Are hand tools required to be ATEX-marked or non-sparking in Zone 1?

Simple hand tools are not ATEX products: spanners, hammers and screwdrivers have no ignition source of their own, so they fall outside the ATEX product directive and there is no ATEX certificate or category to ask for. No EU rule makes non-sparking tools mandatory in Zone 1 as such: the employer's risk assessment and permit-to-work decide which tools may be used, and for hydrogen, acetylene and other very sensitive gases the safer answer is to make the work area gas-free rather than rely on the tool material.

Short answer

• ATEX marking: the European Commission's ATEX Guidelines name hand tools such as hammers, spanners, saws and ladders as examples of products without their own ignition source, so Directive 2014/34/EU does not apply to them. An "ATEX hand tool" claim describes the material, not a conformity assessment.
• Who decides: tool use is a workplace matter under Directive 1999/92/EC. The Explosion Protection Document and the permit system set the rules for each area and job.
• One national rule (Germany, TRGS 723): high-grade steel tools are acceptable in Zones 1 and 2 if they throw no spark showers and make no hot surfaces, but no metallic tools at all in Zone 1 with IIC gases, hydrogen sulphide, carbon monoxide or ethylene oxide unless special measures prevent incendive sparks.
• Non-sparking tools (copper-beryllium, aluminium-bronze) lower the risk but do not remove it. They are one such special measure only within strict conditions.
• Grinding, cutting, chiselling and drilling steel produce many sparks or hot surfaces and are hot work, whatever the tool.
• Power tools are different: a battery drill or impact wrench is electrical equipment with its own ignition source and needs suitable Ex certification for Zone 1, or a gas-free permit.

Why a spanner has no ATEX certificate

Directive 2014/34/EU covers equipment that has its own potential source of ignition, plus protective systems and safety devices. The Commission's ATEX 2014/34/EU Guidelines (6th edition, January 2026) give hand tools as the textbook example of products outside that scope, and their borderline list repeats it for tools such as hammers and tongs and for ladders of any material. A hand tool only becomes an ignition source when a person uses it to strike, rub or cut something, so the hazard lies in the work, not in the product.

The consequence for permit writers is practical: there is no certificate or category to check on a hand tool, so "ATEX-approved spanners only" is not a meaningful specification. Write the requirement in terms of material, condition and method instead.

Powered tools are a different case. A cordless drill, an electric impact wrench or an inspection lamp contains electrical ignition sources, so it is equipment in the sense of the directive. In Zone 1 it needs at least category 2G (EPL Gb) for the gas group and temperature class, or the job is done under a permit after the area is made free of explosive atmosphere. Air-powered tools have moving parts and must also be assessed; check whether the tool is marked for the zone.

How the employer decides which tools are allowed

Where the Explosion Protection Document requires it, Annex II of Directive 1999/92/EC calls for written instructions from the employer for work in hazardous places and a permit-to-work system for hazardous activities, with permits issued by a responsible person before work starts. The directive gives no tool list; it leaves that to the risk assessment, which normally considers:

1. The zone and the substance. Gas group and minimum ignition energy matter most. TRGS 723 notes that a single spark from a spanner or screwdriver rarely ignites an explosive atmosphere, but that with IIC gases ignition must always be assumed.
2. The type of work. Tools that normally give at most a single spark (spanners, pliers, screwdrivers) are treated differently from work that throws many sparks or spark showers (chiselling, grinding, abrasive cutting).
3. The impact energy and the surfaces. A heavy hammer blow on rusty steel is a different hazard from turning a nut.
4. Whether the atmosphere can be removed. Isolation, draining, purging or ventilation, followed by a gas test and continuous monitoring, removes the explosive atmosphere instead of trying to make the spark harmless.

The German technical rule TRGS 723 is one published interpretation that many sites use as a reference:

EN 1127-1 also contains an informative annex on the use of tools in potentially explosive atmospheres. Other countries and many operating companies have their own rules, so the site documents prevail.

Practical case: opening a flange in Zone 1

A fitter must change a gasket on a propane line flange in a Zone 1 area (gas group IIA). The permit requires the line to be isolated and drained, a gas test at the flange before work, and a portable detector during the job. Good-quality steel spanners are acceptable under a TRGS 723-type rule, because unbolting produces at most single sparks and the atmosphere has been removed. Seized bolts may not be cut with a grinder; that needs a hot work permit.

On a hydrogen line (IIC) the same job needs more: isolation, nitrogen purging and a gas test showing no flammable gas. Non-sparking spanners are still used, but as an additional layer, not as the main barrier.

Common mistakes

• Treating non-sparking tools as a licence to work in gas. They reduce impact spark ignition but do not prevent friction heating or sparks from rusty steel or grit, and they are not reliable alone for IIC gases.
• Using copper-alloy tools on acetylene systems. Copper can form shock-sensitive acetylides; see non-sparking tools.

Related on excodex

• Non-electrical equipment in hazardous areas: Ex h, constructional safety c, control of ignition sources b and liquid immersion k
• Ignition sources in hazardous areas: the 13 ignition sources and how to control them
• Hot work permits in hazardous areas
• Do non-sparking tools really prevent ignition in hazardous areas?
• Standards spaces: ATEX 1999/92/EC, EN 1127-1

Standards and further reading

• European Commission ATEX 2014/34/EU Guidelines, 6th edition (January 2026), § 38 and the borderline list: single-market-economy.ec.europa.eu
• Directive 1999/92/EC, Annex II Part A 1.2 (written instructions and permits to work): legislation.gov.uk
• TRGS 723 (German technical rule on avoiding ignition of explosive mixtures), sections 5.4.1 and 5.15 (in German): bgn-branchenwissen.de
• EN 1127-1:2019, explosion prevention and protection; informative Annex A on tools (preview of contents): standards.iteh.ai

This article is general technical information prepared by the excodex editorial team. It does not replace the applicable standards, the equipment certificates and instructions, national regulations or the assessment of a competent person.