Indicator Name Indicator Type A Type B Type C Agent Liquid Appearance Colorless, transparent, homogeneous viscous liquid Viscosity (50°C, mm2/s) 2～19 1～6 0.4～1.5 Internal pressure (50±1)°C, MPa ≤ 1.0 Leak test (50±1)℃, constant temperature water bath, no leakage, no leakage, no leakage, ejection rate (%) ≥ 98.0 98.0 98.0 ※Heat resistance is maintained at (40±2)℃ for 24 hours, and can be used normally after returning to room temperature ※Cold resistance Keep at (0±5)℃ for 24h, return to room temperature and can be used normally ※Corrosiveness (30℃±2℃, 2h) Appearance of No. 45 steel, grade 0 Corrosion amount, mg ≤ 2