What is the maximum inspection interval for clean/non fouling service PRD's?

What is the maximum inspection interval for clean/non fouling service PRD's?

• A. 5 years
• B. 15 years
• C. 10 years
• D. 20 years

Answer: (C)

In clean/non-fouling service, the likelihood of deposits, clogging, and accelerated corrosion is lower, so the inspection interval for PRDs can be longer while still maintaining safety and reliability. The maximum interval allowed for these devices is ten years, reflecting that reduced risk. If the device were in fouling or corrosive service, the interval would need to be shorter due to higher degradation and clogging risks, requiring more frequent inspection and testing. During the inspection, ensure the device’s set pressure is correct, the body and passages are free of damage or residue, and the relief mechanism can operate as designed.

In clean/non-fouling service, the likelihood of deposits, clogging, and accelerated corrosion is lower, so the inspection interval for PRDs can be longer while still maintaining safety and reliability. The maximum interval allowed for these devices is ten years, reflecting that reduced risk. If the device were in fouling or corrosive service, the interval would need to be shorter due to higher degradation and clogging risks, requiring more frequent inspection and testing. During the inspection, ensure the device’s set pressure is correct, the body and passages are free of damage or residue, and the relief mechanism can operate as designed.