Inspectioneering Journal

The Future Direction of API RP579 and its Relationship with other API Codes and Recommended Practices

By Gerrit Buchheim, P.E., Corrosion & Materials Expert and Pono Division Manager at Becht. This article appears in the March/April 2000 issue of Inspectioneering Journal.

The release of API RP 579 will bring about some changes to other existing API Codes and Recommended Practices. The long-range plan is to offer an integrated suite of API Codes and Recommended Practices, where information is presented once and the other documents refer and are linked to that information. The In-Service Inspection Codes in the US for petrochemical pressure containing equipment are:

  • API 510 - Pressure Vessels
  • API 570 - Piping
  • API 653 - Tankage, and
  • ANSI NB-23 (NBIC) - Pressure Vessels & Piping.

Up to very recently, these codes imposed an inspection interval based on equipment condition with a maximum inspection interval based on corrosion rates. API 510, 570, and 653 were revised to allow the use of Risk Based Inspection methodologies as an alternative to set inspection intervals. This is a fundamental change.

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