Although modern editions of Section V have streamlined some descriptive text, the technical requirements established by Article 9 regarding viewing conditions remain essential.
Visual Examination (VT) is the most frequently performed and arguably the most important nondestructive examination (NDE) method in pressure equipment and piping fabrication. Within the ASME Boiler and Pressure Vessel Code (BPVC), all roads for visual inspection lead to . This article serves as a master guide for how to perform these critical inspections. It defines the "how," while the referencing code sections (like ASME Section VIII for pressure vessels or ASME B31.3 for process piping) provide the acceptance criteria for what is acceptable.
Changes in the specific manufacturer or brand of the visual aid (provided the technical capabilities remain identical).
Inadequate lighting is a primary cause of missed defects. Article 9 establishes strict quantitative baselines for illumination: asme section v article 9
VT requirements with Magnetic Particle (MT) or Penetrant Testing (PT).
Do you need a tailored for a particular referencing code like ASME Section VIII or B31.3?
Modifying the pre-cleaning method from wire brushing to grinding (provided surface integrity is maintained). Although modern editions of Section V have streamlined
Article 9 of ASME Section V provides guidelines for the radiographic examination of welds in boilers and pressure vessels. The article outlines the requirements for radiography, including the preparation of the surface to be examined, the selection of radiographic techniques, and the interpretation of radiographic images.
Article 9 divides visual testing into two primary methodologies depending on access to the component. Direct Visual Examination
To check joint alignment, fit-up, and cleanliness. This article serves as a master guide for
An NDE method is only as reliable as the individual performing it. Article 9 requires that personnel be trained, qualified, and certified in accordance with the referencing code section (typically pointing to frameworks like SNT-TC-1A or ISO 9712).
All visual examinations must be performed in accordance with a written procedure that includes, among other things, the qualifications of the personnel who are authorized to perform the exams. The organization (typically the employer) is responsible for ensuring inspectors are qualified. Depending on the referencing code (e.g., ASME B31.3), some personnel may require certification.
Internal and external surfaces of vessels, pumps, and valves. Mechanical assemblies and structural attachments.
The requirements for equipment calibration
Used to quantify undercuts or mismatch more accurately than manual gauges. 4. Evaluation and Documentation