A pressure vessel is a container designed to hold gases or liquids at a pressure significantly different from the ambient pressure. These vessels are commonly used in various industries, including oil and gas, chemical processing, and power generation, to safely store and transport materials under high pressure. Pressure vessels are built to withstand extreme conditions and are often made from strong materials like steel or composite materials. They must adhere to strict safety standards and regulations to prevent accidents, such as explosions or leaks, which can pose serious risks to both people and the environment.