For a more academic or summarized look, these platforms host useful papers and previews: BS EN ISO 17637 Preview PDF - Scribd
ISO 17637 is a standard that outlines the requirements for radiographic testing of welds, including the preparation of test specimens, the testing procedure, and the evaluation of test results. The standard is applicable to various industries, including construction, manufacturing, and oil and gas, where welded joints are critical to the structural integrity of equipment and structures. iso 17637 pdf