What is the interval for NDT testing, noted as five years, with the possibility of more frequent testing based on usage?

• A. Every two years
• B. To be completed on a 5 year interval, the end user may require to have the device tested more frequently depending on usage
• C. Annually
• D. Every ten years

Answer: (B)

Non-destructive testing intervals are set by balancing safety with practicality, using a baseline that ensures critical components are checked without excessive downtime. A five-year baseline means the device should be tested at least every five years to catch aging or wear that could compromise integrity. However, if the unit experiences higher usage, more cycles, harsher service conditions, or any signs of damage, the inspection interval should be shortened so problems can be detected early before failure. This approach protects reliability while allowing flexibility for different operating conditions. Therefore, the description that the device is tested on a five-year interval with the possibility of more frequent testing based on usage accurately reflects how NDT schedules are typically managed.