BS EN 374-2-2003 pdf download.Protective gloves against chemicals and micro-organisms Part 2: Determination of resistance to penetration.
This BS EN 374-2 specifies a test method for the penetration resistance of gloves that protect against chemicals andlor micro-organisms.
At this time it is believed that gloves which resist penetration, when tested according to this Part of EN 374, will form an effective barrier to micro-biological hazards.
2 PrInciple of tests
Air leak test:
A glove is immersed in water, and its interior is pressurised with air. A leak is detected by a stream of air bubbles from the surface of the glove.
Water leak test:
A glove is filled with water. A leak is detected by the appearance of water droplets on the outside of the 9lOve.
This air leak procedure is not suitable for all gloves. For example parts of some gloves may be overinflated while other parts of the same gloves can only be partially inflated or not even filled at all with air. lithe air leak test proves unsuitable, then only the water penetration test is carried out.
For both methods disregard leaks within the area of 40 mm from the edge of the liquidproof area.
3 Sampling
For the purpose of type-testing, the test sample will be one glove of each size, with an overall minimum of 4 gloves per performed test.
If one glove fails the penetration test, the glove shall be reported as having failed.
For the purpose of production control, e g by the manufacturer or auditing organisation, see annex A.
4 Apparatus
4.1 Air leak test
4.1.1 A circular fixing mandrel, tapered with an appropriate diameter range to effect an airtight seal with the glove to be tested. It should be capable of rotation through 1800.
4.1.2 Means of air inflation.
4.2 Water leak test
4.2.1 A clear open ended plastic tube is fitted with a hook at the upper end. The tube measures 380 mm in length and has a diameter wide enough to fit the gloves under test. It has a mark 40 mm from the lower end (see figure 3).
4.2.2 Elastic strapping with a touch and close’ fastener or other fastening material.
4.2.3 Stand with horizontal rod for hanging the hook end of the tube (see figure 4). The supported rod shall be capable of taking the weight of the total number of gloves, that will be suspended at any one time.
4.2.4 A device capable of delivering a minimum of 1 000 ml water.
4.2.5 An alternative means of holding the glove may be used. The apparatus shall be capable of securing the glove on a mandrel, with a diameter appropriate to fit the glove, so that it can be filled with water to within 40 mm from the edge of the liquid proof area. It shall be capable of holding water in excess of that required to fill the glove.
5 Procedure
5.1 General
Carefully remove the glove from the wrapper, box or its packaging. Record the identity code, lot number, size and brand of samples. Visually examine for tears, rips and holes. If these are present, the gloves shall be reported as having failed.
5.2 Air leak test
5.2.1 The glove is fastened to the circular mandrel and is inflated after immersion at ambient temperature, with air, to a gauge pressure of X kPa (see table 1) plus an overpressure of 1 kPa per 100 mm of immersion measured at the fingertips. For example, for 250 mm of immersion at the fingertips, 2.5 kPa shall be added to the air pressure specified in table 1.
The inflation pressure shall be reached with a ± 10 % limit deviation within 2 mm and the control of possible air bubbles shall take maximum an additional 30 s.
5.2.2 For gloves up to 250 mm In length the immersion shall be carried out with the hand vertically downwards so that the water covers the maximum possible surface of the glove.
For gloves over 250 mm in length the immersion is to be carried out, with the hand at a downward angle. to a vertical depth of (250 ± 10) mm above the tip of the middle finger and so that the water covers the maximum possible surface of the glove. Rotate the mandrel and examine the whole glove surface for the emergence of air bubbles (see figure 2).
5.3 Water leak test
5.3.1 The glove is attached to open-ended plastic tube by bringing the edge of the cuff to the 40 mm mark (see figure 3) and fastening it with the elastic strap to make a watertight seal.
5.3.2 A minimum of 1 000 ml of water is added through the tube to fill the glove completely and to reach at least the 40 mm mark level of the liquidproof area of the glove. The water shall be at ambient temperature.
NOTE 1 Some of the 1 000 ml of water may remain in the fill tube depending on the glove being tested.
NOTE 2 II it is required, the glove can be supported by some sudable means in order to avoid excessive distortion from the weight of water.
5.3.3 The gloves are examined immediately for waler leaks. The glove should not be squeezed. Only minimal handling is required to detect leaks. Water droplets may be blotted to confirm leakage, or talcum powder may be used to enhance droplet visibility.
5.3.4 If the glove does not leak immediately, the tube with the glove attached is suspended vertically (see figure 4) and re-examined 2 miii after the initial addition of water. Again, using minimum handling, the glove surface is checked for leaks.
6 Test report.BS EN 374-2-2003 pdf download.