NSF ANSI 52 pdf free download

NSF ANSI 52 pdf free download.Supplemental flooring.
6.2 Absorption / adsorption
6.2.1 Performance requirement
Supplemental flooring shall be resistant to the absorption or adsorption of water or oil.
6.2.2 Test method
6.2.2.1 Water resistance
6.2.2.1.1 General purpose flooring
Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 ± 3 °F (23 ± 2 C) and 50% ± 5% relative humidity for a period of at least 24 h. The three samples shall each be separately weighed to the nearest 0.001 g. Test samples will then be exposed to a solution of tap water and household detergent. The test solution shall have a pH between 8 and 9. a detergent concentration of 0.3% ± 0.05%. and a temperature maintained at 100 ± 2 F (38 ±1 :C). Exposure shall be for a period of 6 h. The solution shall be of sufficient volume to completely submerge all of the samples. Following the exposure, samples shall be pat-dried with a paper towel to remove excess water, and individually reweighed.
6.2.2.1.2 Heavy duty flooring
Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 ± 3 F (23 ± 2 cC) and 50% ± 5% relative humidity for a period of at least 24 h. The three samples shall each be separately weighed to the nearest 0.001 g. Test samples will then be exposed to a solution of tap water and commercial detergent. The test solution shall have a pH between 11 and 12, a detergent concentration of 0.3% ± 0.05%, and a temperature maintained at 150 ± 2 °F (66 ± 1 °C). Exposure shall be for a period of 24 h. The solution shall be of sufficient volume to completely submerge all of the samples. Following the exposure, samples shall be pat-dried with a paper towel to remove excess water, and individually reweighed.
6.2.2.2 Oil resistance
6.2.2.2.1 General purpose flooring
Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 ± 3 °F (23 ± 2 °C) and 50% ± 5% relative humidity for a period of at least 24 h. The three samples shall each be separately weighed to the nearest 0.001 g. Test samples will then be exposed to preheated vegetable shortening maintained at 150 ± 3 F (66 ± 2 cc). Exposure shall be for a period of 24 h. The vegetable shortening shall be of sufficient volume to completely submerge all of the samples. Following the exposure, samples shall be pat-dried with a paper towel to remove excess oil. and individually reweighed.
6.2.2.1.2 Heavy duty flooring
Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 ± 3 F (23 ± 2 °C) and 50% ± 5% relative humidity for a period of at least 24 h. The three samples shall each be separately weighed to the nearest 0.001 g. Test samples will then be exposed to preheated vegetable shortening maintained at 150 ± 3 F (66 ± 2 C). Exposure shall be for a period of 60 h. The vegetable shortening shall be of sufficient volume to completely submerge all of the samples. Following the exposure, samples shall be pat-dried with a paper towel to remove excess oil. and individually reweighed.
6.2.3 Acceptance criteria
6.2.3.1 Water resistance
— general purpose — Change in weight of each individual sample shall not exceed ± 5%.
— heavy duty — Change in weight of each individual sample shall not exceed ± 5%.
6.2.3.2 Oil resistance
— general purpose — Change in weight of each individual sample shall not exceed ± 10%.
— heavy duty — Change in weight of each individual sample shall not exceed ± 5%.
6.3 Temperature resistance
6.3.1 Performance requirement
Supplemental flooring shall be resistant to hot liquids. Heavy duty supplemental flooring shall also be resistant to heated air.
6.3.2 Test method
6.3.2.1 Resistance to hot liquid
6.3.2.1.1 General purpose flooring
A sing’e test sample measuring 2 in x 2 in (50 mm x 50 mm) shall be placed on thirty-six 1 in x 1 in (25 mm x
25 mm) quarry tiles laid flat in a 6 in x 6 in (150 mm x 150 mm) pan (see figure 1). The sample. quarry tiles,
and pan shall be conditioned at 73 ± 3 °F (23 ± 2 cc) and 50% ± 5 % relative humidity for a period of at least
24 h. The test sample will then be exposed to 0.5 L ±30 mL preheated tap water at 200 ±3°F (930 ±2 °C) by
pouring of the water over the sample. The water shall be allowed to cool to 100 ± 2 F (38 C ± 1 C) prior to
removal of the sample.NSF ANSI 52 pdf download.