Transcription of A Study Guide - MSTS Training
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A Study Guide - MSTS Training
The Inspector s Most Important Calculations 1 December 2014 A Study Guide for Pressure Equipment Inspectors The Inspector s Calc s corrosion Rates Equipment Remaining Life Inspection Intervals Next Inspection Date The Inspector s Most Important Calculations 2 December 2014 How are these calculations related? An important role for Authorized Inspectors is setting appropriate inspection intervals. Intervals are often based on the Remaining Life of the equipment. The Remaining Life of the equipment is most often determined using the corrosion Rate of the equipment. Thus to set the interval, the inspector must know how to determine the corrosion Rate and Remaining Life. Why are these calculations important? During the API certification exam, you will perform many calculations. retirement thickness, hydrotest pressure, etc.
A Corrosion Rate is a Speed! The Corrosion Rate is the speed of “Corrosion BUG” eating through the metal! The units commonly used to measure the speed of the corrosion bug are inches-per-year or mils-per-year. (A Corrosion Rate in metric measurements would be …
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