A protective coating. No. 1 is for interior surfaces of pressure steam tanks including boilers, economizers, calorifiers, turbines and hot water tanks of temperature above 100°C (212oF). No. 3 is for wet surfaces of a temperature below 50oC (125oF) or for dry, hot surfaces up to a temperature of 200oC (400oF).
一层保护层。1号适用于压力蒸汽箱的内表面,包括锅炉、省煤器、热水器、涡轮机和温度超过100°C(212华氏度)的热水箱。3号适用于温度低于50摄氏度(125华氏度)的潮湿表面或温度高达200摄氏度(400华氏度)的干燥、炎热表面。