When Do You Need to Inspect Your ATEX Equipment in South Africa?

ATEX / Ex equipment inspection requirements explained for South African hazardous locations

Explosion-protected (Ex) equipment is not a “fit and forget” solution.
In South Africa, if your facility operates in a hazardous location — such as oil & gas, petrochemical, mining, grain handling, fuel storage, pharmaceutical, or chemical processing — you are legally responsible for ensuring that your ATEX equipment remains safe throughout its operational life.

The critical question is not whether inspections are required.
The real question is:

When must ATEX equipment be inspected under South African regulations?

Let’s break it down clearly.

What South African Law Requires

Hazardous area equipment falls under:

• The Occupational Health and Safety Act (OHS Act)

• The Electrical Machinery Regulations

• SANS standards aligned with the IEC 60079 series

While the law does not prescribe a fixed inspection interval (e.g., “every 12 months”), it places a clear duty on the employer or plant owner to:

• Ensure equipment is suitable for the classified hazardous zone

• Maintain equipment in a safe condition

• Inspect and verify explosion protection integrity

• Keep documented proof of compliance

Failure to demonstrate inspection control can result in non-compliance, shutdowns, or legal exposure.

When Must ATEX / Ex Equipment Be Inspected?

Before Commissioning (Initial Inspection)

Every hazardous area installation must undergo an initial inspection before energisation.

This inspection confirms:

• Correct equipment selection for the zone

  Correct protection type

• Proper cable glands and sealing methods

• Effective earthing and bonding

• No installation damage

• Correct certification markings

No hazardous area installation should be placed into service without this verification.

Periodic Inspections During Operation

After commissioning, equipment must be inspected at risk-based intervals.

Inspection frequency depends on:

• Environmental severity (corrosion, vibration, moisture, dust)

• Process risk level

• Zone classification

• Equipment type

• Maintenance history

• Manufacturer recommendations

Although the law does not prescribe a fixed period, industry best practice in South Africa typically follows:

• Standard industrial environments → Annual inspection

• Harsh or corrosive environments → Every 6–12 months

• High-risk zones (Zone 0 / Zone 20) → Stricter inspection regimes

• Portable Ex equipment → Usually inspected annually

The harsher the environment, the shorter the inspection interval.

After Maintenance, Repairs or Modifications

Re-inspection is mandatory when explosion protection may have been compromised.

Examples include:

• Opening flameproof (Ex d) enclosures

• Replacing glands or cable entries

• Repairing damaged equipment

• Modifying intrinsic safety circuits

• Replacing barriers or IS interfaces

• Mechanical impact damage

Any intervention affecting protection integrity requires verification before returning equipment to service.

After Abnormal or Incident Events

Immediate inspection is required after:

• Explosion incidents

• Fire exposure

• Flooding

• Severe corrosion detection

• Structural damage

• Unauthorised modification

Explosion protection cannot be assumed intact after abnormal conditions.

Types of ATEX/Ex Inspections

Hazardous area inspections are structured according to inspection level:

✔ Visual Inspection

Basic external checks without tools.
Looks for missing bolts, corrosion, broken glands, or obvious damage.

✔ Close Inspection

Requires close access and minor tools.
Checks gland tightness, bonding continuity, seals, and external integrity.

✔ Detailed Inspection

May require opening enclosures (under controlled conditions).
Includes inspection of flamepaths, internal wiring, segregation of IS circuits, and termination integrity.

Higher-risk zones require more detailed inspection programs.

Who Is Qualified to Inspect ATEX Equipment?

Hazardous area inspection is not standard electrical maintenance.

Inspections must be performed by a competent person trained in hazardous area standards, familiar with:

• Protection concepts

• Zone classification principles

• Equipment certification markings

• Hazardous area installation requirements

Using unqualified personnel exposes the duty holder to serious compliance risk.

Documentation: The Most Overlooked Risk

Inspection without documentation equals non-compliance.

A compliant hazardous area management system should include:

• Hazardous area equipment register

• Inspection schedule

• Signed inspection reports

• Defect tracking and corrective action records

• Risk-based inspection interval justification

During Department of Labour inspections or major client audits, documentation is often the first compliance checkpoint.

Key Takeaways

You must inspect ATEX / Ex equipment:

• Before first energisation

• Periodically based on risk

• After repairs or modifications

• After abnormal events

• Whenever protection integrity is uncertain

If you cannot prove inspection control, you cannot prove compliance.