Head injuries in the workplace are severe and preventable. Under South Africa’s Occupational Health and Safety Act (OHS Act 85 of 1993), employers have a legal obligation to supply appropriate head protection to every worker where a head injury risk exists — and that protection must meet SANS 1397, the South African national standard for industrial safety helmets.
This guide covers what SANS 1397 requires, where hard hats are compulsory, how to inspect and maintain them, and how to choose the right helmet for your site.
What Is SANS 1397?
SANS 1397 is the South African National Standard for industrial safety helmets (hard hats). It is the South African equivalent of the European standard EN 397, and specifies the performance requirements that a compliant industrial helmet must meet:
- Impact resistance: Withstand a 5kg hemispherical striker dropped from 1 metre, with peak transmitted force not exceeding 5kN
- Penetration resistance: Resist penetration from a sharp object dropped from height
- Chin strap retention: Have an attachment point that releases under a load of 150N–250N (prevents the helmet becoming a strangulation hazard)
- Suspension system: Keep the inner shell at least 25mm from the wearer’s head, distributing impact energy across the suspension
- UV stability: Maintain performance after UV exposure — relevant for South African outdoor worksites
Hard hats that meet SANS 1397 (or the equivalent EN 397 / ISO 3873) carry a marking on the inside of the shell. This marking is what OHS Act inspectors check.
Where Are Hard Hats Compulsory?
The OHS Act General Safety Regulations and the Construction Regulations 2014 make hard hats compulsory in any work area where there is a risk of:
- Falling objects from height (construction scaffolding, racking in warehouses, overhead work)
- Contact with fixed overhead structures (low beams, machinery)
- Electrical hazards from overhead power lines or electrical installations
Compulsory hard hat environments:
- All construction sites (mandatory under Construction Regulations 2014)
- Mines and quarries
- Warehouses with overhead storage or active forklift operations
- Manufacturing plants with overhead cranes or conveyors
- Electrical installation and maintenance work
The Hard Hat Colour Code
South African construction and industrial sites use a colour-coded hard hat system to indicate worker roles and site access levels at a glance:
| Colour | Typical Role |
|---|---|
| White | Site managers, foremen, engineers, supervisors, visitors |
| Yellow | General labourers and earth-moving plant operators |
| Orange | Road construction and traffic management workers |
| Blue | Technical workers — electricians, carpenters, plumbers |
| Green | Safety officers and SHE representatives |
| Red | Fire wardens |
| Brown | Welders and workers in high-heat environments |
| Pink | Visitor / temporary site access |
The colour code is not legally mandated under SANS 1397 — it is a site-specific convention. Always check the site safety plan for the correct colour allocation.
When to Replace a Hard Hat
SANS 1397 hard hats have a defined service life.
Mandatory replacement timelines:
- Shell: Replace every 5 years from the date of manufacture (stamped inside the shell), regardless of condition
- Suspension: Replace every 3 years or when visible wear, cracking, or deformation is present
- After any impact: Replace the helmet immediately, even if no visible damage is present — the impact energy may have compromised the shell’s structural integrity in ways that are not visible externally
Pre-use inspection checklist:
Before fitting a hard hat, check for:
- Cracks, splits, or dents in the shell (especially around the brim)
- Faded or chalky surface (UV degradation — the shell becomes brittle)
- Damaged, frayed, or discoloured suspension straps
- Missing or broken suspension anchoring points
- Manufacture date stamp still legible and within service life
A hard hat that fails any of these checks must not be worn. Provide a replacement immediately.
Electrical Hard Hats: Class E vs Class G
Standard SANS 1397 helmets are not rated for electrical protection. For workers exposed to overhead electrical conductors or live electrical installations, an electrically-rated helmet is required:
- Class E (Electrical): Tested to 20,000 volts — required for high-voltage electrical work
- Class G (General): Tested to 2,200 volts — suitable for low-voltage electrical environments
Electrically-rated helmets carry additional markings inside the shell indicating the class rating. Standard site hard hats do not carry this rating.
