TAI provided API inspection and test services along with process engineering support to perform pressure relief scenario evaluations, tank and pressure vessel pressure rating calculations and related pressure relief device and header sizing. The calculations and documentation are required for compliance with OSHA’s Process Safety Management standard at the Chestertown and Franklin plants. The calculations required for the identified pressure relief scenarios have all been prepared using the SuperChems software where TAI is fully trained and fluid with the use of this highly respected industry standard software. In addition, TAI has internal calculation methods to utilize depending on the equipment and complexity of the needed calculations.

Work included the acquisition of available equipment data, field surveys, inspection and thickness testing, tank, pressure vessel and piping sketches and isometrics, all required calculations and documentation packages in compliance with Eastman corporate standards. TAI provided all services to establish the background information and prepare documentation required to validate the overpressure relief installations in accordance with applicable standards. TAI reviewed existing documentation for devices, as well as their representation on P&IDs.

TAI provided UT Thickness surveying, which included external visual inspection on all surfaces, recommendations and corrective actions, ultrasonic thickness measurements, and preparation of drawings. The equipment pressure ratings were calculated following RAGAGEP standards. Overpressure scenarios were evaluated and field investigations were conducted for each of the devices. The configurations and physical arrangements were documented. System analysis was then performed to determine the worst credible case scenario (WCCS), which was used as the design basis. All other considered and analyzed scenarios were documented. The WCCS was used to analyze the suitability of the current relief device in accordance with applicable codes and standards. Inlet and Outlet piping were also analyzed to assure pressure drops fell within requirements defined in the codes and standards.