Certified API 510 Pressure Vessel inspectors must have a broad knowledge base on pressure vessel maintenance, inspection, repair, and alteration. The API 510 examination is designed to determine if individuals have such knowledge. This certification program benefits employers and the industry as a whole by helping to: Improve management control of process unit operation, repair, and maintenance Reduce the potential for inspection delays Provide a continued high level of safety through the use of highly specialized and experienced inspectors