Asme Section V Article 9

A radiographic report should include:

In the world of Non-Destructive Examination (NDE), complexity often grabs the headlines. Advanced methods like ultrasonic phased arrays or digital radiography dominate conference talks. However, the backbone of any quality assurance program—the method that finds the most surface defects for the least cost—is Visual Examination (VT) .

Within the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, the rules governing this critical process are found in ASME Section V, Article 9. asme section v article 9

Whether you are a Level II examiner, a welding inspector, or a plant engineer, understanding the nuances of Article 9 is non-negotiable for Code compliance. This article provides a deep dive into the scope, acceptance criteria, examination requirements, and common pitfalls of ASME Section V Article 9.

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. A radiographic report should include: In the world

Article 9 gives interpretation rules and acceptance thresholds tied to type, size, and distribution of indications. Key points commonly applied (refer to the Code for exact values and tables):

Exact numeric limits vary with weld type, thickness, and code edition — always consult the current ASME Section V Article 9 tables and supplementary notes. The most severe

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).