ATEX Module B Explained

ATEX Module B, officially known as EU-Type Examination, is one of the conformity assessment procedures defined under the ATEX Directive 2014/34/EU. It requires an independent ATEX Notified Body to examine the technical design of explosion-protected equipment and verify that it complies with the essential health and safety requirements of the Directive before the product can be placed on the European market.

Module B is commonly used for Category 1 and Category 2 equipment intended for hazardous areas. It forms the technical foundation of several ATEX conformity assessment routes and is typically followed by additional production conformity modules, such as Module C2, Module D, or Module E.

This article explains what ATEX Module B is, how the EU-Type Examination process works, what documentation is required, and how Module B fits within the overall ATEX certification framework.

Quick Answer

What Is ATEX Module B?

ATEX Module B is the conformity assessment procedure used to evaluate the technical design of equipment intended for use in potentially explosive atmospheres. It is performed by an ATEX Notified Body that independently reviews the product before it is placed on the market.

The purpose of Module B is to confirm that a representative sample, known as the type, satisfies the applicable requirements of the ATEX Directive. This assessment includes examination of the product design, technical documentation, applicable standards, and, where necessary, laboratory testing.

Module B does not assess routine manufacturing quality or production control. Instead, it focuses on verifying that the product design itself complies with the Directive.

Why Is Module B Required?

Equipment used in hazardous areas must provide an appropriate level of explosion protection throughout its service life. For higher-risk equipment categories, European legislation requires independent third-party evaluation before products can be placed on the market.

Module B provides this independent verification by requiring a Notified Body to review the equipment's design and supporting technical documentation.

The procedure helps ensure that:

• The equipment complies with the essential health and safety requirements of the ATEX Directive.
• The selected explosion protection concept has been correctly implemented.
• The product has been evaluated against the applicable harmonized standards.
• The design is suitable for its intended hazardous area classification.

Who Performs ATEX Module B?

ATEX Module B may only be performed by an ATEX Notified Body officially designated by a European Union Member State under Directive 2014/34/EU.

The Notified Body independently evaluates the submitted product and technical documentation before deciding whether the equipment satisfies the requirements for EU-Type Examination.

If the evaluation is successful, the Notified Body issues an EU-Type Examination Certificate, which confirms that the assessed product type complies with the applicable ATEX requirements.

What Documentation Is Required?

To complete the EU-Type Examination, the manufacturer must submit sufficient technical information for the Notified Body to evaluate the product.

Typical documentation includes:

• Technical file.
• Engineering drawings.
• Product description.
• Explosion protection concept.
• Risk assessment.
• Applicable harmonized standards.
• Test reports.
• Equipment marking details.
• Operating instructions.

The Notified Body reviews these documents together with the product itself to determine whether the equipment complies with the ATEX Directive.

How Does the ATEX Module B Process Work?

ATEX Module B follows a structured conformity assessment procedure in which an independent ATEX Notified Body evaluates the technical design of explosion-protected equipment before it can be certified.

A typical Module B process includes the following steps:

1. The manufacturer submits an application to an ATEX Notified Body.
2. The technical file and supporting documentation are reviewed.
3. The representative product (the "type") is examined.
4. Testing and technical evaluations are performed where required.
5. The Notified Body verifies compliance with Directive 2014/34/EU and the applicable harmonized standards.
6. If all requirements are satisfied, an EU-Type Examination Certificate is issued.

The assessment focuses on the approved product type rather than routine production of every unit manufactured.

What Does the Notified Body Evaluate?

During Module B, the Notified Body performs a detailed review of both the product and its technical documentation.

The assessment typically includes:

• Equipment design and construction.
• Explosion protection concept.
• Selection and application of harmonized standards.
• Engineering calculations.
• Temperature classification.
• Equipment marking.
• Risk assessment.
• Laboratory test results where applicable.
• Operating instructions.

The objective is to confirm that the representative product type satisfies the applicable essential health and safety requirements of the ATEX Directive.

What Is Issued After Module B?

If the equipment successfully passes the EU-Type Examination, the ATEX Notified Body issues an EU-Type Examination Certificate.

