PERFORMANCE REQUIREMENTS AND TEST METHODS FOR SHOCK ABSORBING LANYARDS
EN355 RELATES TO LANYARDS INTENDED FOR USE IN CONNECTING THE ATTACHMENT POINT OF A FULL BODY HARNESS TO A SUITABLE ANCHORAGE DEVICE. THE LANYARD INCLUDES A SHOCK ABSORBING ELEMENT, INTENDED TO REDUCE THE FORCE APPLIED TO THE USER BY GRADUALLY ARRESTING THE FALL.
THERE ARE 3 MAIN PERFORMANCE TESTS IN EN355
Shock-absorbing lanyards are put through a drop test to see how well they can stop a fall within a certain distance while keeping the force at a safe level. Following a fall with a minimum solid mass of 100 kg dropped over a distance twice the length of the lanyard, the lanyard should not deploy (stretch, open, tear) beyond a maximum length of 1.75 metres, with a maximum force of 6 kN.
When energy absorbers are meant to be sold separately from the lanyard (as a component), the chain is expanded to a length of 2 metres, and the mass is dropped over a distance of 4 metres.
Tensile testing is performed on the entire product. A tensile force of 15 kN is applied to energy absorbers. To demonstrate that the product's breaking strength exceeds the force specified by the standard, tensile pressures are applied and held for at least 3 minutes.
A neutral salt-spray testing is performed on metallic components used in fall prevention devices to establish a minimum resistance to environmental corrosion (specifically rust). Products are kept in a sealed chamber that is filled with a salt-water mist that might cause rust on exposed metals.After 24- or 48-hours of exposure, the products are inspected for corrosion and functionality.
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