Beimco BV
Electrical and Automation

Functional Safety Management Systems

HAZOP/SIL Study

Functional safety based on IEC 61508 and IEC 61511 is a method to freedom from unacceptable risk of physical injury or of damage to the health of people either directly or indirectly (through damage to property or to the environment) by the proper implementation of one or more automatic protection functions (often called safety functions). This process includes:

·        Identifying what the required safety functions are. This means the hazards and safety functions should be known. A process of function reviews, formal HAZIDs, HAZOPs and accident reviews are applied to identify these

·        Assessment of the risk-reduction required by the safety function. This will involve a safety integrity level (SIL) or performance level or other quantification assessment based on different methods including Risk graph or layer of Protection Analysis (LOPA).

·        The Safety Requirement Specification (SRS) contains the functional and integrity requirements for each Safety Instrumented Function (SIF). The SRS is the main reference document in which the design, installation, validation and operation of the system must follow. To be fully effective the SRS must be clear, concise, complete and consistent.

Failure Modes and Effects Analysis (FMEA)

Failure Modes and Effects Analysis (FMEA) is methodology for analysing potential reliability problems early in the development cycle where it is easier to take actions to overcome these issues, thereby enhancing reliability through design. FMEA is used to identify potential failure modes, determine their effect on the operation of the product, and identify actions to mitigate the failures. A crucial step is anticipating what might go wrong with a product. While anticipating every failure mode is not possible, the development team should formulate as extensive a list of potential failure modes as possible.

Alarm Management

Alarm systems form an essential part of the operator interfaces to large modern industrial facilities. They provide vital support to the operators by warning them of situations that need their attention and have an important role in preventing, controlling and mitigating the effects of abnormal situations. The alarm management system is a document which specifies alarm philosophy, identification, rationalization, implementation, operation, maintenance and management of change.

·        Alarm identifying on P&ID or other documents like HAZOP report which is a general term for the can be used to determine the possible need for an alarm or a change to an alarm. The identification stage is the input point of the alarm lifecycle for recommended alarms or alarm changes. Identified alarms are an input to rationalization.

·        Alarm rationalization based on the severity of the consequences. Unnecessary alarms greatly reduce the effectiveness of operators and compromise their ability to address critical alarms, which can be extremely costly and potentially lead to regulatory compliance breaches.

·        To provide the alarm response, setpoints and management documents which specify required actions by operation when the alarm is popped up due to the severity and consequences. As well how to maintain, management of change and audit the generated alarm for process optimization