Pressure vessels are closed containers designed to store gases, liquids, or vapors under pressure. They are commonly used in various industrial, commercial, and residential applications. Depending on their function and intended use, there are different types of pressure vessels. Here are some common types:

1. Air Tanks: Air tanks are used to store compressed air generated by air compressors. They are widely used in industrial facilities, automotive sector, construction projects, and many other applications. Air tanks provide compressed air for air tools, machinery, and pneumatic systems.

2. Water Tanks: Water tanks are used for storing water. They can be used as water storage tanks or pressure tanks in residential buildings. In industrial facilities, water tanks are used for fire suppression systems, cooling systems, or water treatment systems.

3. Fuel Tanks: Fuel tanks are designed to store fuels. They are commonly found in gas stations, power plants, ships, aircraft, and other vehicles. Fuel tanks ensure safe storage and transportation of the stored fuel.

4. Propane Tanks: Propane tanks are used for storing propane or other liquefied petroleum gases. They are commonly used for heating, cooking, backup power systems, and industrial applications.

5. Chemical Tanks: Chemical tanks are designed for the storage or transportation of chemicals. They are used in chemical industries, laboratories, water treatment plants, oil refineries, and other industrial facilities. Chemical tanks are constructed with special materials and equipped with leak-proof systems to ensure the safe storage of chemicals.

These are just a few examples, and there are many other types of pressure vessels used for various purposes. The design, construction, and use of pressure vessels should comply with local safety standards and regulations. Regular maintenance and periodic inspections by authorized personnel are important to ensure the safe and reliable operation of pressure vessels.