Draft BS EN ISO 10418 Petroleum and natural gas industries - Offshore
production installations – Process safety systems
2003 edition:
 detailed API RP 14C guidance
 2 levels of protection; independent control & shutdown
 structure built around the API RP 14C
 text setting out the outlines of alternative approach to API RP 14C
 didn’t correspond to how we design process safety systems in the North Sea.
Draft new edition:
 no API RP 14C text
 2 levels of protection; independent control & shutdown
 retains the existing structure
 retains guidance on F&G
 retains guidance on toxic gas
 retains guidance on ESS
 retains old API RP 14C abbreviations
 retains existing outlines of an alternative approach
 guidance on ESD taken out!
 doesn’t correspond to how we design process safety systems in the North Sea
 no detailed guidance on the required techniques
 no detailed guidance on PSD & ESD functions.
API RP14C now a legal requirement in USA – part of CFR
What do we want in new edition?
 standard should address all aspects of designing safeguarding measures for offshore
process systems
 guidance on means of developing design:
 P&IDs
 cause and effects
 hazops
 ESD/PSD cause and effects reviews
 LOPA & SIL assessment
 inherently safer design
 HP/LP interface studies
 alarm & trip register
 philosophies: ESD, process control & shutdown, segregation, relief & blowdown,
flare & vent
 performance standards
 guidance on:
 ESD & PSD functions & hierarchy
 relief & blowdown and high integrity trips
 electrical shutdown
 inhibits
 role of pre-alarms & trips
 ISO 10418 standard to cover protective loop, not just sensors – better link with IEC 61511
 state generic response required when process variable (pressure, flow, level) limits exceeded