IEC 60825-4:2022 PDF

Overview - IEC 60825-4:2022 (Safety of laser products - Part 4: Laser guards)

IEC 60825-4:2022 sets international requirements and guidance for laser guards - permanent and temporary enclosures, screens, viewing windows, panels, curtains and walls used to enclose the process zone of laser processing machines. The standard addresses human access, interlocking, labelling, design of protective housings for high‑power lasers, and how to assess and specify the protective properties of a guard. It clarifies that compliance with laser protective eyewear standards alone may be insufficient to meet the requirements of this document.

Key topics and technical requirements

• Scope of guards: applies to all component parts of a guard including clear (visibly transmitting) screens, viewing windows, panels, curtains and walls.
• Design, performance and validation: requirements cover guard design, mechanical/construction considerations, performance testing and validation procedures.
• Interlocking and human access: requirements and guidance for interlocks, access control and minimizing foreseeable exposure to laser radiation.
• Labelling and user information: mandatory marking, documentation and information for safe installation, operation and maintenance.
• Proprietary laser guards: specific requirements for factory-supplied (proprietary) guards including specification, testing and labelling.
• Assessment and selection: guidance on assessing Foreseeable Exposure Limit (FEL) and Protective Exposure Limit (PEL) and on selecting an appropriate guard for a given application.
• Testing and annexes: normative and informative annexes provide test methods for proprietary guards (Annex D), risk assessment and installation guidance (Annexes E–F), assessment of reflections and exposure duration (Annex B), and guidance for guided beam delivery systems (Annex G).

Practical applications and who uses this standard

IEC 60825-4:2022 is essential for:

• OEMs and integrators of laser processing machines
• Safety engineers and compliance officers responsible for laser safety
• Machine designers and enclosure manufacturers (guards, windows, curtains)
• Test laboratories and certification bodies evaluating guard performance
• Maintenance and service teams implementing temporary service guards

Typical applications include laser cutting, welding, marking and material processing systems where high‑power beams must be contained to protect operators and bystanders.

Related standards

• IEC 60825 series (general laser safety standards) - use together with Part 4 for comprehensive laser product safety.
• Standards for laser protective eyewear (note: eyewear compliance may not be sufficient alone to meet Part 4 requirements).

Keywords: IEC 60825-4:2022, laser guards, laser safety, interlocking, protective housings, proprietary laser guards, guard testing, laser processing machine, risk assessment.