PEI Degradation Management - Theory

This online manual explains the background theory of Degradation Management: What Degradation Management is. What Degradation Mechanisms (DMs) are. What Barriers are. What a Corrosion Management Framework (CMF) is.  How Corrosion Loo...

Degradation Management is a continuous work process. The figure below depicts this process in IMS.  The continues Degradation Management Work Process as implemented in IMS.  The S-RBI Analysis is implemented on the Component lev...

Degradation Management is about managing Degradation Mechanisms (DMs). So what really defines a DM? Let's have a look: Definition According to the British Standards terminology, degradation is defined as the “ detrimental change in physical condit...

As mentioned in Degradation Classification , the DMs can be classified in terms of the failure characteristics (see the figure below): Age-Related (AR) failures (e.g., Pitting, general Corrosion ), and Non-Age-Related (NAR) failures (e.g., Crac...

Age-Related Degradation Mechanisms are mostly Corrosion mechanisms, with two exceptions: Creep (e.g., fired heater tubes), and Low-Cycle Fatigue or Cyclic Loading (e.g., pressure-swing absorber vessel). Remnant Life For Corrosion, the time to ...

Degradation Management is about verifying Barriers in order to manage the risk of threats.  Definition The threats are, of course, caused by the Degradation Mechanisms and Barriers are risk controls or recovery measures. Barriers provide th...

During the Threat and Barrier identification, Equipment and piping within a site’s unit or plant, with similar Degradation Mechanisms (DMs) , should be grouped into manageable sections that can be monitored. In IMS these groups are called Corrosion...

The Integrity Operating Windows (IOWs) are defined as limits on process variables, beyond which the operating facility integrity deteriorates rapidly, leading to unsafe conditions. Impact can be a shortening of the remaining lifecycle of the asset a...

Risk-Based Inspection (RBI) is a risk-based approach to the inspection of Pressure Equipment in the Oil and Gas industry. This type of inspection analyses the Susceptibility to (likelihood of) Failures (StF), and the Consequences of the same Failu...

NACE International, NACE SP 0472-2015-SG - Methods and Controls to Prevent In-service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments , 2015. BS-EN-13306-2010 - Maintenance Terminology, 2010.  A...