The API 570 Piping Inspection Code, developed and published by the American Petroleum Institute (API), sets the standard for the in-service inspection, repair, and alteration of metallic and fiberglass-reinforced plastic (FRP) piping systems, as well as their associated pressure-relieving devices. The code applies to piping systems handling process fluids, chemical products, natural gas, high-pressure gases, and other flammable or toxic fluids. Established in 1993, API 570 provides guidelines to ensure the safety and mechanical integrity of piping systems after they have been commissioned.
API 570 does not apply to decommissioned piping systems but does cover systems that are temporarily out of service and expected to be recommissioned in the future. The code also includes provisions for certain piping systems below specific thresholds or those involving water services, where inspections may be optional.
In addition to setting technical standards, API 570 includes a certification program to recognize individuals with expertise in the repair, maintenance, inspection, and alteration of in-service metallic piping systems. To obtain certification, candidates must pass a two-part examination. Certified inspectors are required to recertify every three years to maintain their credentials.