PTFE flange covers for leak protection, with strong tensile strength, long-term use temperature range between -190 ℃ ~ 280 ℃, with weather resistance, anti-aging; chemical resistance, strong acid, strong alkali, Wang Water and a variety of organic solvents corrosion; with high insulation properties, anti-ultraviolet, anti-static; has good mechanical properties, fire retardant; easy installation, long service life;