Which term describes directional burning that can result from a leak in a high-pressure pipe or vessel?

Which term describes directional burning that can result from a leak in a high-pressure pipe or vessel?

• A. Jet
• B. Pool
• C. Flash
• D. Fireball

Answer: (A)

Jet fire describes directional burning that follows the path of a high‑pressure gas jet released from a pipe or vessel. When gas escapes under high pressure, it streams out as a narrow, fast-moving jet; if ignition occurs, the flame travels along that jet, creating a directed, elongated blaze. This is distinct from a pool fire, which burns liquid fuel on a surface rather than along a jet path; a flash fire, while involving rapid ignition of a vapor cloud, isn’t a sustained jet burning in the leak direction; and a fireball results from rapid vaporization and mixing into a roughly spherical flame. So the term that best fits directional burning from a high-pressure leak is jet fire.

Jet fire describes directional burning that follows the path of a high‑pressure gas jet released from a pipe or vessel. When gas escapes under high pressure, it streams out as a narrow, fast-moving jet; if ignition occurs, the flame travels along that jet, creating a directed, elongated blaze. This is distinct from a pool fire, which burns liquid fuel on a surface rather than along a jet path; a flash fire, while involving rapid ignition of a vapor cloud, isn’t a sustained jet burning in the leak direction; and a fireball results from rapid vaporization and mixing into a roughly spherical flame. So the term that best fits directional burning from a high-pressure leak is jet fire.