BS EN 12492-2012 pdf download.Mountaineering equipment – Helmets for mountaineers -Safety requirements and test method.
4 Requirements
4.1 Construction requirements
4.1.1 Mei-taIs
For those p1s of the hebnet tt cane Into contact witti the skin, materials wch are known to be likely to caise skn rnton or iy adverse effect on health shall not be used. For a material not in general use. advfoe as to Its suitabhty shall be sought before its intmduction.
4.12 Pro.ctions
There shal be no sharp edges, roughness or projection on any part of the helmet which is in contact or
potential contact with the wearei-wtien (lie helmet Is worn, such as Is lilcely to cause ury to the wearer.
4.1.3 RetentIon system
The helmet shell be fitted with a retenbon system. inducing a chin strap. The retention system shell have at least ttree separate ports of attachment to the shell The dim strap shall be adjustable in length. That part of the dn str wtlech comes into contad with the jaw sh have a mWmum width of 15 mm under a load of
250 N
4.1.4 Ventilation
All heknels shall be ven[iiated
The sum of the cioss-sectionel areas of such ventilatIon shal not be less thin 4 cm’ when measured on the
sirface of the hene(
4.2 Performance requirements
42.1 Shock absorpton
4.2.1.1 Vertical energy absorption capacity
When a helmet Is tested by the method descnbed ui 5.5. the force transmitted to the headform shall not
eiceed 10 kN. for a thp height o((2 000 110) mm of the hemispherical striker described In 5.5.3,4. 4212 Front energy absorption capacity
When a h&met is tested by the method described ki 5.5, the force transmitted to the headform shall not exceed 10 kN. for a &op height of (500 = 10) mm of the flat sinker described in 5.5.3.4.
4.2.2 Pe,ie4ratton
When a helmet s tested on two ptnts of impact. aparl from each other as at east 50 mm, by the method desaibed Ii 5.6. fliers shah be no contact between the stnker and the headfomi, for a op heqht 01(1 000 5) mm of the COrUC strkei descited ri 5.6.3 4
4.2.3 Rstent)on system strength
When a helmet is tested by the method described in 57, the rnaxwrium elongation of the whole system shal
not exceed 25 mm.
4.2.4 RetentIon system effectiveness (roll oft)
When a hetmet is tested by the method escnbed r’ 5.6. for the front way and roar way tests, the helmet shal not come ofl the headform
5 Test methods
5.1 Sampltng
For every t)pe of helmet helmet samples shal be submitted for testing In the coriditlon in which they are offered for sale. includng any requisite holes in the shel and any means of attachment for accessories speafied by the manufactLrer
No helmet that has been subected k lesti.g shall be offered for sale, Foreverytypeofhefrnet, 11 hekvietsarriples are reqiaredforthe tests (seeTable 1):
— 6 of the smallest s’.ze of the range of the helmet tpe and 5 04 the largest size 04 the range of the helmet type
5.2 Helmet adjustment
Before any testing on a headfom the hehnet shall be a4uictod the heodform size and posioned in accordance with the manacturers enstructons.
The smalest hoadform m the smallest size, fri accordance with 54, whIch ii within the size range specified by the manufacturer for the particular size and type of helmet.
The largest headform is the largest size, in aaordance with 5.4, which is within the siZe range specified by the manufacturer for the parhcular size and type of hetrmet.
5.3.2 U.V. ag.lng
5.32.1 Apparatus
A high pIes.ure eno, 450 Walt lamp with quartz cas4ng, operated In accordance with the lamp manufacturers instructions.
A means or1 the helmet so that at as exposed to the radiation
5.32.2 Procedure
Secure the hiiet so that the vertial axas tbvugh the crown cI the helmet (as worn) is perpendicuLar to the axis c the lamp and the distance between (tie cown of the helmet and the axis of the lamp Is (150±5) mm. Expose the helmet to the radiation for (400 ± 4) h. It shal then be removed and allowed to return to laboratory
ambient conditions.
NOTE Tha method dnscrted in Aiviax A may be used as arm altecnive
5.3.3 Thermal plus’ conditioning
The helmet shall be exposed to a temperature of (35 ±2) C f between 4 h and 24 h.
5.34 Th.rmal minus’ conditioning
The helmet shaft be exposed to a temperature of (-20±2) C for between 4 h and 24 h.
5.4 Headforms
The head fomis used shall comply with EN 9602006 The sizes in Table 2 shall be used, except for doomimation c shodm. absorbing capacity. BS EN 12492-2012 pdf download.
BS EN 12492-2012 pdf download
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