Polyco - Explanation of Standards

Laboratory Tests

EN407 Protective Gloves Against Thermal Risks

Burning Behaviour is tested according to EN ISO 6941 with the glove mounted and tested vertically. A flame is placed directly below and in line with the glove at an angle of 30 ° and a distance of 20mm. The glove is tested for each ignition time i.e. 3 seconds and 15 seconds. The flame time and after glow time for each performance level is as follows: Contact Heat is tested according to EN702. Samples are taken from the palm area and placed in contact with a cylinder of the appropriate temperature. To gain the relevant performance level, the temperature of the inside of the glove cannot rise by more than 10 ° C within the threshold time. Convective Heat is tested according to EN367 : 1992. Samples are subjected to the incident heat from a flame, and the heat passing through to the inside of the glove is measured. The time to record a temperature rise of 24 ° C is the Heat Transfer Index (HTI). Radiant Heat is tested according to EN ISO 6942 : 2002. The sample is exposed to radiant heat density of 20kW/m 2 and the time taken for the temperature on the inside of the glove to rise 24 ° C gives the performance level. Resistance to small splashes of molten metal is tested according to EN348 : 1992. Molten drops from a metal rod melted by exposing the rod to a flame are allowed to fall on the sample. The number of drops required to raise the temperature on the inside of the glove by 40 ° C gives the performance level. Resistance to large splashes of molten metal is tested according to EN373 : 1993. A quantity of molten iron is poured onto the sample, which has a PVC film mounted behind the sample. This film must not show any changes to the surface (such as discrete spots or damage) when the sample is exposed to the quantity of molten iron as shown in the table opposite. Convective Cold is tested by measuring the power required to maintain a constant temperature on a heated full-scale hand model in the ambient atmosphere of a climatic room which provides uniform conditions. The hand model is typically heated to 30-35 ° C. The resultant thermal insulation (ITR) is calculated using the hand model temperature, climatic room temperature and the power consumption of the heated hand to maintain a constant temperature. Contact Cold is tested according to ISO 5085-1 : 1989. The Thermal Resistance (R) is calculated by placing the sample on top of a heated plate with another metal plate (cold plate) placed on top of the sample. This is placed inside a cabinet which has an extractor fan to draw air past the assembly which has a cooling effect on the cold plate. The temperature gradient either side of the sample is measured and compared with the temperature gradient either side of a reference standard. The Thermal Insulation is calculated from the known thermal resistance of the standard and the measured temperature gradients. Water Impermeability is tested in accordance with EN ISO 15383. Water penetration shall not appear less than 30 minutes after the start of the test and is essentially a pass or fail. EN511 Protective Gloves Against Cold

Performance Level After Flame Time (s) After Glow Time (s)

1

2

3

4

≤ 20

≤ 10

≤ 3

≤ 2 ≤ 5

≤ 120

≤ 25

-

Performance Level

1

2

3

4

Contact Temperature 0 C

100 ≥ 15

250 ≥ 15

350 ≥ 15

500 ≥ 15

Threshold Time

Performance Level

1

2

3

4

≥ 4

≥ 7

≥ 10

≥ 18

Heat Transfer Index HTI (s)

Performance Level

1

2

3

4

≥ 7

≥ 20

≥ 50

≥ 95

Heat Transfer Index HTI (s)

Performance Level Number of Droplets

1

2

3

4

≥ 10

≥ 15

≥ 25

≥ 35

Performance Level

1

2

3

4

Molten Iron (g)

30

60

120

200

Performance Level Thermal Insulation (ITR) in m 2 0 C/W

1

2

3

4

0.15 ≤ I TR

0.22 ≤ I TR

<0.30 0.30 ≤ I TR

0.10 ≤ I TR

<0.15

<0.22

Performance Level 4 Thermal Resistance 0.025 ≤ R <0.050 0.050 ≤ RR <0.100 0.100 ≤ R <0.150 0.150 ≤ R (R) in m 2 0 C/W/W 1 2 3

EN60903 Live Working Gloves of Insulating Material

A/C

Testing Voltage 2,500V 5,000V 10,000V 20,000V 30,000V 40,000V

Maximum

D/C

Testing

Maximum

Class

Working Voltage

Class

Voltage Working Voltage

To obtain compliance with EN60903, all gloves must be tested to the relevant voltage in the table opposite. The construction, thickness and test voltage combine to give the class compliance. To maintain compliance, gloves of classes 1, 2, 3 and 4 must be inspected every 6 months.

00

500V

00

4,000V 10,000V 20,000V 30,000V 40,000V 60,000V

750V

0

1,000V 7,500V 17,000V 26,500V 36,000V

0

1,500V 11,250V 25,500V 39,750V 54,000V

1

1

2 3 4

2 3 4

8