld gauges, and high-resolution photographic kits — every observation documented.
  • Remote VT capability via borescope, drone, and ROV partnerships for inaccessible assets.
  • Reports tied directly into integrity management systems for long-term trending.
  • 29+ years interpreting fabrication and in-service welds across heavy industry.

Key Benefits

  • First-line defect screening across all asset types
  • Performed by certified Level II / Level III inspectors
  • Documented photographic and video reports with timestamps
  • Compliant with international codes (ASME, AWS, API, ISO)
  • Cost-effective and immediately actionable
  • Foundation data for risk-based inspection programmes

Our Inspection Process

  1. 1

    Pre-inspection review

    Drawing review, code selection, and acceptance criteria agreed with client.

  2. 2

    Lighting & access setup

    Confirm minimum lux, mirrors, magnification, or remote VT equipment as required.

  3. 3

    Systematic inspection

    Methodical examination against checklist with weld gauges and measurement tools.

  4. 4

    Photographic record

    High-resolution photos and video of all relevant indications with scale references.

  5. 5

    Reporting

    Code-based accept/reject with annotated photographs and recommended follow-up NDT.

Applications

  • Weld profile, root, and cap inspections
  • In-service plant condition surveys
  • Confined space, tank, and vessel internal inspections
  • Coating, painting, and corrosion assessments
  • Pre- and post-fabrication weld audits
  • Drone and borescope-assisted remote inspections

Codes & Standards

ASME V Article 9 ISO 17637 AWS D1.1 API 510 / 570 / 653 BS EN 13018

Need accurate inspection data?

Partner with AUTRESONUS for engineering decisions backed by precise, reliable NDT analysis.

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