American Petroleum Institute

Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems - Third Edition
 N 570 CHINESE

Annotation

GENERAL APPLICATION

Coverage

API 570 covers inspection, repair, alteration, and rerating procedures for metallic piping systems that have been in-service.

Intent

API 570 was developed for the petroleum refining and chemical process industries but may be used, where practical, for any piping system. It is intended for use by organizations that maintain or have access to an authorized inspection agency, a repair organization, and technically qualified piping engineers, inspectors, and examiners, all as defined in Section 3.

Limitations

API 570 shall not be used as a substitute for the original construction requirements governing a piping system before it is placed in-service; nor shall it be used in conflict with any prevailing regulatory requirements.

SPECIFIC APPLICATIONS

Included Fluid Services

Except as provided in 1.2.2, API 570 applies to piping systems for process fluids, hydrocarbons, and similar flammable or toxic fluid services, such as the following:

a. Raw, intermediate, and finished petroleum products.

b. Raw, intermediate, and finished chemical products.

c. Catalyst lines.

d. Hydrogen, natural gas, fuel gas, and flare systems.