An old-fashioned kerosene blowlamp

A blowlamp is a simple heating torch, which burns fuel with ambient atmospheric air. It will typically run on propane or butane cartridges, or be fed from a liquid petroleum gas cylinder via a hose. They produce a much larger, softer flame than an oxyacetylene torch and are used for low temperature applications - soldering, brazing, melting roof tar, or pre-heating large castings before welding, such as for repairing cast-iron cylinder heads. They cannot be used for welding, but find many other uses, not least because in their simplest form of a disposable canister feeding a hand-held torch they are very cheap and highly portable, and because the LPG fuel is very cheap in comparison to acetylene and oxygen. Kerosene-burning Blowtorch. ... In physics, heat, symbolized by Q, is defined as energy in transit. ... A burning torch, discarded on the road in the wake of the Lewes Bonfire Night celebrations. ... Fuel is any material that is capable of releasing energy when its chemical or physical structure is changed or converted. ... View of Jupiters active atmosphere, including the Great Red Spot. ... An oxidizing agent is a substance that oxidizes another substance in electrochemistry or redox chemical reactions in general. ... Propane is a three-carbon alkane, normally a gas, but compressible to a liquid that is transportable. ... Butane, also called n-butane, is the unbranched alkane with four carbon atoms, CH3CH2CH2CH3. ... Liquified petroleum gas (also called liquefied petroleum gas, liquid petroleum gas, LPG, LP gas, or autogas) is a mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles, and increasingly replacing fluorocarbons as an aerosol propellant and a refrigerant to reduce damage to the ozone layer. ... It has been suggested that Why is a flame blue? be merged into this article or section. ... It has been suggested that this article or section be merged with Oxy-fuel welding and cutting. ... (De)soldering a contact from a wire. ... Brazing is a joining process whereby a non-ferrous filler metal and an alloy are heated to melting temperature (above 450°C / 800°F) and distributed between two or more close-fitting parts by capillary action. ... Tar is a viscous black liquid derived from the destructive distillation of organic matter. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ... Cast iron usually refers to grey cast iron, but can mean any of a group of iron-based alloys containing more than 2% carbon (alloys with less carbon are carbon steel by definition). ... Acetylene (IUPAC name: ethyne) is the simplest alkyne hydrocarbon, consisting of two hydrogen atoms and two carbon atoms connected by a triple bond. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless (gas) very pale blue (liquid) Atomic mass 15. ...

Older blowlamps used liquid fuel such as kerosene in the form of paraffin oil, or gasoline and more recently biodiesel. These are largely redundant, and may be difficult to start, requiring pre-heating with methylated spirit. If any doubts exist as to the integrity of the pressurized fuel tank or any of the seals in the torch, it should be treated strictly as an antique - if the tank bursts there is a very real risk of explosion or fire. Russian kerosene lamp Kerosene or paraffin oil (British English, not to be confused with the waxy solid also called paraffin wax or just paraffin) is a colorless flammable hydrocarbon liquid. ... Paraffin is a common name for a group of alkane hydrocarbons with the general formula CnH2n+2, where n is greater than about 20, discovered by Carl Reichenbach. ... Gasoline, also called petrol, is a petroleum-derived liquid mixture consisting mostly of hydrocarbons and enhanced with benzene or iso-octane to increase octane ratings, used as fuel in internal combustion engines. ... Methylation refers to the replacement of a hydrogen atom (H) with a methyl group (CH3), regardless of the substrate. ... Wiktionary has a definition of: Pressurization Pressurization generally refers to the application of pressure in a given situation or environment; and more specifically refers to the process by which atmospheric pressure is maintained in an isolated or semi-isolated atmospheric environment (for instance, in an aircraft, or whilst Scuba diving). ... Fire is a self-sustaining oxidation process accompanied by heat and light in the form of a glow or flames. ...

See also

• Propane torch
• Oxy-fuel welding and cutting
• Gas burner