Asme Section V Article 9 -
If an is changed, the written procedure must be completely requerified and rewritten. If a nonessential variable is changed, the procedure only requires an amendment or revision.
The eye must be within 6 in. – 24 in. (150 mm – 600 mm) of the surface.
Personnel are required to demonstrate annual completion of a J-1 Jaeger-type eye vision test, which covers both near vision and color contrast differentiation. C. Surface Preparation (T-930)
ASME Section V, Article 9 acts as the foundational standard for visual inspection in pressure equipment manufacturing and maintenance. By mandating written procedures, annual vision tests, and specific viewing requirements, it ensures that visual examination is a disciplined, rigorous NDT method rather than just a quick look-over. If you asme section v article 9
Checking alignment, joint preparation, and fit-up tolerances.
The inspection procedure must be demonstrated to show it can effectively detect the relevant defects. 2.3 Personnel Certification and Vision Test
Direct visual examination may usually be made when: If an is changed, the written procedure must
Checking weld reinforcement, joint alignment, and overall component dimensions.
The article specifies the acceptance criteria for radiographic examinations, including:
Article 9 is not a standalone code. It becomes mandatory only when specifically referenced by a referencing Code Section (such as ASME Section I for Power Boilers, Section VIII for Pressure Vessels, or B31.1/B31.3 for Piping Systems). The referencing code dictates when to inspect and what acceptance criteria to apply. 2. Written Procedure Requirements – 24 in
When direct access is impossible (e.g., inside a small-bore pipe or a confined space), remote visual aids may be used. This includes devices like borescopes, fiberscopes, videoscopes, or camera systems. The equipment must provide image quality and resolution equivalent to direct visual examination and allow for viewing at the required angles and distances.
The effectiveness of Article 9 relies heavily on the skill of the inspector.
Visual examination must be performed in accordance with a written procedure. According to Paragraph T-940 , minimum information must include: Scope of the examination. Method of inspection (direct or remote). Personnel qualifications. Surface preparation methods. Equipment used (e.g., lighting, gauges). Acceptance standards (e.g., ASME Section VIII, Div 1). B. Personnel Qualification
Exact numeric limits vary with weld type, thickness, and code edition — always consult the current ASME Section V Article 9 tables and supplementary notes.
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