| Tool | Purpose | |------|---------| | Weld gauge (Cambridge type) | Measure reinforcement height, undercut depth, fillet weld leg/throat | | Hi-lo gauge | Measure internal misalignment at butt welds | | Pit gauge | Measure corrosion pit depth | | Magnifying lens (5–10x) | Examine suspect indications | | Flashlight/torch | Illuminate weld surfaces and root areas | | Mirror (dental or telescoping) | View root side of welds without crawling | | Borescope/videoscope | Internal pipe inspection, small-bore piping |
ASME Section V, Article 9, is the cornerstone of quality assurance for pressure equipment. It elevates visual inspection from a casual glance to a verifiable, standardized NDE method. By mandating annual vision tests for inspectors, enforcing strict lighting and access criteria, and now requiring detailed surface preparation, Article 9 ensures a high level of reliability in detecting surface-breaking flaws. For any engineer, inspector, or QC professional working within the ASME framework, a thorough understanding of Article 9 is not just a requirement but a fundamental skill for ensuring the safety and integrity of industrial components.
establishes the mandatory requirements for conducting visual examinations (VT). As part of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC), this article standardizes how inspectors detect surface discontinuities, flaws, or misalignments in critical components. Because visual inspection is the most fundamental non-destructive examination (NDE) method, strict adherence to Article 9 is essential for ensuring structural integrity and regulatory compliance.
, a critical non-destructive examination (NDE) method used to ensure the integrity of pressure vessels and welded joints. 🛠️ Key Procedural Requirements To be compliant, every visual inspection must follow a written procedure that includes: Essential Variables
The procedure shall contain or reference a report demonstrating that the examination procedure was adequate. In general, , an artificial imperfection, or a simulated condition may be considered as a method for procedure demonstration.
It is mandatory when referenced by other ASME code sections (e.g., Section I, III, VIII) or by engineering specifications.
Depending on the component material and finish, procedures may require: Wire brushing or grinding (to remove slag and rust). Solvent wiping (to remove grease and oil).
Insufficient illumination masks surface cracks.
This article provides an in-depth overview of Article 9 requirements, procedures, personnel qualifications, and compliance strategies for 2026. 1. What is ASME Section V, Article 9?
