REVIEW prEN 1621-2:2012: a back protection device is added
A state permitting clear perception and understanding; the area that may be seen distinctly or resolved into a clear image.

REVIEW prEN 1621-2:2012: a back protection device is added

We would like to inform you that substantial technical changes will be included in review prEN 1621-2:2012 regarding the European standard about protective clothing against mechanical impact Part 2: Back protectors – Requirements and test methods.

Besides the classical back protectors and lumbar protectors provided for by EN 1621-2.2003, a new device for the protection of the central part of the back has been added.

Therefore, the protection devices will be identified as follows:

  • FB: Full Back Protector – Protective device which, once worn, aims at reducing the seriousness of lesions caused by impacts in the central part of the back and in the shoulder blades area;
  • CB: Central Back Protector – Protective device which, once worn, aims at reducing the seriousness of lesions caused by impacts in the central part of the back;
  • LB: Lower Back Protector – Protective device which, once worn, aims at reducing the seriousness of lesions caused by impacts in the lumbar part;

As in current EN 1621-2.2003 two performance levels against impact are provided for.

Level 1 (medium peak strength <18kN and single value <24kN) and level 2 (medium peak strength <9kN and single value <12kN).

Level 2 protectors offer higher protection than level 1 protectors but may be heavier and have restrictions to their use.

Between the two standards there is a difference in the number of samples which must undergo the impact test and conditioning.

EN 1621-2.2003 (Clause 6.1) provided for the test on 3 samples, 1 of the smallest size, 1 of the medium size, and 1 of the largest size, which must be conditioned at room temperature (Clause 6.2).

A minimum of 5 impacts (Clause 6.5) evenly distributed on the protectors had to be performed.

The impact centres had to be at a distance of 90 mm: the first at (40 ± 5)mm from the border line of the protection area, the second at (60 ± 5)mm from the border line, the third in the centre of the protection area and another two in the most delicate areas.

On the contrary, in compliance with prEN 1621-2:2012 (Clause 5.1.3) the following tests are compulsory:

–          For the impact test on a device conditioned at room temperature (Clause 5.1.6.1), and differently from Clause 6.2 of EN 1621-2.2003: 1 for each size (2 samples in case of one-size products);

–          For the impact test on a device conditioned at high humidity after hydrolythic ageing (Clause 5.1.6.2): 1 in the middle size on the size range;

OPTIONAL TESTS:

–          For the impact test on a device conditioned at high temperature (Clause 5.1.6.3): 1 in the middle size of the size range;

–          For the impact test on a device conditioned at low temperature (Clause 5.1.6.4): 1 in the middle size in the size range;

The impacts to be performed on each sample by using the equipment described at point 5.1.1 are 5: 3 impacts distributed randomly on the test surface and 2 impacts on weak points identified visually (if there are more than two critical points, choose the worst).

The distance between the impact centres must be of over 50 mm, with the impact centre at a distance of at least 10 mm from the perimeter of the test area, and with the centre of the longitudinal anvil at a minimum distance of 45 mm from the test perimeter.

When the protector is tested in compliance with points 5.1.6.1 (room temperature impact test), 5.1.6.2 (wet impact test) and, if necessary, 5.1.6.3 (high temperature impact test) and/or 5.1.6.4 (low temperature impact test), the performance level of the protector is determined by the worst result of the average values obtained in each of the four test conditions.

 

dolomiticerteng -

Leave a Reply