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Part 5 of 6 - Implementation Phase - Safety Lifecycle Seminar - Emerson Exchange 2010
 

Part 5 of 6 - Implementation Phase - Safety Lifecycle Seminar - Emerson Exchange 2010

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    Part 5 of 6 - Implementation Phase - Safety Lifecycle Seminar - Emerson Exchange 2010 Part 5 of 6 - Implementation Phase - Safety Lifecycle Seminar - Emerson Exchange 2010 Presentation Transcript

    • Implementation Phase
    • Implementation Phase
    • Implementation Phase
    • Implementation Phase
    • Implementation Phase
    • Design and Engineering of theSafety Instrumented System
    • Design and Engineering of theSafety Instrumented System
      Iterate if requirements are not met.
    • Technology selection
      Sensors
      Analog vs. discrete signal
      Smart vs. conventional transmitter
      Certified vs. proven-in-use
    • SIS Application?
      Certified
      Prior-Use
      Mfg proves
      It’s safe
      PFD
      PFD
      User proves
      It’s safe
      PFD
      User proves
      It’s safe
    • Technology selection
      Logic solver
      Relays vs. PLC vs. Safety PLC
      HART I/O vs. conventional analog
      Centralized vs. modular
      Integrated vs. Standalone
    • Centralized Logic Solver
      • 100’s of SIF’s in one box.
      • Good for large projects.
      • Single point of failure.
      Modular Logic Solver
      • Isolates SIF’s
      • Scalable for large & small projects
      • Eliminates single point of failure.
    • Source: ARC Advisory Group
    • Technology selection
      Final element
      Solenoid vs. DVC
      Automated vs. manual diagnostics
      Response time considerations
    • SIL 2
      PFD
      Proof Test Interval (years)
    • Architecture selection
      • Hardware fault tolerance (HFT) impacts performance
      • Safety integrity
      • Availability
      • SIL capability
    • Valve
    • Valve 1
      Valve 2
      Valve
    • Valve 1
      Valve 2
      Valve 1
      Valve 2
      Valve
    • Proof test philosophy
      Proof test frequency
      5 yrs, 1 yr, 6 mos, 3 mos?
      Online vs. offline proof testing.
      Turnaround schedule?
      Total SIF proof test or proof test components on different intervals?
    • Reliability evaluation
      Confirm that performance meets specifications
      Safety integrity (PFD)
      Availability (MTTFs)
      Response time
    • λD= 0.02 failures/yr
      λS = 0.01 failures/yr
      T = 1 year
      1oo2
      2oo3
      1oo1
      2oo2
    • PFDSIF1 = PFDPT-101 +PFDlogicsolver+ PFDFV-101
      Logic solver
      SIF #1
      PT-101
      FV-101
    • Source: IEC 61511-1, Table 3 – Safety Integrity Levels: probability of failure on demand
    • Detailed design & build
      Instrument design / specifications
      Wiring drawings
      Hardware design & build
      Software design & implementation
      BPCS / SIS integration
      Factory acceptance testing
    • Factory Acceptance Testing (FAT)
    • Installation, Commissioning and Validation
    • Installation, commissioning, and Validation
      Validation is the key difference between control and safety systems.
    • ?