BS EN 343-2003 pdf download.Protective clothing Protection against rain.
This BS EN 343 specifies requirements and test methods applicable to materials and seams of protective clothing against the influence of precipitation (e. g. rain, snowflakes), fog and ground humidity.
The testing of rain prootness of ready made garments is excluded in this standard at this time because a separate test method for such a property is currently being prepared.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 340, Protective clothing — General requirements.
EN 388, Protective gloves against mechanical risks
EN 530:1994, Abrasion resistance of protective clothing material — Test methods.
EN 20811, Textiles – Determination of resistance to water penetration – Hydrostatic pressure test
EN 31092, Textiles – Determination of physiological properties – Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded – hotplate test) (ISO 11092: 1993).
EN ISO 1421, Rubber- or plastics-coated fabrics – Determination of tensile strength and elongation at break
(ISO 1421:1998)
EN ISO 7854:1997. Rubber- or plastics-coated fabrics – Determination of resistance to damage by flexing (ISO 7854:1995)
EN ISO 13934-1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force and elongation at maximum force using the strip method (ISO 13934-1:1999).
EN ISO 13935-2, Textiles — Tensile properties of fabncs – Part 2: Determination of maximum force using the grab method (ISO 13934-2:1999)
ISO 1817, Rubber, vulcanized — Determination of the effect of liquids.
ISO 4674:1977, Fabrics coated with rubber or plastics — Determination of tear resistance.
3 Terms and definitions
For the purposes of this European Standard, the foHowing terms and definitions apply:
in2 p€,
water vapour resistance R,
water vapour pressure difference between the two faces of a material divided by the resultant evaporative heat flux per unit area in the direction of the gradient. The evaporative heat flux may consist of both diffusive and convective components
Water vapour resistance R.. expressed in square metres pascal per watt, is a quantity specific to textile materials or composites which determines the tatenr evaporative heat flux across a given area in response to a steady applied water vapour pressure gradient.
3.2
water penetration resistance bfl [Pal
hydrostatic pressure supported by a material is a measure of the opposition to the passage of water through the material
3.3
outer shell material
outermost material of which the protective clothing is made
3.4
insert with a watertight property
3.5
thermal liner
layer with a watertight property providing additional thermal insulation
3.6
lining
innermost material without watertight property.
4 Performance requirements
4.1 General
The ergonomic requirements of EN 340 shall be applied. The components of the garment (see also annex C)
are tested in accordance with the following requirements. The application of the single tests to each component
is shown in Table 1.
4.4 Tensile strength of the outer shell material
When tested in accordance with 5.3, the outer shell material shall withstand a minimum tensile force of 450 N in both orthogonal directions of the material. For materials with an elongation of more than 50 % this requirement is not applicable
4.5 Tear resistance of the outer shell material
When tested in accordance with 5.4 the outer shell material shall withstand a minimum teanng force of 25 N in both orthogonal directions of the material.
4.6 Dimensional change of the protective clothing
When tested in accordance with 5.5 and as specified in Table 1. the dimensional change of relevant materials in both orthogonal directions shall not exceed ± 3 % after five washing or dry cleaning cycles.
4.7 Seam strength of the outer shell material
When tested in accordance with 5.6, the seam strength of the outer shell material shall be at least 225 N. For materials with an elongation of more than 50 % this requirement is not applicable.
5 Testing requirements
5.1 Testing of resistance to water penetration
5.1.1 General
Testing of resistance to water penetration, in accordance with EN 20811. with an increase of hydrostatic pressure of (980 ± 50) Pa/min.
5.1.2 Number and size of specimens Number of specimens:
5 specimens for the testing of material before pretreatment;
5 specimens for the testing of the seams before pretreatment;
5 specimens for the testing of material after pretreatment by dry-cleaning and/or washing;
4 specimens for the testing after pretreatment by abrasion;
4 specimens for the testing after pretreatment by repeated flexing. i.e. 2 specimens in production
direction and 2 specimens across the production direction;
4 specimens for the testing after pretreatment by fuel and oil, I e. 2 specimens for testing with fuel and 2
specimens for testing with oil.
Specimens are to be cut off from the layers as specified in Table 1 (see also annex C) and shall have a size of at least 130 mm diameter.
5.1.3 Pretreatments of outer shell mateilal and liner or thermal liner in combination
5.1.3.1 General
Separate samples will be used for each of the following petreatments prior to testing the resistance to water penetration:
5.1.3.2 Dry-cleanIng and/or washing
Number of cycles: five. As far as the care label fixed to the p’otective clothing does not forbid washing, the specimens are subject to a washing procedure in accordance with EN 340 and in accordance with the symbols given on the care label, It in accordance with the care label only dry cleaning is admitted, the specimens are subject to the procedure in accordance with EN 340.
5.1.3.3 Abrasion
Abrasion shall be carried out on the outer face of the outer shell material but with all materials of the clothing assembly combined with any applied water tight layer.BS EN 343-2003 pdf download.