Page 181 - Offshore Electrical Engineering Manual

168 CHAPTER 15 Process Control and Monitoring Systems

‘functional safety of electrical/electronic/programmable electronic safety-related
systems’, which is the generic standard, and IEC 61511, ‘functional safety - safety
instrumented systems for the process industry sector’, which is the derivative standard
specifically written for process plants. These standards follow the same philosophy as
the Offshore SCR mentioned earlier in that they are goal setting, requiring implementa-
tion during the whole life cycle of the plant and are based on continuous risk assess-
ment to ensure that an adequate safety integrity level of protection is provided.
Some requirements of the standard relate to developmental activities where the
implementation technology may not yet have been fully decided. This includes
development of the overall safety requirements (concept, scope definition, hazard
analysis and risk assessment). If there is a possibility that electrical and/or electronic
and/or programmable electronic (E/E/PE) technologies might be used, the standard
should be applied so that the functional safety requirements for any E/E/PE safety-
related systems are determined in a methodical, risk-based manner.
Other requirements of the standard are not solely specific to E/E/PE technology,
including documentation, management of functional safety, functional safety assess-
ment and competence. In order to comply with the full intent of the standard, the
hazard analysis and risk assessment must be continually reviewed and revalidated
during the full life cycle of the system.

FIRE AND GAS CONSIDERATIONS
The Health and Safety Executive (HSE) published the third edition of prevention
of fire and explosion, and emergency response (PFEER) L65 entitled ‘Offshore
Installations (Prevention of Fire and Explosion, and Emergency Response)
Regulations 1995 - Approved Code of Practice and Guidance’ in 2016. In which
page 2 has the following definitions:

Approved Code of Practice
This Code has been approved by the Health and Safety Executive, with the consent
of the Secretary of State. It gives practical advice on how to comply with the law. If
you follow the advice you will be doing enough to comply with the law in respect
of those specific matters on which the Code gives advice. You may use alternative
methods to those set out in the Code in order to comply with the law.
However, the Code has a special legal status. If you are prosecuted for breach of
health and safety law, and it is proved that you did not follow the relevant provi-
sions of the Code, you will need to show that you have complied with the law in
some other way or a Court will find you at fault.
Guidance
This guidance is issued by the Health and Safety Executive. Following the guid-
ance is not compulsory, unless specifically stated, and you are free to take other