sil presentation

SIL Suitable Final Elements

FUNCTIONAL SAFETY OF

FIRE & GAS SYSTEMS

SA FIRE PROTECTION

FUNCTIONAL SAFETY

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

28/02/2015 2SIL Suitable Final Elements

DEFINITION OF FUNCTIONAL SAFETY

Safety is the absence of an unacceptable risk of physical injury to people or damage to the properties

Functional Safety is part of the overall safety which depends on the correct functioning of a safety-related system

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


SAFETY INSTRUMENTED SYSTEM (SIS)

A Safety Instrumented System (SIS) orSafety-related System is an appropriate system required to reduce the risk (shown by a hazard analysis) of the Equipment Under Control (EUC)

A SIS performs one or more Safety Functions to reduce the risk

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


REQUIREMENTS TO FUNCTIONAL SAFETY

Two types of requirements are necessary to achieve Functional Safety:

Safety Function Requirements: the scope of the Safety Function, derivedfrom the hazard analysis

Safety Integrity Requirements: the probability that the Safety Function willbe performed satisfactorily, derivedfrom the risk assessment

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


THE STANDARD IEC 61508

IEC 61508 “Functional Safety of electrical/electronic / programmable electronic (E/E/PE) safety-related systems”:

Covers all the safety lifecycle activities

Contains requirements for preventingfailures and controlling failures, ensuring safety even when faults are present

Specifies the techniques and measuresto achieve the required Safety Integrity

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


SAFETY INTEGRITY LEVEL (SIL)

Safety Integrity is the probability thatthe SIS will perform the required SafetyFunctions satisfactorily

IEC 61508 specifies 4 levels of safetyperformance for a Safety Function, called Safety Integrity Level (SIL)

The Standard details the requirementsnecessary to achieve each SafetyIntegrity Level. SIL1 is the lowest leveland SIL4 is the highest

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


SAFETY INTEGRITY LEVEL (SIL)

FUNCTIONAL SAFETY

• Definition

• SIS

• Requirements

• IEC 61508

• SIL

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


Low demand mode of operation: frequency of demands for the SIS not greater than once per year, and not greater than twice the proof-test frequency

Safety Integrity Level (SIL)Average Probability of Failure

on Demand (PFDavg)

4 ≥ 10-5 to < 10-4

3 ≥ 10-4 to < 10-3

2 ≥ 10-3 to < 10-2

1 ≥ 10-2 to < 10-1

FIRE & GAS SYSTEM

FUNCTIONAL SAFETY

F&G SYSTEM

• Objectives

• Effectiveness

• Components

• Final Elements

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


TASKS OF F&G SYSTEM

The main tasks of a F&G system are:

Detect any hazardous fire or gas condition

Alert the personnel in the monitored area

Activate the control and mitigation systems

FUNCTIONAL SAFETY

F&G SYSTEM

• Tasks

• Effectiveness

• Components

• Final Elements

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


F&G SYSTEM EFFECTIVENESS

The F&G system Effectiveness is the product of three factors:

Detection Coverage: the fraction of the monitored area in which an eventualhazard would be detected

Mitigation Effectiveness: the probability that the activation of the Final Elements would reduce the consequence of a defined hazard

F&G Safety Availability (SA): 1-PFDavg

FUNCTIONAL SAFETY

F&G SYSTEM

• Tasks

• Effectiveness

• Components

• Final Elements

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


A F&G system consists of:

Detectors

Logic Solver

Final Elements

A chain is only as strong as its weakestelement

COMPONENTS OF F&G SYSTEM

FUNCTIONAL SAFETY

F&G SYSTEM

• Tasks

• Effectiveness

• Components

• Final Elements

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


LOGIC

SOLVER

FINAL

ELEMENTSDETECTORS

The F&G Effectiveness is related to the Safety Availability of all its components

SA has developed

SIL suitable Final Elements

for the main fire-fighting systems

FINAL ELEMENTS

FUNCTIONAL SAFETY

F&G SYSTEM

• Tasks

• Effectiveness

• Components

• Final Elements

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE


LOGIC

SOLVER

FINAL

ELEMENTSDETECTORS

NIAGARA

ELECTRIC

MONITORS

ELECTRIC

ACTUATORS

VDD DELUGE

VALVES

ELECTRIC MONITOR

NIAGARA SERIES

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

• Description

• Main features

• Advantages

• Application

ELECTRIC ACTUATOR

VDD DELUGE VALVE


DESCRIPTION

The fire-fighting monitors Niagara series are electric type remote controlled water cannons, intended to deliver large amount of water towards remote targets.

