AB-513, Repair Alteration Requirements - ABSA
AB-513, Repair Alteration Requirements - ABSA
AB-513, Repair Alteration Requirements - ABSA
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the pressure equipment safety authority<br />
8.0 EQUIPMENT ASSESSMENT, WORK SCOPE AND REPAIR AND<br />
ALTERATION PROCEDURES (STRATEGIES)<br />
The owner must ensure that competent persons are assigned to assess the<br />
equipment, prepare and approve the work scope and repair or alteration procedures,<br />
and provide appropriate oversight over the repair or alteration. This includes, as<br />
applicable, persons who have the required competence in: design, process<br />
considerations, corrosion, the code of construction, welding, inspection, NDE and the<br />
relevant good engineering practices.<br />
8.1 Root Cause that Prompted the Work<br />
The owner must ensure that the root cause that prompted the repair or alteration is<br />
determined and then take suitable action to prevent similar causes that can affect the<br />
integrity of the pressure equipment. This may require that the operational and<br />
maintenance history of the item is reviewed, other equipment in the system is<br />
inspected and that the inspection plans, process and mechanical design, and<br />
operational and maintenance work processes are revised accordingly.<br />
8.2 Condition of the Item to be Altered or <strong>Repair</strong>ed<br />
To assure the item will be safe for operation, the condition of all components of the<br />
item to be repaired or altered must be known before the work scope is established.<br />
An in-service inspection, non-destructive examinations or other tests, suitable to<br />
identify the potential damage mechanisms, may then need to be done in order to<br />
verify the extent of the defect and to verify the condition of the item that is to be<br />
repaired or altered. <strong>AB</strong>-506 covers requirements for conducting in-service<br />
inspections.<br />
8.3 Fitness-for-Purpose Evaluations<br />
API 579 covers fitness-for-service assessment methods and procedures for<br />
evaluating commonly encountered flaws, including general and widespread corrosion<br />
and pitting, blisters, crack-like flaws, and fire damage. Each API 579 assessment of<br />
the flaws in a boiler or pressure vessel shall be submitted to an <strong>AB</strong>SA SCO for<br />
acceptance, whenever the minimum design conditions of the original code of<br />
construction are not met and it is intended that the item will be placed in service<br />
without repairing it based on the results of the API 579 assessment.<br />
The criteria for accepting pits and local thin areas in accordance with API 510 and<br />
NBIC may generally be accepted without submission to <strong>AB</strong>SA.<br />
Note: API 577, Article 3.4, provides detailed information on flaw excavation.<br />
Issued 2012-12-13 <strong>AB</strong>-<strong>513</strong> Edition 2, Rev 1 Page 13 of 26