UNI EN ISO 14120 CRASH TEST

UNI EN ISO 14120 CRASH TEST

ISO 14120 Crash test methods applied to Access products with ISO 14120 marking. 
 
Typically, guards carry out two main functions: prevent people from accessing the danger area and containment i.e. prevent emission of machinery parts or liquid spillage, fumes etc. from within the protected area.
In order to validate guards design and construction according to the ISO 14120 standard and their application in situations in which there is the need to prevent access from outside the danger area and/or contain ejections from within the danger area, load tests need to be carried out as per the methods outlined below 
 
Impact strength i.e. resistance to impacts from outside the danger area (annex d2)
 
The basic values for the verification of guards impact strength simulate a human body with a minimum total weight of 90 kilos which inadvertently crashes into the protection guards of a danger zone. The minimum speed of the sample weight must be set at 1.6 m/sec, which means that impact energy will be at least E=115 J.  The test employs the pendulum method as shown in figure 1. 


Impact strength i.e. resistance to impacts from inside the danger area (annex d3)
 
Energy impact tests depend on the machinery itself according to the formulas below: 
 
E = ½ m × V² (C.1) where E represents energy [J] or [Nm]; m represents the mass of the projectile part [kg]; V  represents the projectile speed [m/s].
 
or:

E = m × g × h (C.2) where m represents the mass of the part [90 kg]; g is 9,81 m / s² (constant); h represents the mass fall [m].
 
The energy value is measured shortly before impact and it is conventionally expressed in Joules as a result of the 90 kilo body minimum mass impacting as shown in figure 1. 
 
Protections are validated and therefore CE certified even in presence of permanent deformations provided that there isno penetration or total break of support brackets.

  

Access guards are fitted with 14120 captive screw kits which have passed all tests and can resist to impacts both from the outside and the inside of the danger area up to 2500 Joules.

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