How often is the National Board Inspection Code (NB-23) updated?

• A. Every year
• B. Every two years
• C. Every five years
• D. Every ten years

Answer: (C)

The National Board Inspection Code (NB-23) is updated every five years to ensure that it reflects current practices, technologies, and industry standards in the field of boiler and pressure vessel inspections. This timeframe allows for comprehensive reviews and the incorporation of feedback from stakeholders to enhance safety and compliance measures. The five-year interval strikes a balance between maintaining up-to-date standards and giving professionals ample time to adapt to changes without frequent disruptions. The structured update schedule contributes to the integrity and reliability of the code, ensuring that it remains relevant and effective in guiding inspections and certifications.