... detergent – water: wash for 3 minutes with normal atmospheric temperature water or hot water above 60°C , wash for ... density between 1%~2% HNO3 detergent at a temperature between 60°C~80°C -- wash for 10 ... density between 1%~2% NAOH detergent at a temperature 60°C~80°C, if necessary, 20-50PPM ... time of each equipment or pipe, and the temperature controlling range of HNO3,NAOH liquid.6) Operators should ...