Blowtorch

A blowtorch, or gas torch, is a handheld tool that produces a focused flame for heating metals, soldering and brazing, paint removal, and culinary tasks such as caramelizing sugar. It uses a controlled flow of fuel gas from a cylinder and a nozzle to create an adjustable flame, typically ignited by a piezoelectric igniter or striker.

Most consumer blowtorches operate on propane or butane. Fuel passes through a valve and regulator, then mixes with air at the head to form the flame. The operator can adjust flame size and, in some models, the air-to-fuel ratio. The resulting flame can reach temperatures of several thousand degrees Celsius at the tip, depending on fuel and mixture.

Common types include culinary torches for browning foods, jeweler’s or precision torches for soldering and small brazing tasks, and plumber’s torches for heating pipes and removing old fittings. Heavier, industrial blowtorches are used in metalworking and roofing. For welding and cutting, oxy-fuel torches with separate oxygen supply are used, and are generally distinct from handheld blowtorches.

Safety and handling: blowtorches present burn and fire hazards. Use in well-ventilated areas, away from flammable materials. Inspect gas cylinders, hoses, and regulators for leaks, and store cylinders upright when not in use. Use eye protection and heat-resistant gloves, and follow manufacturer guidance on ignition and shutoff procedures.

See also: culinary torch, propane torch, butane torch, soldering, brazing.