Hard Hat Lifespan & Date Codes

Date: 10.10.2026 18:20

Safety helmet lifespan, how to read the manufacturing date, the red dot on 3M helmets (Uvicator sensor), reasons for replacement, storage and EN 397 markings, with guidance from 3M, Delta Plus, JSP, uvex and MSA.

Contents

1. What do the regulations and the standard say?
2. Service life by brand
3. How to read the date of manufacture
4. What is the red dot on a 3M hard hat? (Uvicator)
5. When should a hard hat be replaced immediately?
6. Storage and care
7. TS EN 397 markings and additional tests
FAQ

Short answer

In Türkiye there is no single legal service life for a safety helmet. The TS EN 397 standard does not set a fixed number of years; according to the PPE portal of the Ministry of Labour and Social Security (ÇSGB), the manufacturer states the expiry date or service life. Depending on material and model, manufacturers' declarations range from 2–5 years from first use to 5–10 years from the date of manufacture. A hard hat that has taken an impact, is cracked, or has been exposed to chemicals or an electric shock must be replaced immediately, regardless of its age.

1. What do the regulations and the standard say?

The PPE Support Portal of the ÇSGB Directorate General of Occupational Health and Safety states that helmet manufacturers are required to supply, in Turkish with every helmet, "information on the expiry date or service life of the helmet and its parts". According to the same page, "the shelf life and service life specified by the manufacturer must be taken into account when using helmets."

The PPE Regulation in Türkiye also requires periods of use to be determined according to the level of risk, frequency of exposure, the characteristics of the workplace and the performance of the equipment (Art. 6/1-c). In other words, the correct answer is always written in the user instructions for your helmet.

2. Service life by brand

The values below are taken from the manufacturers' own technical documents. "From manufacture" and "from first use" are two separate clocks; many manufacturers apply both and go by whichever runs out first.

Brand / model	Manufacturer's declaration	Note
3M Peltor G3000	Up to 5 years from the date of manufacture (indicative)	Replace earlier if the Uvicator sensor turns white
Delta Plus Quartz Up IV (PP)	2–3 years from first use or 5 years from manufacture	User instructions, 27.11.2023
Delta Plus Granite Wind (ABS)	48 months from first use, 84 months from manufacture	Delta Plus product page
Delta Plus general	ABS helmets 7 years; polypropylene (PP) and high-density polyethylene (HDPE) helmets 5 years	Under optimum conditions of use
JSP	Up to 5 years in storage unused; 5 years from first use or 10 years from manufacture (whichever comes first)	Typical use in harsh conditions: 6 months–2 years
uvex pheos / airwing	Up to 4 years' storage before first use + 4 years from first use	The date of first use should be recorded
MSA V-Gard (USA, ANSI)	Shell no more than 5 years, harness no more than 12 months (from entry into service)	US market instructions
Karam	Shelf life of up to 5 years for a helmet stored under ideal conditions	General FAQ statement; check the instructions for the specific model

Our

head protection range includes the 3M and Delta Plus models listed above. For Karam and other brands, check the user instructions supplied with the product for the model-specific service life; if you don't have them, ask us.

3. How to read the date of manufacture

The year and quarter of manufacture are among the mandatory markings under TS EN 397. The date is usually found under the peak or inside the shell, as a moulded "clock" or a label:

JSP: The numbers on the outer ring indicate the month (shown by the arrow), and the two digits in the centre indicate the year.
Delta Plus: The year is inside a circle and the month is at the tip of an arrow. On dot-type markings, the row of the last marked dot gives the year and the column gives the month.
MSA: The date code under the visor is the shell's production (moulding) date, not the date it was first put into service.
uvex: The "01/0000" format means month/year of manufacture.

Tip: Because service life is also counted from first use, write the date on the safety helmet when it is issued to the worker.

Our PPE issue record tool includes a "Note / replacement" field for this.

4. What is the red dot on a 3M hard hat? (Uvicator)

The red disc on the 3M G3000 series is a UV sensor called Uvicator. According to 3M, as the hard hat is exposed to sunlight, the disc turns clockwise from red to white depending on the amount of UV received; when the disc has turned completely white, the hard hat has reached the maximum UV exposure it can take and must be replaced. Do not stick any labels over the disc, otherwise the sensor cannot work.

Uvicator only indicates sun (UV) ageing. Physical and chemical damage must be checked separately; a hard hat that is cracked or has taken an impact must not be used, even if the disc is still red.

5. When should a hard hat be replaced immediately?

After a heavy impact, electric shock, workplace accident or chemical exposure (ÇSGB, Turkish Ministry of Labour and Social Security).
If the shell shows cracks, dents or noticeable wear.
If the shelf life or service life stated by the manufacturer has expired.
If the 3M Uvicator disc has turned completely white.

6. Storage and care

Store in a cool, dark place out of direct sunlight (ÇSGB). For the 3M G3000, the recommended storage conditions are +3 °C to +40 °C and humidity below 85%; JSP and uvex recommend 20 ± 15 °C.
Clean regularly with lukewarm water and a mild detergent.
Unless permitted by the manufacturer, do not use paint, solvents, adhesives or sticky labels, and do not replace original parts.

7. TS EN 397 markings and additional tests

Marking	Meaning
EN 397	Standard number
Manufacturer's name / mark	Mandatory
Year and quarter of manufacture	Mandatory (date clock)
Type and size range	Mandatory; the type is marked on both the shell and the harness
ABS, PC, HDPE…	Abbreviation of the shell material
-20 °C / -30 °C	Very low temperature (optional test)
+150 °C	Very high temperature (optional)
440 Vac	Insulation against brief, accidental contact with 440 V alternating current (optional); ventilated shells cannot pass this test
LD	Lateral deformation (optional)
MM	Molten metal splash (optional)

If high-voltage insulation is required for electrical work, check for certification to the separate standard EN 50365 (double triangle symbol). Check the certification of the electricians' hard hats on our site on each product page.

New edition:EN 397:2025 is replacing EN 397:2012+A1:2012. The new edition introduces a distinction between Type 1 and Type 2, removes the 440 V option and leaves electrical insulation to EN 50365:2023. Products with existing certificates may still be placed on the market for the validity period of their certificates. The replacement time for a hard hat already in use is still determined by the service life stated by the manufacturer.

FAQ

What is the shelf life of a hard hat?

There is no single legal period. According to manufacturers' declarations, unused storage life is 4–5 years (JSP and Karam a maximum of 5 years, uvex 4 years). The service life after first use is added to the storage period; many manufacturers also set an overall upper limit counted from the date of manufacture.

What is the red dot on a 3M hard hat?

It is 3M's Uvicator UV sensor. It turns from red to white with exposure to sunlight; once it has turned completely white, the hard hat should be replaced.

Who wears a white hard hat?

We found no rule in Turkish legislation linking hard hat colour to job role; colours are a workplace or site convention and vary even between manufacturers. uvex states that on large construction sites white is used for visitors or architects, and red for supervisors, foremen or electricians. Karam, on the other hand, recommends white for site managers, engineers and inspectors, and red for fire wardens. Follow your workplace's colour policy.

When should the hard hat harness (suspension) be replaced?

We found no separate replacement period in years for the harness in European manufacturers' user instructions. MSA's US user instructions recommend replacing the suspension at least every 12 months. The harness should be replaced when worn, or within the period stated in the user instructions.