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  • BSI
    20/30399625 DC BS EN 746-3. Industrial thermoprocessing equipment - Part 3. Safety requirements for the generation and use of atmosphere gases
    Edition: 2020
    $42.22
    / user per year

Description of 20/30399625 DC 2020

This part of the EN 746 series specifies safety requirements for generation and use of protective and reactive atmosphere gases that are part of industrial thermo-processing equipment (TPE).

NOTE

The general safety requirements common to TPE are provided in prEN 746‑1 (see Introduction).

This part of the EN 746 series deals with significant hazards, hazardous situations and events relevant to the generation and use of protective and reactive atmosphere gases created by thermochemical reactions and their use in TPE that are part of TPE as listed in Clause 4 and Clause 5, when used as intended and under the conditions foreseen by the manufacturer.

This part of the EN 746 series covers

  • pipework downstream of and including the manual isolating valve,

  • equipment for the generation of atmosphere gases,

  • additional equipment for the use of atmosphere gases in TPE,

  • safety devices, and

  • functional requirements for safety related control system

for the generation and use of protective and reactive atmosphere gases.

It applies to the supply of atmosphere gas, source gas, inert gas and process liquids to TPE and their removal from TPE, confined to equipment integrated in the TPE.

This part of the EN 746 series also details the anticipated significant hazards associated with atmosphere gas systems and their use in TPE and specifies the appropriate preventative measures for the reduction or elimination of these hazards.

The pressure hazard of the piping and components covered by this standard is within the maximum pressure/size relationship of group I as described in Annex C.

This part of the EN 746 series

  • specifies the requirements to be met to ensure the safety of persons and property during installation, commissioning, start up, operation, shutdown and maintenance,

  • does not cover the relevant risks involved in the flue gas ducting system when it is not considered a part of TPE,

  • is not applicable to utility supply upstream of the TPE main disconnects,

  • does not apply to TPE for semi-conductor devices,

  • does not apply to TPE with atmosphere, such as air and flue gas from an over stoichiometric combustion,

  • does not cover the decommissioning of the TPE,

  • does not cover vacuum furnaces,

  • does not deal with the hazard of noise which is covered in prEN 746-1:2020,

  • is not applicable to generation and use of atmosphere gas in TPE and associated plant which is manufactured before the date of its publication, and

  • gives the necessary requirements for the information for use.

A TPE designed according to this part of EN 746 series does not create any potentially explosive atmosphere in the area around the TPE and is not designed to be located in an area with a potentially explosive or hazardous atmosphere.

A table of typical protective and reactive gases is given in Annex B.



Standard Number20/30399625 DC
TitleBS EN 746-3. Industrial thermoprocessing equipment - Part 3. Safety requirements for the generation and use of atmosphere gases
StatusDefinitive
Publication Date2020-02-03
Identical National Standard OfprEN 746-3
DescriptorsHeat engineering components, Production equipment, Industrial, Group 0 elements, Heating equipment, Explosive atmospheres, Accident prevention, Gases, Control equipment, Furnaces, Gas generating systems, Burners, Chemical composition, Safety devices, Instructions for use, Gas generators, Gas technology, Occupational safety, Atmosphere, Hazards, Equipment safety, Safety measures, Density, Marking
ICS25.180.01 Industrial furnaces in general
CommitteeMCE/3/8
PublisherBSI
Pages70

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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