Petroleum and chemical industry: In the petroleum and chemical industry, welding end flanges are widely used due to the fact that pipelines and equipment generally transport liquids or gases. For example, petroleum and natural gas storage tanks, reactors in chemical plants, distillation towers, heaters, coolers, heat exchangers, storage tanks, and oil pipelines all require the use of welding end flanges for connection.Power industry: In the power industry, welded end flanges are widely used in the connection of various pipelines and equipment, such as steam turbines, boilers, chimneys, etc.Food and beverage industry: In the food and beverage industry, welded end flanges are used for the connection of various pipelines and equipment to ensure the hygiene and safety of food and beverages.Pharmaceutical industry: In the pharmaceutical industry, welded end flanges are used for the connection of various pipelines and equipment to ensure the cleanliness and hygiene standards of the drug production process.Other fields: Welded end flanges are also widely used in other fields such as shipbuilding, environmental protection, and nuclear energy.In short, welded end flanges are widely used in many industrial fields, mainly for connecting and sealing purposes, and are an integral part of industrial production.