Determinación del proceso de mantenimiento overhaul para calderas pirotubulares hasta 350 BHP

Abstract

In this titling project, the development of a completely practical overhaul maintenance procedure applied to fire-tube boilers from 5 to 350 BHP is presented, as well as presenting a viable alternative for the complete restoration of this equipment. This project is based on ASME, ASTM, API and UNE standards in which the processes and materials for the manufacture of boilers, component evaluation processes and boiler water quality are found. Therefore, the main components of a boiler were identified in addition to the essential requirements of the clients when requesting an overhaul maintenance of a fire-tube boiler. An evaluation model of the main components of a boiler was designed through the application of an API criticality evaluation process, which allowed to identify the critical components of the same and with them to elaborate an overhaul maintenance process. An overhaul maintenance flowchart was developed with the critical components of a boiler with which it is sought to change components that have failed or are about to do so under the standards allowed by ASME and leaving the equipment in "0 hours" operating conditions, increasing the lifetime of the same and reducing the necessary capital compared to the purchase of a new boiler with similar characteristics. With this background, it was seen the need to determine a technical procedure for overhaul maintenance with the help of flowcharts, checklists and Gantt charts so that operators or maintenance managers of any company can optimize their maintenance processes.