This product is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, water heating, fire fighting, electric power and other basic projects because of its excellent comprehensive properties. According to different materials can be made acid-resistant, alkali-resistant, corrosion-resistant, oil-resistant, heat-resistant, radiation-resistant, wear-resistant, aging-resistant and other varieties, suitable for a variety of media and environment.