Article 9 does not contain acceptance criteria itself—that responsibility belongs to the referencing Code Section or client specification. Instead, Article 9 ensures that visual examinations are performed systematically, consistently, and reliably, regardless of the application.
: Looking directly at the surface, often within 24 inches and at an angle no less than 30 degrees.
The eye must be within 24 inches (600 mm) of the surface being examined.
Article 9 defines the procedures for visual examination when specified by a referencing code section (such as Section VIII for pressure vessels or B31.3 for process piping). It serves as a procedural guide ("how to") rather than an acceptance standard ("pass/fail"); acceptance criteria are always found in the referencing code. Common applications include: Weld Inspection: asme section v article 9
If you are looking for acceptance criteria for a pressure vessel weld, do not look in Article 9. Article 9 will tell you how bright your light must be (100 foot-candles minimum) and how long you must stare (retinal persistence), but it will not tell you if a crack is allowed. For that, you must refer to the referencing Code Section (e.g., ASME Section VIII, Div. 1, Table UW-35).
As the ASME Boiler and Pressure Vessel Code continues to evolve, Article 9 will adapt to incorporate emerging technologies while maintaining its essential role in safeguarding industrial safety. Whether applied to a small pressure vessel, a complex nuclear component, or a critical pipeline, the principles enshrined in Article 9 remain constant: qualified personnel, validated procedures, adequate viewing conditions, proper surface preparation, and thorough documentation.
A: Only when specifically referenced by another Code Section. For example, ASME B31.3 requires 100% visual examination of all piping welds. ASME Section VIII requires visual examination as specified in its own paragraphs. Article 9 does not contain acceptance criteria itself—that
ASME Section V tells you how to perform the examination. The acceptance or rejection criteria are governed by the referencing construction or client code (such as ASME Section VIII for pressure vessels, ASME B31.3 for process piping, or API standards).
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At a minimum, the written procedure must address the following elements: The specific surfaces and configurations to be examined. The personnel qualification requirements. The exact surface preparation techniques to be used. The eye must be within 24 inches (600
To comply with Article 9, an inspector needs:
Identifying corrosion, erosion, and physical damage in valves, boilers, and piping. Leak Testing: Monitoring for visible leaks during pressure tests. 2. General Requirements for Procedures
This article provides a detailed breakdown of Article 9, outlining its scope, procedural requirements, personnel qualification standards, and technical application parameters. 1. Scope and Applicability of Article 9