The certificate generally includes:

• Certificate number.
• Manufacturer identification.
• Product identification.
• Applicable ATEX Directive.
• Applicable harmonized standards.
• Explosion protection marking.
• Special conditions for safe use, where applicable.
• Certification limitations.

The certificate demonstrates that the approved product type complies with the technical requirements evaluated during Module B.

Does Module B Authorize Product Sales?

Not by itself.

Module B confirms that the representative product type has successfully completed the EU-Type Examination. However, manufacturers must also satisfy the applicable production conformity requirements before placing certain categories of equipment on the European market.

Depending on the equipment category, Module B is typically followed by another conformity assessment module, such as:

Module	Purpose
Module C2	Conformity to type based on supervised product checks.
Module D	Production quality assurance.
Module E	Product quality assurance.
Module F	Product verification.

The applicable follow-up module depends on the equipment category and the manufacturer's chosen conformity assessment route under Directive 2014/34/EU.

Which Equipment Requires Module B?

Module B is primarily used for higher-risk ATEX equipment that requires independent third-party assessment.

Equipment Category	Typical Requirement
Category 1	Module B followed by an appropriate production conformity module.
Category 2	Often requires Module B with an additional conformity assessment module.
Category 3	Generally does not require Module B and may follow internal production control procedures, depending on the applicable conformity assessment route.

Manufacturers should always determine the correct conformity assessment procedure based on the equipment category, intended application, and the requirements of Directive 2014/34/EU.

Common Misunderstandings About ATEX Module B

Module B Is the Complete ATEX Certification Process

No. Module B covers only the EU-Type Examination of the product design. For many categories of equipment, additional conformity assessment modules are required to demonstrate that production continues to conform to the approved type.

Module B Certifies Every Product Manufactured

No. Module B evaluates a representative product type rather than every individual unit produced. Ongoing production conformity is addressed through the applicable follow-up conformity assessment module.

Manufacturers Can Perform Module B Themselves

No. Module B must be performed by an ATEX Notified Body designated under Directive 2014/34/EU. Manufacturers cannot issue their own EU-Type Examination Certificates.

Module B Applies to All ATEX Equipment

No. The conformity assessment procedure depends on the equipment category and the requirements specified in Directive 2014/34/EU. Some lower-risk equipment may follow different conformity assessment procedures.

Frequently Asked Questions (FAQ)

What is ATEX Module B?

ATEX Module B is the EU-Type Examination procedure defined in Directive 2014/34/EU. It involves an independent evaluation of a product's technical design by an ATEX Notified Body before certification.

Who performs ATEX Module B?

Only an ATEX Notified Body officially designated under Directive 2014/34/EU is authorized to perform Module B and issue an EU-Type Examination Certificate.

What certificate is issued after Module B?

If the equipment satisfies the applicable ATEX requirements, the Notified Body issues an EU-Type Examination Certificate.

Does Module B include production quality assessment?

No. Module B evaluates the product type and its technical design. Production quality assurance is addressed through separate conformity assessment modules such as Module D or Module E, depending on the applicable conformity assessment route.

Is Module B mandatory for all ATEX equipment?

No. The applicable conformity assessment procedure depends on the equipment category and the requirements of Directive 2014/34/EU.

Conclusion

ATEX Module B is the EU-Type Examination procedure that verifies the technical design of explosion-protected equipment before it is placed on the European market. By independently reviewing the product design, technical documentation, and applicable standards, an ATEX Notified Body confirms whether the representative product type complies with the requirements of Directive 2014/34/EU.

Although Module B is one of the most important conformity assessment procedures within the ATEX framework, it normally represents only one stage of the overall certification process. Depending on the equipment category, manufacturers must also complete the appropriate production conformity assessment module before placing equipment on the market.

Technical Review

References

• Directive 2014/34/EU of the European Parliament and of the Council.
• European Commission – ATEX Guidelines for Directive 2014/34/EU.
• EN IEC 60079 Series – Explosive Atmospheres.
• Blue Guide on the Implementation of EU Product Rules.
• ISO/IEC 80079 Series.