Few tools are quite as cool as a gas torch, which can create a true spectacle with all the illuminated sparks it produces while being used. Gas torches, also know as cutting blow torches, can be described as gas-burning tools that are designed to apply extensive heat to different types of applications. They're most commonly used in the processes of metalworking and oxy-fuel cutting. Particularly the process of oxy-fuel cutting is usually based on the use of a gas torch since it combines gas and oxygen to cut as well as weld metals together. The gas torch was invented in the late 19th century and considerably improved the welding process.
Gas torches work on simple principles and are very efficient. They can produce extremely hot flames and make use of the extensive heat to cut and mold metal pieces. Their ability to utilise highly combustible gases in just the right amount is what makes them so efficient and practical. It's important to mention that due to the hot flames and combustible gases, a gas torch can be included in the category of dangerous tools, therefore proper safety measures and considerable skills are required when operating with one.
All gas torches have a simple construction and since their invention their design hasn't changed much. A professional gas torch is made up of various parts including two gas regulators, two hoses, a cylinder of oxygen, a cylinder of fuel gas and a torch with a tip. The main function of the regulators is to control the flow and pressure of the gas. Applying the the correct gas pressure for the job is key to avoiding serious accidents when using a blow torch. Each regulator comes with two gauges, one for measuring the pressure in the tank and one for reading the gas pressure the is delivered to the house and torch. The head of the torch includes two needle valves whose purpose is to control the flow of the oxygen and the fuel gas. The torch head also has a tip attached to it, which is adjusted according to that is being performed.
Blow torches can be categorized according to the type of gas they use. Acetylene is the most commonly used gas in professional torches, while smaller ones, designed mainly for home use often work on propane or butane. Usually available in either refillable or disposable cylinders that you can adjust to the torch head, propane is a gas that burns hotter than butane and is often used for such tasks as paint stripping and soldering. Butane torches include an internal tank which is refilled through an aerosol can.