Bursting discs, also known as rupture discs, are safety devices used in various industries to prevent overpressure in equipment. They are designed to rupture at a predetermined pressure, allowing excess pressure to escape and protecting equipment from damage or failure. These discs are typically made from materials like metal or plastic and are installed in pressure vessels, pipelines, and other systems. When the internal pressure exceeds the disc's rated limit, it bursts, creating an opening for gases or liquids to vent safely. This process helps maintain safe operating conditions and prevents catastrophic failures, ensuring the safety of personnel and equipment in facilities such as chemical plants and oil refineries.