Hard Hat Class Comparison
South Africa follows SANS 1397 (equivalent to EN 397 and ISO 3873). The standard covers an unrated class for general impact protection and two electrical protection classes. The table below summarises the classifications applicable to South African worksites, including the voltage ratings and typical applications for each.
| Class | Protection Level | Typical Use | Voltage Rating |
|---|---|---|---|
| Standard (Unrated) | Basic impact and penetration resistance per SANS 1397 — no electrical protection | Construction sites, warehouses, manufacturing, and general industry where no live electrical hazard is present | Not rated |
| Class G (General) | Full SANS 1397 impact protection plus low-voltage electrical insulation | Electrical maintenance in low-voltage environments, general industrial electrical work and panel servicing | Tested to 2,200 V |
| Class E (Electrical) | Full SANS 1397 impact protection plus high-voltage electrical insulation | High-voltage electrical installation, transmission line work, substation and switchgear maintenance | Tested to 20,000 V |
Common Hard Hat Compliance Failures
During OHS Act inspections, the most common hard hat non-compliance findings:
- No helmet in a mandatory zone — worker on scaffolding without head protection
- Shell past its replacement date — manufacture date shows 5+ years ago
- Damaged suspension — suspension straps torn or missing
- Wrong type for the hazard — standard hard hat used in a high-voltage electrical environment
- No inspection record — employer cannot demonstrate pre-use checks are being conducted
Frequently Asked Questions
What standard governs hard hats in South Africa?▼
Hard hats in South Africa must comply with SANS 1397, the South African National Standard for industrial safety helmets. SANS 1397 is equivalent to the European EN 397 and international ISO 3873 standards, covering impact resistance, penetration resistance, suspension performance, chin strap retention, and UV stability. Hard hats bearing the EN 397 or ISO 3873 marking are accepted as compliant on South African sites, provided the certification is current and visible inside the shell.
How often must a hard hat be replaced under South African law?▼
The shell must be replaced every 5 years from the manufacture date stamped inside the shell, regardless of apparent condition. The suspension must be replaced every 3 years, or sooner if wear, cracking, or deformation is present. Any helmet that has absorbed a significant impact — from a drop or from a falling object — must be replaced immediately, as structural damage may not be externally detectable.
Can I use a hard hat that has been dropped or impacted?▼
No. A hard hat that has absorbed any significant impact must be taken out of service and replaced immediately, regardless of visible condition. Impact energy can compromise the shell’s structural integrity in ways that are invisible externally. Continuing to use an impacted helmet exposes the worker to a substantially higher risk of serious head injury in any subsequent incident — even a relatively minor one.
What is the difference between Class A and Class B hard hats?▼
Class A and Class B are American classifications from the ANSI/ISEA Z89.1 standard, which does not govern South African worksites. South Africa uses SANS 1397 (equivalent to EN 397), which classifies electrically-rated helmets as Class G (General, tested to 2,200 V) and Class E (Electrical, tested to 20,000 V). If you import ANSI-rated helmets, verify that they also carry SANS 1397 or EN 397 certification before permitting use on South African sites.
Are bump caps acceptable as hard hat alternatives on South African construction sites?▼
No. Bump caps are not compliant alternatives to SANS 1397 hard hats in any environment where falling objects or overhead impact hazards are present. Bump caps are designed only to protect the wearer against minor contact with fixed surfaces and provide no impact resistance against falling objects and no electrical protection. Using a bump cap in a mandatory hard hat zone is a direct contravention of the OHS Act General Safety Regulations.
How do I know if a hard hat is SANS 1397 compliant?▼
Check the inside of the shell for the certification markings. A compliant SANS 1397 helmet must display the standard number (SANS 1397, EN 397, or ISO 3873), the manufacturer’s name or trademark, the shell size or size range, and the year and quarter of manufacture. Electrically-rated helmets must additionally show the class marking (G or E). If any marking is absent or illegible, the helmet cannot be verified as compliant and must be removed from service.
Where can I buy SANS 1397 compliant hard hats in Johannesburg?▼
Dimple Safety stocks SANS 1397-compliant hard hats — standard and vented versions in all site colours — at our warehouse at 22 Fraser Street, Booysens, Johannesburg. Same-day collection is available for in-stock items. Bulk site supply quotes can be requested online at dimplesafety.co.za or via WhatsApp at +27 61 582 8943.
Where to Buy SANS 1397 Hard Hats in South Africa
Dimple Safety stocks SANS 1397-compliant hard hats at our Booysens, Johannesburg warehouse — standard and vented versions, available in all site colours. Same-day collection from Booysens. Quote requests for bulk site supply accepted online.
📞 WhatsApp your request: wa.me/27615828943
🌐 dimplesafety.co.za | 📍 22 Fraser Street, Booysens, Johannesburg
Also see: PPE Requirements Under the OHS Act: What South African Employers Must Provide
