This standard relates to industrial protective helmets that are designed to protect a stationary user from falling dangers. To meet this standard, a helmet must undergo a series of impact tests using a fixed head-form and a falling weight.
THERE ARE FOUR COMPULSORY ELEMENTS TO EN397
After a fall of a 5kg weight from a 1-meter height, the helmet must not allow more than 5Kn of energy to distribute to the head. This test is carried out at both +50°C and -10°C room conditions.
The tip of the test mass used (3 kg from 1m height) must notcome into contact withthe skull. This test is performed at room temperatures of +50°C and –10°C.
The helmet is exposed to aflame,and it must not burn with flame emission more than 5 seconds after removal of the flame source.
Helmets can only protect when retained on the head. EN 397 requires that either the helmet shell or the headband is fitted with a chinstrap or with the means of attaching one,i.e.,anchorage points. Chin strap (where present) shall be released at a force between 15kg e 25kg (150N -250N) – due to failure of the anchorages only. Test conducted at +50°C after the helmet being submitted to penetration test.
CHECK YOUR DATES
In accordance with EN 397, marking of the helmet should include the year and quarter of manufacture. Period of obsolescence of the helmet and its components must be declared on the User Sheet which is delivered together with the helmet.