Api 580 Exam Study Guide

absolute risk - Answer- An ideal and accurate description and quantification of risk. acceptable risk - Answer- A level of risk that is acceptable to the owner-user. ALARP - as low as reasonably practical - Answer- A concept of minimization that postulates that attributes (such as risk) can only be reduced to a certain minimum under current technology and with reasonable cost. components - Answer- Parts that make up a piece of equipment or equipment item. For example a pressure boundary may consist of pipe, elbows, nipples, heads, shells, nozzles, stiffening rings, skirts, supports, etc. that are bolted or welded into assembles to make up equipment items. consequence - Answer- An outcome from an event. There may be one or more these from an event. They may range from positive to negative. However, they are always negative for safety aspects. They may be expressed qualitatively or quantitatively. corrosion specialist - Answer- A qualified person in the specific process chemistries, corrosion degradation mechanisms, materials selection, corrosion mitigation methods, corrosion monitoring techniques, and their impact on pressure equipment. cost-effective - Answer- An activity that is both effective in resolving an issue (e.g. some form of mitigation) and is a financially sound use of resources. This type of inspection plan should include type, scope, and timing. damage (or deterioration) mechanism - Answer- A process that induces micro and/or macro material changes over time that are harmful to the material condition or mechanical properties. They are usually incremental, cumulative, and, in some instances, unrecoverable. Common types include corrosion, stress corrosion cracking, creep, erosion, fatigue, fracture, and thermal aging. damage (or deterioration) mode - Answer- The physical manifestation of damage (e.g. wall thinning, pitting, cracking, rupture). damage tolerance - Answer- The amount of deterioration that a component can withstand without failing.