Wednesday, October 26, 2022

Major Causes of Industrial Fires and Tips for Prevention

 Flame Detector

Industrial fires occur in every industry, resulting in massive financial losses and worker injuries or fatalities. In fact, more than 600 of these fires happen each year, according to the National Fire Protection Association. To prevent industrial fires, it’s essential to understand the major causes that spark them. Learning about the major causes of industrial fires and how to prevent them from happening on your own site will help you make informed decisions and keep your employees safe.

Combustible Dust:

Combustible dust is one of the major reasons for fires and explosions within an industrial setting. OSHA defines it as a solid dust particle material that poses a fire and explosion hazard. When it comes in contact with oxygen and an ignition source, the dust can result in a fire and explosion. In addition, if the dust is dispersed in an enclosed area, the risk of an outbreak is high and difficult to contain. Broken bag detectors can help prevent fire and dust flare-ups from happening.

Flammable Atmosphere:

One way that fire is ignited in an industry setting is through the ignition of an explosive atmosphere. The primary cause of this fire is the presence or release of flammable gas or vapour, which can be quickly ignited by a spark, open flame, overheated metal, electric arc, or other means.  

The most common combustible gases found in industries are natural gas (methane), propane gas (LPG), gasoline vapours, and other hydrocarbons. When determining potential sources of ignition, three factors need to be considered: the location of the flammable gas, its concentration, and whether or not it will mix with air before it reacts. The best prevention measure for this type of fire is limiting exposure to sources of ignition by providing ventilation for reducing atmospheric concentrations and investing in a flame detector.

Hot Work:

Hot work like welding, torch cutting, heating and soldering, burning, and brazing can all create the potential for fire and explosion. Fire risk is high in hot work environments due to the sparks that hot work equipment creates and molten material that can reach above 1,000F and travel more than 30ft. When the spark and heat from hot work combine with combustible dust, it results in fires and explosions.

Tips for Preventing Industrial Fires and Explosions:

·         Conduct a hazard analysis and invest in suitable fire detectors.

·         Have a fire suppression system in place.

·         Remove any combustible materials from the area.

·         Keep water supplies nearby and any other firefighting equipment that might be needed.

·         Keep an eye on electrical components, gas lines, and fuel tanks to ensure no ignition or leakage potential.

·         Be sure all employees are aware of evacuation routes in case a fire or explosion occurs. Offer training sessions about what to do in case of emergencies and when a flame detection system alarms.

·         Make sure you always have extra resources on hand, such as safety goggles, extinguishers, and protective suits if necessary.

·         Inspect and maintain your equipment and facility.

These steps are essential measures you need to take to prevent fire accidents in your facility and meet the standards of OSHA.

Sunday, October 2, 2022

The new age in Flame Detection

Flame Detector

In a hazardous environment like a petrochemical processing plant or an oil and gas facility, failing to detect gas leaks can result in catastrophic events. That’s why industries involved in processing, storing, manufacturing, and transporting flammable materials rely on fire monitoring systems to prevent workplace fire accidents.

Principles of Flame Detection – How do they work?

Fires radiate over the entire spectrum

  •           Ultraviolet, Visible and Infra-Red

High Intensity especially in IR (40kW for standard fire [0.1 m2 n-heptane])

Low frequency radiation flicker, typically 1-10 Hz.

Environmental constraints & false alarm sources help us select one technology over another……

Optical Flame Detector Technologies

Optical flame detectors provide the fastest detection of a flammable liquid or gaseous

fire in the early ignition stage. Today’s optical flame detectors are offered in a variety of dependable, flame sensing technologies as described below.

Ultraviolet (UV) flame detectors provide dependable, ultra-highspeed detection to virtually all fires. In general, they operate by counting the electron discharge from each UV photon. Their sensitivity to radiation from welding, lightning, X-rays, and other nuclear sources may limit them. They can also be adversely affected by airborne contaminants.

Multi-Spectrum Infrared flame detectors have the ideal combination of flame

sensitivity and false alarm rejection. Most MultiSpectrum Infrared (MIR) optical flame

detectors utilize three sensors at three different infrared wavelengths. Some MIR

detectors have sophisticated software algorithms which provide the ability to ignore

modulated black bodies and other non-fire sources in its field of view yet still retain its alarm capabilities.

Intelligent visual flame detection (iVFD) principle ensures maximum false alarm immunity and eliminates sensitivity loss in the presence of modulated sunlight and black body heat.

The detector operates ‘standalone’ or can be integrated with an FM Approved control system. Detectors are typically located throughout the installation to achieve specific detection coverage and ensure that site performance requirements are met. Each detector can provide live video images and fire alarm/fault signalling to the control equipment. Each detector incorporates within a single unit an imaging device, digital signal processing hardware, and firmware algorithms to process live video images and recognise flame features

 An Intelligent visual flame detection (iVFD) is

  •        A flame detector designed to detect small fires.
  •          A flame detector designed to detect large fires.
  •          A flame detector designed to detect fires when sunny.
  •         A flame detector designed to detect fires when it is raining.

Intelligent visual flame detectors (iVFD) consistently demonstrate the highest immunity to false alarms in areas where flare reflections and / or hot CO2 emissions may cause other technologies to false alarm.

Gas Detectors – Tips for Maintaining Your Equipment

When was the last time you calibrated the gas detectors in your facility? Probably you don't remember or haven't thought much about ...