Microsoft Word 570 e4 Addendum 1 Date of Issue May 2017 Affected Publication API 570, Piping Inspection Code In service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, Fe[.]
Date of Issue: May 2017 Affected Publication: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016 Addendum Page 31, Section 5.6.2, second paragraph, last sentence, shall read: For systemized/circuitized piping, the corrosion rates and remaining life may be determined statistically per paragraph 6.5.3 Page 33, Section 5.7.1, first paragraph, fifth sentence, shall read: Ultrasonic thickness measurements taken on small bore pipe may require specialized equipment (e.g miniature transducers and/or curved shoes as well as diameter-specific calibration blocks); however, Profile RT is typically the method of choice for thickness measurements on small bore piping Page 41, Section 5.13, fourth paragraph, second sentence, shall read: Critical check valves shall be adequately inspected or tested to provide greater assurance that they will prevent flow reversals Page 46, Section 6.3.4.1, first paragraph, last sentence, shall read: When pipe service conditions change, pipe classifications and inspection plans should be reviewed and updated as necessary to reflect the changed operating conditions; e.g a hydrocarbon service temperature increase that might change from “slowly vaporizing during a release” to “rapidly vaporizing during a release.” Page 46, Section 6.3.4.2e, shall read: Hydrofluoric acid in main and trace acid services per API RP 751 Page 54, Section 7.1.2, second equation (Short term corrosion rate), shall read: