Optimizing Proof Test Interval: A Case of Study at Calumet Specialty
AIChE Spring Meeting and Global Congress on Process Safety
2021
2021 AIChE Virtual Spring Meeting and 17th Global Congress on Process Safety
Global Congress on Process Safety
Portuguese Session: Gestao da Seguranca de Processos baseada em Risco
Wednesday, April 21, 2021 - 3:10pm to 3:30pm
It does not matter how much effort is compromised towards calculating a safety instrumented system (SIS) performance if it is not validated, implemented, audited, assessed and maintained according to the assumptions made during the early phases of the SIS project. Yet operating companies face the day to day burden of keeping their costs while still keeping their personnel and assets safety.
This paper discuss the practical approach of proof testing such safety systems and considerations regarding proof test coverage compared to the actual site maintenance capability; useful life of devices pertaining to critical applications; and corresponding proof test procedures to address the parameters adopted in the SIL verification calculations.
Calumet Specialtyâs case study presents the opportunities observed while reviewing their safety instrumented functions, which resulted in a planned and gradual optimization in their periodic preventive maintenance.
Keywords
Proof test interval, Safety Instrumented System, Prior use, PSM & FSM