Requirements forRequirements for Electronic Safety Equipment
Transcript of Requirements forRequirements for Electronic Safety Equipment
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Requirements forRequirements for Electronic Safety Equipment used in aEquipment used in a Hazardous Location
By Jim Marquedant
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Agenda
FM Global & FM Approvals Overview
Ignition In Hazardous Locations
Evolution of Intrinsic Safety
Recommendations for Electronic Safety Equipment (ESE)
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Parent company of FM Approvals Largest industrial and commercial propertyLargest industrial and commercial property
insurance company in the world What makes FM Global unique? What makes FM Global unique?
– Philosophy – Majority of loss is preventable– Single Focus – Highly Protected Risk (HPR)– Research & Engineeringg g
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Supporting Property Loss PreventionSupporting Property Loss Prevention
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Mission StatementMission StatementFM Approvals approves and certifies products pp pp pand services with unique focus on:
Objectively testing property loss preventionproducts and services and certifying those that meet rigorous loss prevention standards;
Encouraging the development and use of Approved products and services that improve and
d t l ti tiadvance property loss prevention practices.
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Hi tHistory
1897 1940s 1999 2006
1897 - Approved Electrical Fittings published by Inspection Department of the Associated Factory Mutual Fire Insurance CompaniesFactory Mutual Fire Insurance Companies. Dated June 1897.
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We offer Product Certification in 3 key areas Fire Protection Equipment
S i kl
We offer Product Certification in 3 key areas
−Sprinklers−Traditional fire protection equipment−Fire pumps and related equipmentFire pumps and related equipment−Special-protection extinguishing systems
Electrical Equipment q p−Equipment for hazardous locations−Fire alarm and signaling systems
Building Materials−Roofing products
Fi t ti d fi t d b ildi t i l−Fire-protective and fire-rated building materials−Other property loss prevention products
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H d L ti C tifi tiHazardous Location Certification There are many types of protection that can There are many types of protection that can
make a product suitable for use in a specific area classification:area classification: – Explosionproof
Fl f– Nonincendive
N ki– Flameproof– Restricted Breathing
E l ti
– Non-sparking– Protected Sparking
I t i i S f t– Encapsulation– Pressurization/Purging
– Intrinsic Safety– & More
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E l f IS P d tExamples of IS Products We Approve hundreds of products as IS: We Approve hundreds of products as IS:
Land Mobile Radios Barriers– Land Mobile Radios– Telephones
Cameras
– Barriers– I/O Modules
T t S– Cameras– Computers
G D t t
– Temperature Sensors– Pressure Sensors
L l S– Gas Detectors– Flashlights
L
– Level Sensors– Flow Meters
Et– Lamps – Etc……
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Ignition In Hazardous Locations
H d l ti t d d f th Hazardous location standards focus on the prevention of an ignition by eliminating one or more of the three elementsmore of the three elements
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Methods to eliminate an element:
Oxidizer = Purging with Inert Gas Fuel = Encapsulation Fuel = Encapsulation Ignition = Intrinsic Safety
There are many others
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Intrinsic SafetyIntrinsic Safety Focuses On The Ignition Source
I iti E CIgnition Energy Curve
Ignition Point
Intrinsic Safety = Margin of Safety
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FM 3610 Revisions and Margin of SafetyFM 3610 Revisions and Margin of SafetyIgnition Point 2012 Design Freeze
tion
Margin of Safety
LMRMargin of Safety No Design Freeze
Ris
k of
Igni Margin of Safety
Other ESEMargin of Safety
R
LCD Display LiO Battery ?
1988Safety Factor = 1.22O / Sh t
LCD DisplaySMT Circuits
1999Safety Factor = 1.5Defined Faults
LiO BatteryActive Circuits
2010Prescriptive AssessmentsAdditi l B tt A t
?
?
Open / Shorts Defined Faults Additional Battery Assessments
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FM Approvals’ Recommendations
1. Require the same margin of safety for all ESE used in the same area.
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FM 3610 Revisions and Margin of SafetyFM 3610 Revisions and Margin of SafetyIgnition Point 2012 Design Freeze
tion
Margin of Safety
LMRMargin of Safety
No Design Freeze
Ris
k of
Igni Margin of Safety
Other ESEMargin of Safety
R
LCD Display LiO Battery ?
1988Safety Factor = 1.22O / Sh t
LCD DisplaySMT Circuits
1999Safety Factor = 1.5D fi d F lt
LiO BatteryActive Circuits
2010Prescriptive AssessmentsAdditi l B tt A t
?
?
Open / Shorts Defined Faults Additional Battery Assessments
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FM Approvals’ Recommendations
1. Require the same margin of safety for all ESE used in the same area.
2. Require suitability for a specific area q y pclassification rather than a specific protection method.
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Methods to eliminate an element:
Oxidizer = Purging with Inert Gas Fuel = Encapsulation Fuel = Encapsulation Ignition = Intrinsic Safety
There are many others
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