BS EN 13034: 2005 – Type 6 Protective Clothing [英]

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<P>BS EN 13034: 2005 – Type 6 Protective Clothing </P>
<P>Protective clothing against liquid chemicals Performance requirements for chemical protective clothing offering limited protective performance against liquid chemicals (type 6 and type PB [6] equipment) <I>&amp;#</I>8226; Products must comply with EN340: 2003 This standard sets out the general requirements for protective clothing i.e. materials shall not be known to cause skin irritation or have any adverse effect to health. This also details garment sizing, labelling etc. </P>
<P>● Test Requirements for Materials (fabric) Materials for Type 6 clothing are tested for the following properties; EN14325: 2004 details the test methods &amp; performance classification of chemical protection clothing materials, seams, joins and assemblages. Clause in EN 14325: 2004 Performance requirement 4.4 EN530 Abrasion 4.7 EN ISO 9073-4 Trapezoidal tear resistance 4.9 EN ISO 13934-1 Tensile Strength 4.10 EN863 Puncture Resistance 4.11 EN374-3 or EN ISO 6529 Resistance to permeation by chemicals (replaced EN369) 4.12 EN368* Repellency to liquids 4.13 EN368* Resistance to penetration by liquids 4.14 EN 13274-4 Resistance to ignition (replaced ISO 6941) EN368 has been replaced by ISO 6530:2005, although it has not yet been harmonised with the European norms Test requirements for seams, joins &amp; assemblages of Type 6 protective clothing Seams should be constructed to minimise of prevent penetration of liquid through stitch holes or other components of a seam. Seam strength is determined and classified in accordance with EN14325:2004, Clause 5.5 and must obtain at least Class 1 (&gt;30N). The test method specified in clause 5.5 is EN ISO 13935-2 BS EN368: 1993 - “Gutter Test” - Protective clothing. Protection against liquid chemicals. Test method: resistance of materials to penetration by liquids Liquid chemical penetration is a physical process whereby a liquid penetrates a fabric by passing through pores or holes in the fabric. The European standard EN368 (often referred to as the gutter test) measures liquid penetration through a fabric and liquid repellency by a fabric. Table B shows the standard chemicals used for penetration and repellency testing according to EN368; Table B Chemical Concentration weight (%) Temperature of chemical oc (+/- 2oc) Sulphuric Acid 30 (aqueous) 20 Sodium Hydroxide 10 (aqueous) 20 0-Xylene Undiluted 20 Butan-1-ol Undiluted 20 The test is performed by placing the fabric to be tested in a gutter, inclined at 45o, which is lined with an absorbent fabric; 10ml of the pre-determined liquid chemical is then poured in within 10 seconds on to the top of the test fabric via a nozzle. When testing in accordance with EN368 for repellence to liquid chemicals the material is classified according to the Table C for each chemical tested; Table C Class Repellency Index 3 &gt; 95% 2 &gt; 90% 1 &gt; 80% For liquid repellence a performance level of 3 shall be obtained for at least one of the chemicals listed in table B Any liquid which penetrates the fabric within 1 minute is expressed as a percentage (%) of the original quantity poured onto the fabric. The volume of liquid collected in the detector beaker (positioned at the bottom of the gutter) is also expressed as a percentage (%) of the original quantity. This measures the repellence of the fabric. When testing in accordance with EN368 for resistance to penetration by liquid chemicals the material is classified according to Table D for each chemical tested; Table D Class Penetration Index 3 &lt; 1% 2 &lt; 5% 1 &lt; 10% For resistance to penetration by liquids a performance level of at least 2 shall be obtained for at least one of the chemicals listed in table B Caution must be applied when interpreting penetration results according to EN368 as it only simulates exposure to small amounts of chemicals (10ml) for 1 minute. Diagram showing EN368 “Gutter” test EN468: 1995 – “Spray Test” – Determination of resistance to penetration by spray As with Type 4 clothing, Type 6 suits must pass a “Spray Test” in accordance with EN468: 1995 However, as Type 6 clothing is designed for garments which provide resistance to light “reduced spray” a modified version of EN468 is used. The modifications ensure that only about 10% of the liquid sprayed is loaded onto the suit, compared to the full level spray test of EN468 for Type 4 clothing. When tested in accordance with EN468 using these modifications all chemical protective suits must pass the test. I.e. the total stain area on the undergarment shall be less than or equal to three times the calibrated stain. 来源：STC 李昊鹏</P>