It sounds like you are looking for a high-quality reference document or technical paper regarding BS EN 970 (the now-superseded standard for visual inspection of fusion welds) and specifically want a PDF version.
If you are using this standard (or its successor) for inspection, here are the critical technical requirements: Illumination bs en 970 visual inspectionpdf best
An inspector under BS EN 970 doesn't just guess sizes; they use precision tools. These are detailed in Annex A of the standard: It sounds like you are looking for a
While the older standard is still used for reference in legacy projects, current inspections typically follow BS EN ISO 17637 Standards.ie Core Requirements of BS EN 970 / ISO 17637 after welding) 1.4 Key definitions: Imperfection
Visual Inspection (VT) is the oldest, most widely used, and arguably the most important Non-Destructive Testing (NDT) method. In the fabrication industry, it is estimated that over 80% of inspections are performed visually. BS EN 970 (also known as DIN EN 970 or EN 970) is the European standard that specifies the requirements for the visual inspection of fusion welds.
To help you master BS EN 970 visual inspection, here are some valuable PDF resources:
"The best tool is an educated eye."