| Requirement | Essential Variable | Nonessential Variable | |-------------|:-----------------:|:---------------------:| | Change in technique used (direct to/from translucent) | ✓ | | | Direct to remote | ✓ | | | Remote visual aids | ✓ | | | Personnel performance requirements (when required) | | ✓ | | Lighting intensity (decrease only) | ✓ | | | Configurations to be examined and base material product forms (pipe, plate, forgings, etc.) | ✓ | | | Lighting equipment | | ✓ | | Methods or tools used for surface preparation | | ✓ | | Equipment or devices used for a direct technique | | ✓ | | Sequence of examination | | ✓ | | Personnel qualifications | | ✓ |
establishes the fundamental purpose of Article 9:
The written procedure must, as a minimum, contain the requirements listed in . These include:
Methods used to clean the surface (e.g., wire brushing, grinding, or solvent wiping). The surface must be free of slag, scale, dirt, or grease that could mask defects. asme section v article 9
Article 9 of Section V is dedicated exclusively to Visual Examination, abbreviated as within the Code. While visual inspection is often the most straightforward NDE method, its proper execution is far from simple. The article outlines the methods and requirements for visual examination applicable when specified by a referencing Code Section. It details the types of visual examinations, the necessity for written procedures, and the qualifications required for personnel.
The most severe. Any linear indication with a sharp tip. Article 9 requires that examiners be trained to detect "lack of fusion" and "cracks" using visual means, often requiring a 5x to 10x magnification device if the acceptance criteria requires it.
While the acceptance criteria are given by other codes, ASME Section V Article 9 provides the method for detecting a range of surface discontinuities. A qualified inspector is typically looking for: | Requirement | Essential Variable | Nonessential Variable
Article 9 is applicable across a wide range of scenarios:
The scope of Article 9 is clearly defined in Paragraph T-910. Specific visual examination procedures required for every type of examination are not included in this Article, because there are many applications where visual examinations are required. Examples of these applications include nondestructive examinations, leak testing, in-service examinations, and fabrication procedures.
Color perception testing is also required where color-coded indications are evaluated (for example, liquid penetrant testing performed alongside VT). Article 9 of Section V is dedicated exclusively
By 2026, technology has integrated deeper into visual testing. While Article 9 remains strict, industry practice now often uses:
The 2023 ASME BPVC includes significant changes across multiple Sections, including Section V. ASME publishes "Summary of Significant Changes" volumes that explain each change, the reason for the action, and the value to the Code user.