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

• Description

• Main features

• Advantages

• Application

ELECTRIC ACTUATOR

VDD DELUGE VALVE


The monitor architecture comprises of a Logic Controller and one or more monitor assemblies

MAIN FEATURES

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

• Description

• Main features

• Advantages

• Application

ELECTRIC ACTUATOR

VDD DELUGE VALVE


Automatic self-diagnostic analysis

Remote controlled

Designed for sea water andwater foam solution

Suitability for SIL2 systems validated by Bureau Veritas

ADVANTAGES

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

• Description

• Main features

• Advantages

• Application

ELECTRIC ACTUATOR

VDD DELUGE VALVE


Automatic self-diagnostic analysis: at regular intervals the self-diagnostic system in the Logic Controller checks the correct operation on given commands

Constant monitoring of any possible failure of monitor and nozzle

Reduction of the probability that faults, taking place between regular maintenance, will pass undetected

Increased reliability on demand

APPLICATION

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

• Description

• Main features

• Advantages

• Application

ELECTRIC ACTUATOR

VDD DELUGE VALVE


Designed for petrochemical jetty and marine harbor and structure cooling

Recommended for those systems which require:

A low probability of failure on demand

A fire protection system with a high Safety Integrity Level

A large amount of water towards remote targets

DOUBLE COIL

ELECTRIC ACTUATOR

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

• Description

• Main features

• Application

VDD DELUGE VALVE


DESCRIPTION

The double coil electric actuator has been developed to sharply reducing the probability of failure of a pilot cylinder of a gaseous based fire protection system (carbon dioxide, inert gases, halocarbons) or a water mist system


FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

• Description

• Main features

• Application

VDD DELUGE VALVE

28/02/2015 20

MAIN FEATURES

Redundancy: the actuator has two coils which receive two independent signals from the Logic Solver. If one coil should fail, the other coil is able to open the cylinder valve

Suitability for SIL2systems validated by Bureau Veritas


FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

• Description

• Main features

• Application

VDD DELUGE VALVE

28/02/2015 21

APPLICATION

Designed for the protection of gas turbines and their generators, electronic rooms and general installations on FPSO





FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

• Description

• Main features

• Application

VDD DELUGE VALVE

28/02/2015 22

DOUBLE CHAMBER DELUGE VALVE

MODEL VDD

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description

• Principle of operation

• Main features

• Advantages

• Application


DESCRIPTION

The VDD deluge valve combines all the functions of a traditional deluge valve with a fully redundant architecture, designed to achieve a higher Safety Availability

The VDD deluge valve has two priming chambers, each oneprovided with its own diaphragm and trim

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


PRINCIPLE OF OPERATION

In the set position (valve closed)The pressure of the water trapped in the priming chambers holds the diaphragms on the valve seats, keeping the valve closed

In fire condition (valve open)The pressure is released from the priming chambers. The water supply pressure forces the diaphragm off the seats, opening the valve

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


MAIN FEATURES

Fully redundant system

Built-in emergency bypass line that operates on both priming chambers in “hot back-up”

Continuous fire protection

Designed to overcome a double failure

Suitability for SIL3 systems validated by Bureau Veritas

Under UL testing for UL/cUL Listing

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


ADVANTAGES

Built-in emergency bypass line

Each priming chamber provides the nominal design waterway for the fire protection system

The system is fully redundant

The time to respond to a failure is reduced to zero

No need of an external bypass line on the skid: reduction of dimensions, weight and cost of the skid

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


ADVANTAGES


A hydraulic bridge between the trims allows each trim to control both the diaphragms

In case of failure of one trim, the other trim can open both the priming chambers

The VDD deluge valve can overcome a double failure

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


ADVANTAGES

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application



Fault Tree of the VDD deluge valve

ADVANTAGES

Fire protection system always in service

Two built-in isolationvalves allow alternate in-line maintenance to be performed

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


An interlock system prevents the accidental or incorrect rotation of the isolation valves

APPLICATION

Made of Ni-Al-Bronze, a highly resistant material

Specifically designed for harsh environments, such as oil & gas onshore and offshore and chemical and nuclear plants installations

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


Sea water, foam concentrate and water foam solution

APPLICATION




Continuity of fire protection during maintenance or repair

Reduction of weight, dimension and cost of the skid

FUNCTIONAL SAFETY

F&G SYSTEM

NIAGARA MONITOR

ELECTRIC ACTUATOR

VDD DELUGE VALVE

• Description


• Main features

• Advantages

• Application


REFERENCE CONTACT

SA Fire Protection

Viale Europa 121-123

Cascina ( PISA ) – Italy

Ph. +39.050.70.30.06

Fax. +39.050.70.35.80

[email protected]

sil presentation

Engineering

propertiesfunctional

overall safety

safety function requirements

levels of safety performance

lowest level

requirements necessary

appropriate system

presentazione standard