5 Levels of Risk Analysis. How many do you have?

5 Levels of Risk Analysis. How many do you have?

Mission Impossible, Why new RBI?
Equipment risk analysis is a core activity in plant risk management. Many spears were broken about prioritizing individual equipment monitoring and risk controls, to ensure its safe and reliable operation. We have arrived to the capability of performing risk assessments at 5 levels of depth. This multi-level approach enables a two-fold cost/benefit optimization: analysis cost is minimized and a risk cost analysis is enabled where required. This article shows applications to pressure equipment inspection planning (RBI). Drivers for multi-level RBI We naturally recognize two levels of approach to engineering problems: First-pass system screening for criticalityIn-depth analysis of critical elements only This sequence of tasks well optimizes time and efforts. The only precaution is not to get locked into the screening step (1) solely. Critical objects require a detailed analysis (2)…
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What is Gigacycle Fatigue importance for pant operators?

What is Gigacycle Fatigue importance for pant operators?

Uncategorized, Why new RBI?
It is known that the 1st fatigue curve was created in XIX century by German engineer August Woehler. He investigated why railroad carriage axles fail in a delayed manner. The Woehler's phenomenological fatigue model was correct and remains generally valid now. However, there are some additional limitations and improvement ideas, which are necessary for practical vibration fatigue predictions. Misconceptions first Consider the above graph meaning: The Number of stress cycles to failure (N) is a function of the Stress amplitude in each cycle (S). More stress means less life, as shown by the red line. The yellow line simulates a constant amplitude fatigue limit. Finally, the green line is the variable amplitude stress cut-off, e.g. no fatigue damage is assumed in design for lower stresses. The historical reason for the…
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Why new RBI?

Why new RBI?

Why new RBI?
Here we start a new series of posts which explain what exactly is offered by our New Generation Asset Integrity strategy and tactics. Please don't hesitate to communicate your thoughts or critics. Welcome aboard our rocket ship! Issues with traditional RBI? Risk Based Inspection planning (RBI) is on the scene for decades. Its rightful concept of proportioning integrity budgets to failure risks is a great common-sense solution for cost optimization. The ever increasing budget savings pressure highlighted one major inability of the published RBI methodologies though. Financial management of industrial plants has set a question, which integrity management personnel can't reply: 'How much budget saving results from integrity management costs?' What happens is that both parties - integrity responsible and finance responsible - are striving to adopt a correct decision,…
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