ASME RAM-2-2016 pdf free

ASME RAM-2-2016 pdf free.Reliability, Availability,and Maintainability Program Development Process for Existing Power Plants.
failure mechanism: the mode and cause of an equipment failure.
generalized time parameter: a parameter that measures the passage of time and aging of a component, and which may be used as the basis for scheduled maintenance. Number of operations, mileage, rotations, tons moved, and gallons flowed are examples of generalized time parameters.
Incipient failure: preexisting, emerging, and developing, though not evident, condition whereby equipment is nearly ready to fail; a hidden failure that is presumed to have existed prior to its becoming evident.
life limit: a limit that ensures the rework or replace task for an aging component or part is performed prior to the component or part reaching its end of life, See safe life limit. maintainability: the ability to access equipment, perform maintenance work, and return the equipment to operation. Access to parts, spare parts, and support tools; availability of trained, skilled personnel; ability to preplan work; and flexibilty of work rules all affect equipment maintainability. Maintainability supports the performance of on-condltion (condition-directed) maintenance on short notice.
master equipment list (MEL): an equipment registry listing all installed plant equipment.
partitioning: the process of conceptually separating a component into its constituent parts for further evaluation and to differentiate risk; the development of a hierarchy that identifies system, component, and part subassemblies contributing functions. Also called system or component breakdown into constituents.
prima,y component; the component of direct interest In a failure analysis; the failed component for which mitigation measures are developed. See secondary component.
primaiyfailure:a failure of a primary component; a failure within the analysis boundary.
RAM:(a) reliability, availability, and maintainability.(b) an ASME RAM program comprising a scheduled maintenance program with rounds and its complementary condition-based maintenance program response.
rounds: tasks performed at short intervals by operators to monitor areas and alarm conditions; these tasks may include routine alarm resets, equipment observations, and equipment realignments. Each round takes the operator on a path through a section of the plant to monitor local conditions.
routes: repetitive work performed on many different applications of the same component by a skilled technician or mechanic in the same way. Repetitive calibrations, for example, may be placed into one route.
safe life limit: a limit that ensures an aging safety.critical component or part provides uninterrupted service before reaching its end of life, or is replaced before reaching its minimum age limit. A safe life limit virtually guarantees Items with direct safety risk never age out before a rework or replace task,
scheduled maintenance: planned maintenance tasks, including condition assessments, scheduled based upon a generalized time parameter. Equipment asset manage. ment scheduling systems (EAMS) primarily generate scheduled maintenance work orders; operator rounds software installed on personal digital assistants (Pl)As) controls rounds. Operator distributed control system (DCS) screen sampling points on visual control screen displays are equivalent to EAMS work orders for operators.
secondary component a component outside the boundary of the primary component; a separate component from the primary component of consideration,
secondary failure: failure of a secondary component; a failure outside the primary component’s boundary, caused by a primary component failure. A secondary failure is external to the primary component, caused by the primary component, and therefore uncontrollable within the secondary component’s boundary. Examples include secondary failures caused by fires, load falls from hoists or cranes, and missiles created from disintegrating rotating parts. No amount of scheduled maintenance on a primary component can eliminate the effects of external secondary component failures. Secondary failure can be avoided only by controlling failure at the original primary component itself, where the failure is a primary failure. See primary failure.ASME RAM-2 pdf free download.