Inside-out air seat test

{
  "id": "MLC-T-OAG-002002",
  "term": "Inside-out air seat test",
  "field": "Oil and gas",
  "definition": "A pressure test that can be performed only on independent seating trunnion mounted ball valves, in which the valve is closed and the body cavity is pressurized with air. All the seals of an independent seating ball valve can then be tested together by watching for leakage past the seats. It is part of pipeline valve commissioning.",
  "subject": "Production",
  "url": "https://mlchart.com/terminology/oil-and-gas/inside-out-air-seat-test/"
}