API 570 establishes requirements and guidelines that allow owners or users of piping systems to maintain the safety and mechanical integrity of their systems after they have been placed into service. While it was primarily intended for those systems in the petroleum and chemical process industries, this code can be applied to any piping system where practical.

This code also covers pipelines that carry process fluids, hydrocarbons, and other flammable or toxic fluids. Some specific fluids covered include: petroleum and chemical products, natural gas, flare systems, sour water, high pressure gasses and several others. This standard specifically does not govern the construction of pipelines or set forth any standards relating to them before they are placed into service. In the event of any conflicting standards of regulations, API 570 should take precedence in cases where it is the more stringent requirement.

The application of this inspection code is restricted to owner/users that employ or have access to the following technically qualified individuals and organizations:

a. An authorized inspection agency.
b. A repair organization.
c. An engineer.
d. An inspector.
e. Examiners.