PDF | Explosive Atmospheres - Part 10-1: Classification of Areas - Explosive Gas Atmospheres - IEC 60079-10-1:2020
IEC 60079 Part 10-1 PDF Free Download: A Guide to Hazardous Area Classification and Equipment
If you work in an industry where explosive atmospheres may be present, such as oil and gas, petrochemicals, mining, or pharmaceuticals, you need to be aware of the standards and regulations that apply to your equipment and workplace. One of these standards is IEC 60079 Part 10-1, which provides guidance on how to classify areas where flammable gas or vapour hazards may arise.
iec 60079 part 10-1 pdf free download
IEC 60079 Part 10-1 is an international standard that is widely used and recognized around the world. It is part of the IEC 60079 series, which covers various aspects of explosive atmospheres, such as general requirements, protection techniques, equipment design, testing, installation, inspection, maintenance, etc.
The latest edition of IEC 60079 Part 10-1 was published in 2020, and it incorporates significant revisions from previous editions in both technical content and design approach. It also aligns with other related standards in the IEC 60079 series.
In this article, we will explain what IEC 60079 Part 10-1 is and why it is important for hazardous area classification and equipment. We will also highlight the main changes and benefits of the latest edition (2020), and show you how to download the PDF for free. Let's get started!
What is IEC 60079 Part 10-1 and why is it important for hazardous area classification and equipment?
IEC 60079 Part 10-1 is a standard that provides guidance on how to classify areas where flammable gas or vapour hazards may arise. It also specifies the requirements for the selection, installation, and marking of equipment intended for use in such areas.
The standard is important for several reasons:
It helps to ensure the safety of workers and the environment by preventing or minimizing the risk of fires and explosions caused by ignition of flammable substances.
It helps to comply with the legal and regulatory obligations that apply to hazardous areas and equipment in different countries and regions.
It helps to facilitate the trade and harmonization of equipment and services across different markets and industries.
The standard applies to both new and existing installations, and covers a wide range of industries and applications, such as:
Petroleum and natural gas production, processing, storage, and distribution
Petrochemicals, chemicals, and pharmaceuticals manufacturing and handling
Mining, tunneling, and quarrying
Power generation and distribution
Waste treatment and disposal
Paints, solvents, and coatings
Food and beverage processing
Automotive and aerospace manufacturing
Medical and laboratory equipment
What are the main terms and concepts related to explosive atmospheres?
To understand how IEC 60079 Part 10-1 works, it is essential to be familiar with some of the main terms and concepts related to explosive atmospheres. Here are some of the most important ones:
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TermDefinition
Explosive atmosphereA mixture of flammable substances in the form of gas, vapour, dust, or fibres with air or oxygen under atmospheric conditions that, after ignition, permits self-sustaining propagation.
Flammable substanceA substance that can form an explosive atmosphere when mixed with air or oxygen at certain concentrations and temperatures.
Source of releaseA point or area where a flammable substance can escape from its containment or process into the surrounding atmosphere.
Grade of releaseA classification of the frequency and duration of releases of flammable substances from sources of release. There are three grades: continuous (grade A), primary (grade B), and secondary (grade C).
VentilationThe movement of air or other gases in or out of an enclosed space by natural or artificial means. Ventilation affects the dilution and dispersion of flammable substances in an explosive atmosphere.
ZoneA classification of an area where an explosive atmosphere may occur. There are three zones for gas or vapour hazards: zone 0 (where an explosive atmosphere is present continuously or for long periods), zone 1 (where an explosive atmosphere is likely to occur occasionally in normal operation), and zone 2 (where an explosive atmosphere is not likely to occur in normal operation, or if it does, only for a short time).
Equipment protection level (EPL)A classification of the level of protection provided by equipment against ignition sources in explosive atmospheres. There are three EPLs for gas or vapour hazards: Ga (very high protection), Gb (high protection), and Gc (enhanced protection).
Equipment categoryA classification of equipment based on the zone where it can be used. There are three categories for gas or vapour hazards: category 1 (for use in zone 0), category 2 (for use in zone 1), and category 3 (for use in zone 2).
Protection techniqueA method or principle used to prevent ignition sources from equipment in explosive atmospheres. There are various protection techniques, such as flameproof enclosure (Ex d), intrinsic safety (Ex i), increased safety (Ex e), etc.
MarkingA set of symbols, letters, numbers, or other information that identifies the characteristics and performance of equipment for use in explosive atmospheres.
What are the general steps for classifying areas where flammable gas or vapour hazards may arise?
The standard provides a general approach and steps for classifying areas where flammable gas or vapour hazards may arise. The steps are as follows:
Identify and assess the sources of release of flammable substances in the area.
Determine the grade of release for each source of release, based on the frequency and duration of releases.
Estimate the extent and persistence of explosive atmospheres around each source of release, taking into account the properties of the flammable substances, the ventilation conditions, and the environmental factors.
Divide the area into zones according to the likelihood and persistence of explosive atmospheres.
Select and install equipment suitable for each zone, based on the equipment protection level, equipment category, and protection technique.
Mark the equipment and the area with appropriate symbols and information.
The standard provides detailed guidance and examples on how to perform each step, as well as tables and diagrams to assist the classification process. The standard also allows for alternative methods or data sources, as long as they are validated and documented.
What are the main changes and benefits of the latest edition (2020)?
The latest edition of IEC 60079 Part 10-1 was published in 2020, and it replaces the previous edition published in 2015. The new edition introduces significant changes and improvements in both technical content and design approach. Some of the main changes and benefits are:
The standard has been restructured and reorganized to make it more user-friendly and consistent with other related standards in the IEC 60079 series.
The standard has been revised and updated to reflect the latest scientific knowledge and industry practices on explosive atmospheres, sources of release, grades of release, ventilation, zones, etc.
The standard has added new definitions, examples, diagrams, tables, and annexes to clarify and illustrate the concepts and methods for area classification.
The standard has aligned with other related standards in the IEC 60079 series, such as IEC 60079-0 (general requirements), IEC 60079-14 (electrical installations), IEC 60079-20-1 (material characteristics), etc.
The changes and benefits of the new edition are expected to enhance the safety, reliability, and efficiency of hazardous area classification and equipment. They are also expected to facilitate the trade and harmonization of equipment and services acr