hazardous gas monitoring - the c&s companies · 2016. 9. 1. · combustible gas detectors •...
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Hazardous Gas Monitoring Presented by: Kevin Geidel – CFPS, CET
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Objectives • What is HGMS? • Design Standards • System Components • Engineering Evaluation • Continual Operation
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HGMS • Continuous program of observation,
measurement and judgment. • Area Monitoring – measures exposure
of the ambient air concentration of a particular substance in a given area at a given time
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Purpose • Fire Safety
– Flammable Concentration – Fuel Load
• Life Safety – Contaminated Breathing Air
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Toxicity vs. Flammability • Capacity of a material to produce injury or
harm when the chemical has reached sufficient concentration at a certain site in the body.
• Capacity of a material to burn, regardless of source or chemical composition, when dispersed as a gas in ambient air.
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Design Standards • National Fire Protection Association • Instrument Society of America • American National Standards Institute • FCNYS - Chapter 35
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Instrument Society of America • ANSI/ISA S12.13 – Performance Requirement,
Combustible Gas Detectors • ISA RP12.13, PR II-87 – Recommended Practice:
Installation, Operation, and Maintenance of Combustible Gas Detection Instruments
• ANSI/ISA S12.15, PT I-90 – Performance Requirements for Hydrogen Sulfide Detection Instruments (10-100 ppm)
• ISA RP12.15, PT II-90 – Recommended Practice: Installation, Operation and Maintenance of Hydrogen Sulfide Detection Instruments
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National Fire Protection Association • NFPA 30 – Flammable and Combustible Liquids
Code • NFPA 70 – National Electric Code • NFPA 72 – National Fire Alarm and Signaling Code • NFPA 86 – Standard for Ovens and Furnaces • NFPA 720 – Standard for the Installation of Carbon
Monoxide (CO) Warning Equipment in Dwelling Units
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NFPA 70 – NEC • National Electric Code – Article 500
– Class 1 Division 1 – Class 1 Division 2
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Types of Systems • Portable • Fixed • Personal • Area
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Portable Detection
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Fixed Detection
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Personal Detection
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Area Detection
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System Components • Sensors • Transmitters • Communication • Display Units • Notification Appliances • Exhaust Monitoring
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Sensors • Semiconductor (MOS) • Electrochemical • Flame Cell • Flame Ionization • Nondipersive Infared (NDIR) • Oxygen Detectors
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Other Components • Transmitters • Communication Protocol • Display Units • Notification Appliances • Exhaust Monitoring
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Design Requirements • ANSI/ISA S12.13 vs NFPA 72
– Supervision – Automatic Response – Sensor Placement – Engineering Evaluation
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Engineering Evaluation • Ambient Conditions Analysis • Compartment Analysis • Process Analysis • Chemical Analysis • Life Safety Analysis
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Continual Operation • Preventive Maintenance • Process Improvement • System Calibration • Component Testing
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Ammonia Room
Solvent Room
BUTLITH Room
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Learning Assessment • What is HGMS? • Who drives the design standards? • Define a Class 1 hazard. • What is the purpose of an ambient air
analysis?
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Hazardous Gas Monitoring Presented by: Kevin Geidel – CFPS, CET
Fire Protection Engineer Life Safety Services Department
C&S Engineers, Inc. [email protected]