ASME BPVC provides the foundational requirements for Visual Examination (VT) in the pressure vessel and piping industry . It focuses on how to perform the inspection, while referencing codes (like Section VIII or B31.3) dictate the acceptance criteria and scope. 1. Types of Examination
Before a procedure is used in production, it must be demonstrated to the satisfaction of the Authorized Inspector (AI). This "proof of method" often involves identifying a specific defect or target (like a 1/32" black line on an 18% neutral gray card) under the exact conditions of the actual test. The final report must include: and time of the examination. Procedure identification used for the test. Results indicating whether the part passed or failed. Inspector identification and certification level. Summary Table: Article 9 Key Requirements Requirement Specification Minimum Light Intensity 100 foot-candles (1076 lux) Max Viewing Distance 24 inches (600 mm) Minimum Viewing Angle 30 degrees Vision Test Frequency Annual (every 12 months) Surface Condition Clean and free of obstructions asme section v article 9