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Komise : CEN/TC 305 (Potentially explosive atmospheres. Explosion prevention and protection)
Původce: CEN
K připomínkám do: 25.03.2019
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This document specifies requirements for design, construction, testing and marking of hand-held, portable and transportable vacuum cleaners and dust collectors, including their accessories, constructed to Group II categories 2G and 3G and to Group II categories 2D and 3D, intended for the collection of combustible or non-combustible dusts and flammable or non-flammable liquids in potentially explosive atmospheres. A potentially explosive atmosphere may be generated by the equipment during its intended use. It covers equipment driven by electricity and by pneumatic power.

This document deals with all significant hazards, hazardous situations and events relevant to vacuum cleaners and dust collectors, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer.

Typical applications for the concerned equipment are:

—    Collection of dust produced by machinery at the point of generation;

—    General housekeeping around machinery and of working areas; and/or

—    Collection of spills.

For other specific applications a specific assessment shall be performed.

This document does not cover equipment used to collect toxic dusts where there is a health risk if dust passes through the filter element. This document does not cover either the collection of dusts which have explosive and unstable properties (UN transport class 1, class 4.1 and class 5.2).

This document covers vacuum cleaners with an internal dust loaded volume of maximum 200 l.

This document does not apply to pumps, where the inlet nozzle is submerged into a liquid, and all conveying applications.

This document does not apply to Group I vacuum cleaners and dust collectors for mining.

For an easier readability, all types of equipment concerned by this standard are referred as “Vacuum cleaner” in this document.

NOTE          Collecting dust is recognized as a suitable action in view to participate to prevention against explosion.

Komise : CEN/TC 305 (Potentially explosive atmospheres. Explosion prevention and protection)
Původce: CEN
K připomínkám do: 25.03.2019
Zobraz více Zobraz méně
 

This document describes the basic requirements for the design and application of explosion suppression systems. This document also specifies test methods for evaluating the effectiveness and the scale up of explosion suppression systems against defined explosions. This document covers:

—    general requirements for explosion suppression system components;

—    evaluating the effectiveness of an explosion suppression system;

—    evaluating the scale up of an explosion suppression system;

—    development and evaluation of design tools for explosion suppression systems;

—    installation, operation and maintenance instructions for an explosion suppression system.

This document is applicable only to explosion suppression systems intended for the protection of closed, or essentially closed, enclosures in which an explosion could result as a consequence of ignition of an explosible mixture, e.g. dust-air, gas(vapour)-air, dust-gas(vapour)-air and mist-air.

This document is not applicable for explosions of materials listed below, or for mixtures containing some of those materials:

—    unstable materials that are liable to dissociate;

—    explosive materials;

—    pyrotechnic materials;

—    pyrophoric materials.