This standard applies to non-optical testing of welding goggles and masks. GB/T 3609.2-1983 Non-optical testing methods for welding goggles and masks GB/T3609.2-1983 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Non-optical test for welding goggles and masks
Test methods
Methods of non - optical test for welding goggles and masks
This standard applies to non-optical test for welding goggles and masks. Heat resistance test
UDC 614.891/.893
: 621.791:620
GB 3609.2—83
Put the tested filter in warm water at 67±2℃ and heat it for 3 minutes, then immediately put it in water below 4℃ to observe its changes. No abnormal phenomenon is allowed.
2 Flame resistance test
Cut 3 pieces of 13mm×127mm from the thinnest part of the tested mask, fix it, and light the other end with an alcohol lamp. Calculate the average burning speed, which should be less than 76mm/min. 3 Corrosion resistance test
Immerse the metal parts in boiling 10% salt solution for 15 minutes, then take them out immediately, keep the remaining liquid on them, dry them at room temperature for 24 hours, and finally rinse them with warm water and dry them. Observe the surface. If there is no change, it is qualified. Filter strength test
The test equipment is as shown in the figure:bZxz.net
National Bureau of Standards 1983-0415 Issued
1984-01-01 Implementation
Fixing bolts
Stabilizing plate
Test sample
Rubber pad
Support seat
Steel ball delivery hole
GB3609.2—83
Location ruler
Fixing bolts
Elevation column
Schematic diagram of lens impact resistance test device
The main components of the equipment are made of stainless steel. The basic structure is divided into two parts, upper and lower, with the elevation column as the boundary. The upper part is the elevation column. The part connected to the elevation column is the positioning ruler, which can be adjusted to slide up and down freely at any time. The required height is fixed by a fixing bolt. The other end of the positioning ruler is a steel ball placement hole, and the center of the hole should be aligned with the center of the test sample. The lower part is a bracket device for fixing the sample. The middle of the steel seat is hollow and slightly smaller than the size of the lens. Two types of rectangular and circular sample slots can be prepared respectively. For testing rectangular lenses, a sample slot with a length of 108mm, a width of 50mm, and a depth of 6mm is milled on the top (middle) of the steel seat; for testing circular lenses, a sample slot with a diameter of 54mm and a depth of 6mm is milled on the top (middle) of the steel seat to place the test sample. Rubber washers with a thickness of 3mm and a Brinell hardness of 40±2 are placed on the upper and lower sides of the sample, and the test sample is fixed in the slot by a stable pressure plate and fixing bolts on the top. 4.2 Brief description of the test method
A 16g steel ball is dropped vertically from a height of 0.6m without any kinetic energy onto the filter or protective sheet. The test piece without damage is qualified. If there is one protective sheet, two filters, or two protective sheets and one filter, a steel ball of the same weight is dropped freely from 1.2m onto the lens with the same equipment. The test piece without damage is qualified after three consecutive impacts. 4.3 Test process
Place the test sample in the sample slot, keep the sample horizontal, place rubber pads on the top and bottom, install a stable pressure plate, fix the positioning ruler at the position of 0.6m, and fix the sample and positioning ruler with fixing bolts. Then use a 16g steel ball to drop freely onto the test sample from the drop hole without any kinetic energy. Test the three-layer lens in the same way. The positioning ruler is fixed at 1.2m on the elevation column and the above process can be followed. 70
GB3609.2-83
Additional Notes:
This standard was proposed by the Ministry of Labor and Personnel of the People's Republic of China. This standard was drafted by the Beijing Institute of Labor Protection Science. The main drafters of this standard are Li Shuxian, Xing Zhiming, Ti Changqing and Du Xia. 71
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