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What the ATEX Directive 2014/34/EU requires: zones, equipment categories, marking and obligations for manufacturers at a glance.
As soon as gases, vapors, or dusts in the air can form an explosive atmosphere, every piece of equipment in use becomes a safety risk if it isn’t designed for that environment. This is exactly where the ATEX Directive comes in: it gives manufacturers a binding framework for which requirements their products must meet before they can be used in potentially explosive atmospheres. At its core, the goal is always the same: the safety of workers and other people who may come into contact with equipment and dust or gas.
In practice, manufacturers keep running into the same questions. Which zone applies to which area of use? What marking has to appear on the equipment? And when is a certification body mandatory for the conformity assessment? Anyone who doesn’t answer these questions cleanly risks delays in placing the product on the market, or in the worst case, a safety risk in the field.
ATEX stands for the French term “atmosphères explosibles” and refers to two linked EU directives on explosion protection:
As part of the EU’s New Legislative Framework, it harmonizes the legal provisions of the member states. The goal is the free movement of equipment and protective systems within the EU, without every country imposing its own, diverging requirements. In Germany, the directive was transposed into national law through the Explosion Protection Products Ordinance (11th ProdSV). For practical application, the European Commission provides an accompanying guide that clarifies many interpretation questions around equipment categories and conformity assessment.
The directive sets out essential health and safety requirements for equipment and protective systems intended for use in potentially explosive atmospheres. These requirements are made concrete through harmonized European standards, in particular the EN 60079 and EN 80079 series. If a manufacturer applies the relevant standards, a presumption of conformity applies to its product.
At its core, the entire body of explosion protection rules serves a single principle: avoid ignition sources before they become a hazard to people and equipment.
he ATEX Product Directive applies to manufacturers of equipment, protective systems, and components used in potentially explosive atmospheres. This includes both electrical and non-electrical equipment, such as mechanical pumps, fans, or tools. Besides manufacturers, importers, distributors, designers, and technical writers are also affected as soon as they’re involved in bringing a product to market or in its documentation.
The directive distinguishes between two equipment groups:
The rule of thumb: the lower the category number, the higher the required safety level, since the equipment is used in more critical zones.
Before placing a product on the market, the manufacturer must demonstrate that it meets the essential safety requirements and has undergone a conformity assessment procedure. Only then may a product carry CE and Ex marking and be placed on the market in the EU.
ATEX zones are the basis for determining which equipment can be used where. Classification depends on how often and how long an explosive atmosphere can occur in a given area. A distinction is made between gas-Ex areas and dust-Ex areas, since different ignition sources and propagation paths apply and therefore carry different explosion hazards.
Zones 0, 1, and 2 apply to gases, vapors, and mists. The corresponding zones 20, 21, and 22 apply to dusts. The underlying logic is identical:
This classification directly determines which equipment category is permitted. Category 1 equipment may be used in zone 0, category 2 equipment in zone 1, and category 3 equipment in zone 2. Anyone using equipment in the wrong zone potentially creates an ignition source themselves, and with it a safety risk for personnel and the plant.
In addition to zone classification, a distinction is made between gas groups (IIA, IIB, IIC) and dust groups (IIIA, IIIB, IIIC), depending on how easily the respective gas or dust ignites. In plants where gases and dusts can occur together, manufacturers must account for the combination of both explosive atmospheres in their risk assessment. Depending on operating conditions, different combinations of zone, equipment group, and gas group result, and the manufacturer must reflect these correctly in its technical documentation.
Every piece of equipment approved under ATEX carries its own marking. The most visible element is the hexagonal Ex symbol, which identifies a piece of equipment as ATEX-compliant.
Alongside this, the marking also includes information on:
The temperature class indicates the maximum surface temperature a piece of equipment is allowed to reach so that it doesn’t become an ignition source itself. Six temperature classes are defined for gases, from T1 to T6, with T6 being the strictest classification. The type of protection, in turn, describes the technical principle used to protect a piece of equipment against an explosion, for example through constructional safety or encapsulation.
Whether a piece of equipment needs an ATEX certificate, meaning an EU type-examination certificate, depends on the equipment category and the intended area of use:
After a successful conformity assessment, the manufacturer issues an EU declaration of conformity and affixes CE and Ex marking to the product. This fulfills the formal requirement for the free movement of goods within the EU. Building these requirements into product development from the start saves manufacturers later rework on both the equipment and the documentation.
Safe operation in zone 0 places the highest demands here: for category 1, the strictest level of protection applies. Safeguarding the health of employees remains at the center of every risk assessment.
Actual explosion protection begins at the design stage. Manufacturers must design technical measures so that their product doesn’t become an effective ignition source, even under the intended operating conditions. This applies equally to electrical and non-electrical equipment, such as fans, pumps, or tools used in potentially explosive atmospheres. The applicable rules come from the harmonized standards linked to the ATEX Directive and are supplemented by national implementations such as the Explosion Protection Products Ordinance.
Alongside the technical design, an instruction manual is required that contains all safety-relevant information:
This documentation must remain correct, current, and available in the language of the country of use throughout the entire product lifecycle, so that safe operation at the customer’s site is possible at all.
This is exactly where ATEX becomes an operational problem for many manufacturers, not just a legal one. Declarations of conformity, marking records, and instruction manuals often exist in multiple language versions, for multiple product variants, and across multiple approval cycles. When these documents are scattered across folders, file servers, and email inboxes, every update, every language version, and every customer inquiry turns into manual searching.
4ALLPORTAL brings product content and technical documents together in one central structure: declarations of conformity, marking records, and instruction manuals can be maintained per product variant, zone, and language version, and distributed automatically to sales, customers, and partner portals. This keeps it traceable which documentation belongs to which product version, without individual people becoming a bottleneck.
ATEX stands for the French term “atmosphères explosibles” and refers to two EU directives on explosion protection: the Product Directive 2014/34/EU for manufacturers and the Workplace Directive 1999/92/EC for operators and employers.
In Zone 1, an explosive atmosphere is likely to occur occasionally during normal operation, while in Zone 2 it is only likely to occur rarely and briefly, for example during a malfunction. Accordingly, stricter equipment requirements apply to the first area than to the second.
The manufacturer of the equipment or protective system is responsible for correct marking. The manufacturer ensures the conformity assessment is carried out, issues the EU declaration of conformity, and affixes CE and Ex marking to the product, where applicable in cooperation with a notified body.
Yes. Both electrical and non-electrical equipment and protective systems are explicitly covered, such as mechanical pumps, fans, or tools used in potentially explosive atmospheres.
The ATEX Directive gives manufacturers a clear but complex framework: correct zone classification, the right equipment category, accurate marking, and complete technical documentation all have to come together so a product can be safely placed on the market. For many manufacturers, the real challenge lies less in the regulatory content itself and more in keeping declarations of conformity, marking records, and instruction manuals current and findable across product variants, zones, and language versions.
Anyone who manages technical documentation centrally instead of scattering it across folders and inboxes reduces exactly this risk and gains a clear overview of which records belong to which product version.
Dominic Vieregge
Director Service Operations
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