Process Safety Services

Once the Safety Requirements Specification has been produced, the next step is the design of the ProSafe Safety Instrumented System (SIS).

Hazards and Risk Assessment is the first step in the IEC 61511 Safety Lifecycle model. This is a critical activity as it identifies all potential hazards and operation issues in the current design, which may require further risk reduction.

Functional Safety Assessments are mandatory to be carried out at 5 stages as per IEC 61511. Similarly, Functional Safety Audits are required to be carried out on plants’ FSM systems on a typically yearly basis.

Yokogawa's plant-wide safety monitoring solution provides analysis and reporting, helping customers monitor the performance effectiveness of defined SIS (Safety Instrumented Systems) against their design targets.

The challenges faced by facilities include accurately budgeting for process safety equipment and allowing for the protection of people and plant, while complying with government regulations. Following on from the Hazard and Risk Assessment, the identified SIFs are assigned a target measure of their reliability to perform the safety function in order to bring the risk to a tolerable level.

Our Functional Safety Experts ensure that critical safety information from previous activities are correctly specified in the Safety Requirement Specifications. This step is equally important as it ensures that the SIS design can be carried out to correct specifications, taking into account all aspects of process safety relevant to the  hazards being protected against.

SIL selection ensures legislative safety requirements are met prior to final plant design — avoiding costly redesign and rework of the process safety system — by determining the intended SIS design meets all safety targets specified in the SIL selection workshops.

Yokogawa provides process safety services that align with the AS IEC 61511 Safety Lifecycle.