DSEAR Glossary

Term	Description	Applicability / Standard
Area Classification	Classification of a plant into specific Zones related to the liklehood of a hazardous area being present durng normal operation within specified parameters	Where hazardous areas exist
ATEX
ATEX 137
ATEX 95
Category 1	Categorisation of exquipment certified for use in a hazardous area specific to the a particular certification	Zone 0, Zone 1 and Zone 2 use
Category 2	Categorisation of exquipment certified for use in a hazardous area specific to the a particular certification	Zone 1 and Zone 2 use
Category 3	Categorisation of exquipment certified for use in a hazardous area specific to the a particular certification	Zone 2 use only
COMAH	Control of Major Hazards regulations
Constructional safety	Mechnical protection concept for ex equipment, using sound engineering principles
Detonation
DSEAR	Dangerous Substances and Explosive Atmospheres Regulations 2002	United Kingdom
Encapsultation	Specific type of protection involving the encapsulation of potential ignition sources within a resin type medium to prevent the hazard area reaching this potential ignition source
Enclosed break
Energy Limited
EX	Term associated with explosion protected equipment
Ex b
Ex c	Constructional Safety -Non-electrical protection concept . Constructional measures are applied so as to protect against the possibility of ignition from hot surfaces, sparks and adiabatic compression generated by moving parts
Ex d	Flameproof - Both electrical and non-electrical form of protection
Ex e	Increased Safety - Electrical equipment protection concept
Ex fr	Flow Restriction - Non-electrical protection concept
Ex g
Ex i	Intrinsic safety - electrical protection concepts	See below
Ex ia	Intrinsic safety protection concept with 2 countable faults applied	Zone 0, Zone 1 and Zone 2 use
Ex ib	Intrinsic safety protection concept with 1 countable fault applied	Zone 1 and Zone 2 use
Ex ic	Intrinsic safety protection concept for normal operation	Zone 2 use only
Ex iD
Ex k
Ex m	Specific type of protection involving the encapsulation of potential ignition sources within a resin type medium to prevent the hazard area reaching this potential ignition source
Ex mD	Specific type of protection involving the encapsulation of potential ignition sources within a resin type medium to prevent the hazard area reaching this potential ignition source in a dust environment
Ex n	Non sparking protection concept using various methodologies as shown below	Zone 2 use only
Ex nA		Zone 2 use only
Ex nC		Zone 2 use only
Ex nL		Zone 2 use only
Ex nR		Zone 2 use only
Ex o
Ex p
Ex pD
Ex pz
Ex q
Ex s
Ex tD
Flameproof	Flameproof - Both electrical and non-electrical form of protection where the enclosure can withstand and internal explosion without transmitting this to the external hazardous area	Zone 1 and Zone 2 use
Flashpoint
Flow restriction
Hermetically sealed
Ignition Assessment
Increased safety
Ingress Protection	Protection for the ingress of either solids or liquids, used for several specific forms of protection	EN60529
Intrinsic safety
Liquid Filled
Non-sparking
Oil Filled
PFER	The Prevention of Fire and Explosion Regulations, relating to offshore installations
Pressurisation
Protection by Enclosures
Purged
Quartz filled
Restricted breathing
Sealed or encapsulated
Simplified pressurisation
Zone 0
Zone 1
Zone 2
Zone 20
Zone 21
Zone 22

Training courses

Through our parent company we can provide training courses for any aspect of compliance, from CE Marking for Machinery, Functional Safety and Low Voltage equipment through to Hazardous Areas and Pressure Equipment a brief overview is shown below We offer a range of courses for DSEAR compliance and plant management

We offer a range of courses for ATEX Equipment, from design for compliance to maintenance and inspection.

Example Marking (ATEX Mark)

All equipment certified under the ATEX Directive 94/9/EC, must be appropriately marked, and the main identification symbol which must be placed on the equipment is shown opposite.

This must be followed by the appropriate code for the type on environment where the equipment can be used.

Such as

II 2 G/D

The first letters (II) represent the group of the Equipment. in this example for above ground use.

The second numeral (2) relates to the Category of equipment, either 1, 2 or 3 depending on the severity of the environment.

Equipment Categories

The ATEX Directive, in Annex I, defines five categories of equipment:

M1 and M2 (mining use)

CAT 1, CAT 2, and CAT 3 (non-mining use)

Finally, the remaining letters indicate either (G) a Gaseous environment or (D) a Dust environment or as in our case both