If by gas welding you mean-oxyacetylene welding. The difference is just that arc welding requires a darker shade of lens.
When oxyfuel gas welding (OFW) usually a shade 5 lens is recommended.
When arc welding, a minimum of shade 10 lens should be used (actually shade should be determined by amount of current used).
yes ' +++ You do NOT use "goggles" when arc-welding. You use a proper face-shield (mine is the auto-darkening type), and you should not expose any skin to the arc's intense UV radiation.
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
There's some information on welding at http://www.WeldingFun.com .. should have the answer your looking for. Sorry for being to lazy to look it up
Arc welding uses an electric arc to melt and join metal pieces together, while resistance welding uses heat generated by the resistance to electric current flow between two metal pieces to join them together. Arc welding is more versatile and can be used for various types of metals, while resistance welding is more suited for high-speed production and is commonly used in automotive and appliance manufacturing.
The full form of ARC in arc welding is "Arc welding with Consumable Electrode."
Welding Electrorodes or Welding Rods are used in arc welding. Arc welding is a special type of welding which uses a welding power supply to create an electric arc between the base material (e.g. steel) and the electrode. The Welding Ectrorodes can be used for all weldable aluminum and mild steel.
EFW: Electric Fusion Welding is a more general term which includes Electric resistance welding (ERW) and other types of welding such as Arc welding.
Arc welding temperatures can range from 5,000°F to 20,000°F, depending on the specific welding process and materials being used. These high temperatures are generated by an electric arc formed between the welding tool and the workpiece.
If you are asking for the correct nomenclature it is Shielded Metal Arc Welding.
tungsten inert gas metal inert gas now refered to as gmaw gas metal arc welding.
Almost all welding today is done with electricity (Arc Welding) even on cast iron. SMAW, GTAW, GMAW etc. --AW means Arc Welding.
Stick welding is also more difficult to learn and use, particularly the ability to strike and maintain an arc. Arc welders are available in AC, DC or AC/DC, with AC being the most economical. It's used for welding thicker metals of 1/16 inch or greater.