For global operations, note that ISO 12100 (Risk assessment) and ISO 13857 (Safety distances) have largely superseded the old B15.1 approach. Many multinational companies now use ISO standards for machine guarding because they provide a performance-based framework rather than a prescriptive one.
If you have typed into a search engine, you are likely an engineer, safety manager, plant operator, or maintenance technician looking for critical machinery safeguarding regulations. You need the official standard to ensure compliance with OSHA regulations, reduce workplace injuries, or pass an insurance audit. Asme B15.1 Pdf