Building a Machine from ATEX-Certified Components: Is the Complete Assembly Compliant?
ATEX COMPLIANCE
You have an Ex motor, certified junction boxes, suitable glands and instruments with the right markings. Procurement has done its job. But there is still a question nobody should leave until FAT: what about the machine you created when you connected everything together?
ATEX compliance is not simply the sum of the component certificates. Integration can introduce ignition hazards and interfaces that did not exist when the individual products were assessed.
The assembly has its own behaviour
A motor may be suitable for the hazardous area, while the driven equipment creates heat through friction. A certified enclosure may be installed correctly, while a nearby process surface exceeds an acceptable temperature. A brake, coupling, belt, bearing arrangement or control strategy can change the ignition-risk picture of the complete equipment.
The project therefore needs to look at the assembled product as a functioning system, not a purchasing list.
Who is acting as the manufacturer?
Under ATEX 2014/34/EU, obligations attach to the manufacturer placing equipment or protective systems on the market or putting them into service within the directive’s scope. When a project integrates components into a new product, the role and responsibility for conformity assessment, technical documentation, marking and the EU Declaration of Conformity need to be established clearly.
This is particularly important on one-off industrial equipment, where engineering, fabrication, electrical integration and controls may be split across several companies. Five suppliers can each deliver their own scope correctly and still leave nobody owning the conformity of the finished machine.
Interfaces need engineering evidence
The technical file should explain the complete design logic: intended use, identified ignition hazards, component selection, applicable standards, drawings, calculations or assessments, instructions and the evidence supporting conformity.
Component certificates are valuable inputs. They are not a substitute for reviewing what the integration changed.
Assign compliance ownership before interfaces multiply
The cleanest project structure is to decide early who owns the complete equipment definition and conformity route. That person or organisation needs access to the component documentation and enough control over design changes to keep the technical basis aligned with what is actually built.
GravityX works as one project interface across engineering, fabrication coordination and compliance-driven execution. For ATEX assemblies, that means treating conformity as part of system engineering rather than a certificate-collection exercise at the end.
Assess the system
Name the owner
