What is Gas Welding? Gas welding is a metal joining process conducted by melting the metals with the help of fuel gases like acetylene, propane, or hydrogen mixed with oxygen to produce the weld. This welding type is commonly known as 'Oxy Acetylene Welding'. This is because oxygen and acetylene are the most commonly used gases in this type. Edmund Davy discovered Acetylene in 1836 and it Two characteristics of atmospheric gases determine the strength of their greenhouse effect. The first is their ability to absorb energy and radiate it (their "radiative efficiency"). The second is the atmospheric lifetime, which measures how long the gas stays in the atmosphere before natural processes (e.g., chemical reactions) remove it. Neon Argon Krypton Methane Radon Fluorine Chlorine sulfur dioxide ammonia Nitrous oxide Acetylene Methyl chloride Dichlorodifluoromethane Hydrogen chloride etc. Definition of Gas Gas is a matter whose molecules are bound by week forces of attraction such that they are widely separated from each other. Table of Content List of Gases What is a Gas? Frequently Asked Questions - FAQs List of Gases The most common example of a gas is air (the air we breathe is a gas). It can also be considered as a mixture of many gases such as nitrogen, oxygen and carbon dioxide. Some examples of gases are listed below. Hydrogen Nitrogen Oxygen Carbon Dioxide Definition. Toxic: a chemical that has a median lethal concentration (LC 50) in air of more than 200 parts per million (ppm) but not more than 2,000 parts per million by volume of gas or vapor, or more than 2 milligrams per liter but not more than 20 milligrams per liter of mist, fume or dust, when administered by continuous inhalation for 1 hour (or less if death occurs within 1 hour) to YRysZw.

name two fuel gases