BS EN 14325:2018 pdf free.Protective clothing against chemicals – Test methodsand performance classification of chemical protectiveclothing materials, seams, joins and assemblages.
BS EN 14325 A number of performance classification levels are identified for the various properties of materials to befound in this standard.
The value of each property defined in 4.4 to 4.15 and which shall be used for performance classification,shall be determined in accordance with AnnexC including the calculation of uncertainty ofmeasurement for all the results.
lf not specified otherwise within 4.4,4.5,4.6,4.7,4.9 or within the specific test method itself, a materialwith different behaviour in the length and cross directions, shall be tested for its performance in bothdirections. The performance classification shall be based on the results obtained for the directionresulting in the lower performance classification when evaluated according to Annex C.
For a material with different surface characteristics, the fabric side that will appear on the outside of theapparel shall be tested for all test methods that are linked to surface performance (i.e.4.4,4.5,4.6,4.84.11,4.12,4.13,4.14,4.15,) and the performance classification shall be based on the results for this side.lf the chemical protective clothing consists of multiple layers of materials, with or without separablelayers, all layers shall be tested together with the chemical protective clothing outer surface beingtested for those properties which are linked to surface performance.
For materials,which require pre-treatment, the performance classification shall be based on the lowestperformance classification obtained on either testing new (not pre-treated) and/or pre-treatedmaterials based on evidence.The performance classification tests shall be performed on the worst case.lIf insufficient evidence is available to determine whether the test shall be performed as new or pre-treated, the test shall be performed in both conditions.
Before each test, all chemical protective clothing material samples,with the exception of limited-usechemical protective clothing, shall undergo pre-treatment by cleaning and disinfection as applicable.lf the manufacturer’s instructions indicate that cleaning or disinfection is not allowed, i.e. limited usegarments, then testing shall be carried out on new material.BS EN 14325 pdf download.