REPAIRS & MAINTENANCE
ISO 17025 CALIBRATION
FLUE GAS ANALYZERS
STATIONARY SOURCE EMISSIONS
LOW OXYGEN INDEX
The AMS (Automated Measuring System) and related analyzers must comply with these EEC standards :
- EN 15267-3 : General standard for AMS Outstanding new project EN 15267-4 (P-AMS) available
- EN 12619 : TOC (FID analyzers)
- EN 14789 : O2 (paramagnetic analyzers) Outstanding new project available
- EN 14792 : NO/NOx (chemiluminescence analyzers) Outstanding new project available
- EN 15058 : CO (Non dispersive infrared analyzers) Outstanding new project available
- EN ISO 25140 : CH4 (FID analyzers)
- ISO 21258 : N2O (NDIR analyzers)
LOI (Limit Oxygen Index)
The limit oxygen index (LOI) is the minimum concentration of oxygen, expressed as a percentage, that will support combustion of a polymer or plastic material.
The test is implemented according to standard EN ISO 4589-2.
It is measured by passing a mixture of oxygen and nitrogen over a burning specimen, and reducing the oxygen level until a critical level of combustion is reached.
Testing laboratories Flue gas measurements in combustion plants
The LCP directive (Large Combustion Plants) 2001/80/EC aims to reduce emissions from plants whose rated thermal input is equal to or greater than 50MWth.
The MCP directive (Medium Combustion Plants) 2015/2193 regulates pollutants emissions from the combustion of fuels from plants with a rated thermal input equal to or greater than 1 MWth and less than 50 MWth.
The EEC standard EN 50379-2 specifies the required characteristics of the flue gas analyzers used during pre starting-up inspections.
EEC guidelines for good practises in IVF (in vitro fertilization) are described in a ESHRE document.
The embryos should be stored at 5% - 7%
vol. CO2 in pure air at
The preserved foods under MAP (Modified Atmosphere Packaging) should respect the good manufacturing and sanitary practices of HACCP (Hazard Analysis Critical Control Point).
3 gases are mostly used : carbon dioxide, nitrogen and oxygen.
A monogas or multigas mixture is used, depending on the physical and chemical characteristics of the preserved food.
Toxicity levels of chemicals in ambient air are defined by local regulations e.g. COSHH in UK (Control of Substances Hazardous to Health).
In industrial environments, the common toxic gases are CO, CO2, SO2, O3, NH3 and H2S.
In unventilated confined areas (e.g. tanks, liquid nitrogen discharge, wine vats) , the risk of anoxia (death from lack of oxygen) must be properly assessed.
Toxic gas and oxygen detectors provide the monitoring of a specified level of toxicity (SLOT) at the work place.
Flammable gases combined with ambient air create an explosion hazard e.g. DSEAR in UK (Dangerous Substances and Explosive Atmospheres Regulations).
In industrial environments, the common flammable gases are CH4 (LNG, biogas and other non-conventional sources) and H2 (UPS battery room, fuel gas store room).
Flammable gas detectors provide the monitoring of explosion hazards, under and up to the lower explosive limit (LEL).
The quality of medical air or oxygen ducted in hospital gas pipeline systems is continuously monitored by gas analyzers to ensure their compliance to applying regulations (monographs of the European Pharmacopoeia or other relevant local regulations).