API RP 583 - Corrosion Under Insulation and Fireproofing

Last update: Jan 16, 2017

API RP 583, Corrosion Under Insulation and Fireproofing, covers the design, maintenance, inspection and mitigation practices for pressure equipment, piping, and storage tanks due to external Corrosion Under Insulation (CUI) and Corrosion Under Fireproofing (CUF). The recommended practices in this standard are intended to provide the user with information that will improve plant reliability by describing all the variables that give rise to CUI including: temperature, coating type and age, insulation types, climate effects, insulation maintenance practices, etc. and provide a method of risk ranking equipment for CUI potential based on the primary factors that affect the potential for CUI.

It will cover External Chloride Stress Corrosion Cracking (ECSCC) of stainless steels under insulation, as well as general and localized metal loss of carbon and low alloy steels. It will also cover all the more modern methods of nondestructive examination (NDE) for inspection for CUI without having to remove the insulation.

Relevant Links

Recommend changes or revisions to this definition.


Join 8,000+ fellow asset integrity professionals! Get Inspectioneering's latest information straight to your inbox. Enter your information below:

New and Revised Editions of API Standards Just Published
June 2, 2014 By John Reynolds at Intertek

Three new API standards have been published, and one has been revised and updated to a new edition. The standards are described in this post.

Partner Content

It is difficult to cover all inspection applications with basic inspection procedures like radiography, ultrasonics, magnetic particle testing, and dye penetrant inspection. Owner-operators are finding that advanced NDE services such as guided-wave ultrasonics, AUT corrosion mapping, and eddy current testing are essential tools to keep their facilities operating safely and efficiently.

March/April 2014 Inspectioneering Journal

Inspectioneering is pleased to announce that our friend, colleague, author and industry leader, Clay White, has recently taken over as chair of API’s Subcommittee on Inspection (SCI).

December 23, 2013 By Nick Schmoyer at Inspectioneering

Many of you are already aware of some of the changes that have occurred within API this year. For those of you who are not, here’s a quick summary.

September/October 2011 Inspectioneering Journal
By John Reynolds at Intertek

Three new recommended practices (RP) are under way within the API Inspection Subcommittee (SCI) which will add to the list of SCI standards available to owner-users to improve their mechanical integrity (MI) and inspection programs.