Asme Section V Article 9 _best_
"The user of this Article shall be responsible for assigning qualified personnel to perform visual examinations to the requirements of this Article."
Recent changes, particularly the mandatory surface preparation clause T-940, have strengthened the standard and aligned it more closely with other NDE methods. For NDT inspectors, welding engineers, quality managers, and pressure vessel fabricators, thorough understanding of Article 9 is essential for code compliance and quality assurance.
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The written procedure must be developed by the manufacturer or fabricator and must detail every variable affecting the inspection quality. It must address: The specific type of components to be examined. The physical configuration and surface conditions required.
are requirements whose change requires requalification of the written procedure by demonstration . For example, changing the technique from direct to remote, or decreasing lighting intensity below the specified range, requires procedure requalification. asme section v article 9
Visual examination (VT) is often the first, and sometimes the only, Nondestructive Testing (NDT) method employed in pressure vessel, piping, and welding fabrication. It is the most economical, versatile, and effective method for finding surface defects, misalignment, and geometric errors. To ensure consistent and high-quality results, the governs these inspections through a dedicated standard.
: A recent and critical update (Clause T-940) makes surface preparation mandatory. Surfaces must be clean, dry, and free of grease or weld spatter before the clock starts on an inspection.
This distinction is critical for understanding Article 9. An inspector may perform a perfect visual examination to every requirement of Article 9, but acceptance or rejection of the component ultimately depends on the criteria established by the construction code.
Documentation of any specialized magnification tools, borescopes, or light meters used, including their calibration status if applicable. Summary of Code Compliance Requirement Parameter Direct Visual Specification Maximum View Distance 24 inches (600 mm) Minimum View Angle 30 degrees Minimum Light Intensity 100 foot-candles (1000 lux) Vision Test Frequency Annual (Every 12 months) Procedure Change Rules Essential variables require complete requalification "The user of this Article shall be responsible
A significant recent change to ASME Section V Article 9 is the addition of for surface preparation before visual inspection. This requirement is now clearly defined and mandatory .
Any surface indication found must be evaluated based on the acceptance standards of the referencing code (e.g., Section VIII allows different defect levels than B31.3). Date of examination. Procedure ID and Revision. Component or weld identification. Inspector's name and qualification level. Equipment used. Results (Accepted/Rejected). Sketch or photo of defects (if required). Summary of Key Requirements (T-940) Requirement Procedure Written Procedure Required Vision Test Annual J-1 Jaeger-type Test Direct Distance Direct Angle >30∘is greater than 30 raised to the composed with power Lighting Cleaning Required before examination Common Inspection Challenges Limited Access: Difficulty getting the eye within (requires remote tools).
Familiarity with the specific procedures, tools, and acceptance standards. 3. Techniques: Direct vs. Remote Visual Examination
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? It must address: The specific type of components
According to Paragraph T-920, visual examinations must be conducted according to a written procedure. Written Procedure Requirements
ASME Section V, Article 9 provides the foundational requirements for Visual Examination (VT)
Personnel performing VT must demonstrate their ability to conduct the examination, typically requiring:
