Classification of explosive and fire-hazardous premises

As a professional explosion-proof equipment & luminaires manufacturer YIBAI LED LIGHTING, below we just talk about some basic knowledge about the classification of explosive and fire hazardous premises.

The main precautionary measure for the prevention of fires and explosions from electrical equipment is the proper selection and operation of equipment in explosive and fire-hazardous areas. According to PUE, the premises are divided into explosives (B-I, B-Ia, B-Ib, B-Ig, B-P, B-Pa) and fire-hazardous (B-I, P-P, P-Pa, P- W) zones.

The explosive zone is a space in which explosive mixtures are or may be present

The fire zone is a space where combustible substances can be present during the normal technological processes and in case of possible violations thereof.

Class B-I – Areas of premises in which flammable gases and vapors are emitted in such quantity and with such properties that they can create explosive mixtures with air or other oxidants under normal short operating modes.

Class B-Ia – Areas of premises in which an explosive concentration of gases and vapors is possible only by accident or malfunction.

Class B-Ib are the same zones as Class B-Ia but have the following features:

  • combustible gases have a high lower concentration limit of flame spread (15% or more) and a sharp odor;
  • in the event of an accident in these areas, only local formation is possible! explosive concentration, which extends to a volume not exceeding 5% of the total volume of the room (zone);
  • flammable gases and liquids are used in small quantities without the use of open flames, in exhaust hoods, or under exhaust umbrellas.

According to PUE, if the volume of the explosive mixture exceeds 5% of the free volume of the room, then the whole room belongs to the corresponding class of explosives. If the volume of the explosive mixture is equal to or less than 5% of the free volume of the room, then the area of ​​the room within 5 m horizontally and vertically from the technological apparatus from which the release of combustible gases or steam of LZR is possible is considered explosive. Premises outside the explosive zone shall be considered explosive unless there are other factors that create an explosion hazard.

Class B-Ig – External installations containing explosive gases, vapors, liquids, the explosive concentration of which can be formed only by accident or malfunction.

Class B-II – Areas of premises where the formation of explosive concentrations of dust or fibers with air or other oxidizing agents may occur under normal, short operating conditions.

Class B-IIa – Areas similar to those of Class B-IIa, where explosive concentrations of dust and fibers can be generated only by accident or malfunction.

Class P-I – Areas of premises in which flammable liquids with a flashpoint above 61 ° C are used or stored.

Class P-II – Areas of premises where combustible dust or fibers with a lower concentration limit of the flame spread of more than 65 g / m3 of air volume or explosive dust are emitted, the contents of which do not reach explosive concentrations in the air of the premises.

Class P-IIa – Areas of rooms containing solid or fibrous combustibles. Combustible dust and fibers are not released.

Class P-III – External installations where flammable liquids with a flashpoint above 61 ° C are used or stored, as well as solids.

The zone class is determined by the technologist together with the electricians of the design or operational organization, based on the environmental characteristics.

According to the PUE, closed-loop electrical equipment is used in fire-hazardous areas, the interior of which is separated from the outside by a shell. Control and protection equipment, luminaires are recommended to be used in dustproof versions. All wiring must have sound insulation. Explosion-proof equipment manufactured in accordance with GOST 12.2.020-76 shall be used in hazardous areas and in external installations. Starting equipment, magnetic actuators for Classes B-I and B-II must be carried out outside of explosive rooms with remote control. Wires in explosive areas must be laid in metal pipes. The armored cable may be used. Luminaires for Classes B-I, B-II, B-IIa must also be explosion-proof.

About YIBAI LED LIGHTING

Our company as one of the best LED lights manufacturers mainly focuses on the Europe & North American market, the main product includes, LED high bays, low bays, canopy lights, shoebox lights, wall packs, gas station lights, lamp accessories, and LED modules, football lights, etc…as a leader in manufacturing and marketing of LED lighting. For providing a high-quality manufacturing environment and professional lighting assembly, we introduced many SMT automated production lines & advanced equipment and have the ability to do OEM/ODM orders. Please feel free to contact us if you are interested in our products and hope we could cooperate with each other and create a bright future for our business.

For more information about YIBAI LED lighting solutions for tennis court lighting systems including IES files, Dialux simulation reports, and technical datasheets, please visit www.yibai.lighting

Contact Us: Guangdong Yibai Optotech Co., Ltd

Tel: +86-13631786201

E-mail: [email protected]

What’s the manufacturing process technology of LED chips
LED heat dissipation technology and heat dissipation materials
How to find the right optic lens for LED lighting fixtures
Street lights with more energy saving boost for North Yorkshire tourism
How to choose a right LED shoebox light for your parking lot
outdoor lighting minimizes harm to insects UCLA study reveals
Magnetic Island, QLD introduces low color temperature LEDs to protect turtles
Questions in Dublin, Ireland about glare from 4000K LEDs
Riyadh, Saudi Arabia deploying 74,000 LEDs with smart controls
smart poles to improve amenity, safety, and convenience
smart controls led street lights convertions 37000 LED luminaires
25 Basic knowledge of lighting the application classifications
illuminance calculation
smart lighting control
Light pollution from street lamps linked to insect loss
Telensa demonstrates TALQ interoperability on Georgia street lights
Street Lighting in Smart Cities on energy savings, safety, and data analysis
Egypt to replace 1.5 million streetlights with energy-saving alternatives
Energy efficient LED street lights retrofitting project in New York State
Wairarapa in New Zealand is one step closer to creating the country’s largest dark sky reserve.
Parramatta leads way with the largest smart street lighting upgrade in NSW
Smart streetlights save Christchurch ratepayers $1.5m
Lighting Regions to slash millions in energy and maintenance costs
Bouygues to upgrade 43,000 street lights with LEDs and smart controls for Suffolk County Council, UK
Signify adds a lower-cost option to its smart street lighting stable
Six tips for indoor lighting design
Three-ways-of-bookstore-lighting-design-to-show-the-characteristics-and-charm-of-bookstores-1
Three requirements you must know about museum lighting designThree requirements you must know about museum lighting design
Four-major-trends-in-the-commercial-lighting-market-2
Professional-restaurant-lighting-design-unifying-the-beauty-of-food-and-the-dining-environment-2
Six-techniques-for-professional-plaza-lighting-design-6
Three-methods-you-need-to-know-about-professional-hotel-lobby-lighting-design-2
Professional shopping mall lighting design three tips you need to know
Requirements for lighting in food and beverage processing
What are the functions of smart street lights?
What are the characteristics of professional LED cold storage lamp
A comprehensive guide of professional tennis court lighting design
A classic flood lighting design Suzhou Industrial Park Sports Center
Real one Series LED Smart Street light (19)
Advantages and Disadvantages of lithium iron phosphate battery
best solar panel for cloudy conditions
All in one solar light S5 project(2)
Waterproof car wash lighting fixtures how to choose the best
Car wash lighting how we design professional lighting solution
Car workshops lighting how to make professional lighting design
Proper road lighting is a guarantee of traffic safety
Clearnroom lighting how we make professional lighting design
Tennis court lighting how we make professional lighting design
How to properly design a tunnel lighting system
Indoor basketball court how we design a professional LED lighting solution
Professional sports lighting fixtures how to choose the best solution
Football stadium lighting design how to make it professional
Indoor badminton court lighting how we make professional lighting design
How to control glare for swimming pool lighting
Indoor basketball court lighting
The unique design of the track field lighting
Choose professional LED stadium lights for football stadiums
Advantages & disadvantages of LED solar street light
How is IoT technology making our cities better and smarter?
Secure, sustainable smart cities and the IoT
people affected by unsuitable street light distribution
lumens depreciation of led street light
Best solutions for explosive zones lighting
What are the requirements for lighting mining quarries
Lighting for heavy industry mines
Exterior LED lighting
Upgrade your HPS HID Lamps to LED Lighting Fixtures in Greenhouse
Good public lighting
Upgrade your HPS HID Lamps to LED Street Lighting Fixtures
Reconstruction of street lighting
Lighting of underground parking lots, parking areas
Lighting illumination of pedestrian crossings
What are the requirements for lighting of roads and street
Degree of Protection IP and Class of Vandal Protection IK
Classification of explosive and fire-hazardous premises
LED Industrial lighting what kind of lamps and lanterns are good
Die cast alluminium alloy street light housing
SLA Series LED Sports Field light
What we need to pay attention when installing landscape lamps
What we need to pay attention when installing landscape lamps
YIBAI LED Street Lighting Projects
Smart City
LED landscape lighting
What lights should the football field be equipped with
YIBAI LED LIGHTING Projects
YIBAI LED LIGHTING Projects
What lights should the football field be equipped with