Brochure 2023 V2 online - Flipbook - Page 22
HELMET PROTECTION STANDARDS
EN 397
(Type 1) Minimum performance requirements for protective helmets that reduce the forces of impact and penetration and that may provide protection from electric
shock. Type 1 helmets are intended to reduce the force of impact resulting from a blow only to the top of the head.
MANDATORY TESTS
ANSI Z89.1
Helmets for general use in construction and industry to provide protection to the wearer against falling objects and consequential brain injury and/or skull fracture.
Shock Absorption
EN 397
ANSI Z89.1
Drop height
1 metre
1.2 metre (freefall)
Maximum force allowed
5 kiloNewtons
3.78 kiloNewtons (average)
4.45 kiloNewtons (individual)
Energy Transmitted during test
49 joules
53 joules
Striker face and weight
50mm radius hemispherical, 5kg
95mm diameter, radius 48mm, 3.6kg
Test Conditions
-10°C, +50°C, Wet at +20°C, plus UV
-18°C, +49°C, Wet at +23°C
Penetration Resistance
EN 397
ANSI Z89.1
Drop height
1 metre on area 50mm radius
2.5 metres on area 38mm
radius on crown
Energy Transmitted during test
29 joules
24.5 joules
Striker Mass
3kg
1kg
Test Conditions
-10°C, +50°C, Wet at +20°C, plus UV
-18°C, +49°C, Wet at +23°C
BSI Kitemark
By purchasing a product accredited with the BSI
Kitemark, the user can be confident that the product
continually meets the performance characteristics
of the initial sample submitted for type approval.
BSI independently audit test the product on a regular basis and
in order for us to retain the Kitemark, we must routinely batch
test products in our own laboratory and have process control
procedures in place within our production.
Centurion also hold BS EN ISO 9001:2015, a quality
management standard, covering the design management,
development and manufacture of our products, having held
ISO 9001 since 1992.
Lateral Deformation (LD)
Provides a level of protection against lateral compression, indicating improved side strength of helmet.
Test Method: A pressure of 43kg is applied on both sides of the shell for 5 minutes and then the amount of helmet deformation is measured.
EN 397 only
Low Temperature Performance
Helmet will still provide protection when worn at or above this temperature.
Test Method: The mandatory shock absorption and penetration resistance tests are repeated at stated low temperatures.
-20°C/-30°C - EN 397
-30°C - ANSI Z89.1
OPTIONAL TESTS
Electrical Insulation
Test indicates protection from electrical shock.
EN Test Method: The shell is immersed for 24 hours in 3 grams per litre of salt water. A current is passed through electrodes which are
positioned both inside and outside the helmet. The maximum electrical leakage allowed is 1.2mA for 30 secs at 1200V a.c.
ANSI Test Method: Test samples shall be proof-tested at indicated voltage (phase to ground).
440V a.c. - EN 397, 2200V a.c. - Class
G ANSI Z89.1, 20,000V a.c. - Class E
ANSI Z89.1
Molten Metal (MM)
The test ensures that there is no penetration of molten metal splash, indicating a quality, heat resistant shell.
Test Method: Test procedure is 150g of molten iron dropped onto a 50mm radius area on helmet crown.
EN 397 only
Extra Features outside the scope of EN 397
Purpose and test method is as per the relevant EN 397 options detailed above, but performance indicates a higher level of protection.
-40°C and 1000V a.c.
Resistant to Flame (F)
Test ensures helmet does not ignite or burn after a 昀氀ame is applied for a brief period of time.
EN 397 Test Method: The end of the 昀氀ame is applied to the outside of the cap, 50-100mm from the crown for 10 seconds.
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For full product information please visit: www.centurionsafety.co.uk
Mandatory test for EN 397 (昀氀ame
resistant test) and ANSI Z89.1
(昀氀ammability test)