An item that is not in accordance with specified codes, standards or other requirements.

  • NOTE: A non-conformance does not necessarily mean that the item is defective or that the item is not suitable for continued service.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards



An unacceptable deviation or a failure against internally or externally defined specifications or requirements related to a product, service or process.

Specifications or requirements may be defined internally through the management systems, standards and other requirements of the company; or externally, typically by regulatory bodies, customers or other stakeholders.

A non-conformance normally results in the need for corrective action.

Source: IOGP Report No. 510, Operating Management System Framework for controlling risk and delivering high performance in the oil and gas industry, International Association of Oil & Gas Producers, June 2014. Global Standards



Non-fulfilment of a specified requirement.

Source: API SPEC 11D1, Packers and Bridge Plugs, Upstream Segment, Second Edition, July 2009. Global Standards

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