Definition(s)
Condition monitoring locations
Designated areas on pressure vessels where periodic external examinations are conducted in order to directly assess the condition of the vessel. CMLs may contain one or more examination points and utilize multiple inspection techniques that are based on the predicted damage mechanism to give the highest probability of detection. CMLs can be a single small area on a pressure vessel (e.g. a 2-in. diameter spot or plane through a section of a nozzle where recording points exist in all four quadrants of the plane).
- NOTE: CMLs now include but are not limited to what were previously called TMLs.
Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards
Condition monitoring locations (CMLs)
Designated areas on pressure vessels where periodic examinations are conducted. Previously, they were normally referred to as “thickness monitoring locations (TMLs)”.
Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards