What would you like to do?
Answer I do not believe the gas itself will change the arc brightness much, if any at all, but if you need to change your amperage to weld quicker because of the …gas i.e. more amps to weld overhead using Argon (because its heavier than air) then you would need a darker lens. its best to simply match your amps and shade. A shade 12 is fine for most arc unless you go over 300 amps.
Neon in bulbs
i don't know exactly but i think it is neon
Nitrogen is an unreactive gas, easy to obtain and at reasonable cost. It is not used as an inert gas, but in lieu of an inert gas, of which there are only 6, it is sufficien…t and cost effective.
What type of welding can we use LPG ?
Most commonly used is argon, but Helium can be used as well.
inert gases are used because they provide inert atmosphere i.e they do not react with the sample in the column. ankur solanki
Inert gases are use for welding is because in the welding process, the heat will actually hasten up the process of oxidation(rusting) happening on metals. Oxidation process(…rusting) requires oxygen, thus, by using inert gas, it will purge the surrounding of oxygen preventing the oxidation process from happening.
Heliarc was the name used when TIG welding was first developed during WWII. A tungsten electrode carrying the current to create an arc and utilizing helium as a protective gas…. The process has evolved to utilize many different types of gasses. The name was changed to reflect this. The correct nomenclature is GTAW. Gas Tungsten Arc Welding.
Submerged arc welding uses a wire electrode (like MIG welding) and a granular flux to protect the puddle and add alloys to the weld. This flux is deposited into the weld area …by a hopper/tube arrangement which relies on gravity. The operator cannot see the weld taking place and relies on gauges to ensure the process is proceeding correctly. This process can only be done in the flat position. On the positive side a large amount of weld is deposited compared to any other process. This process can be manual, semi or fully automated. In MIG welding (Inert Gas Shielded Arc Welding) the protective shield is an inert gas which allows the operator to see the weld as it takes place. It can also be manual, semi or fully automated.
shielded metal arc welding does not required any shielding gas
When MIG welding STEEL a mixture of Argon -- CO2 is used. 75% - 25%
Is it better using welded fittings or threaded fittings on 2 inch piping for inert gas distribution networks?
If you have a lot to install i would weld. 2 in. is a very big pipe to screw together
It depends on what welding process is being used and what type of metal is being welded. When Oxy-Fuel Welding, Acetylene is the most popular. MAPP gas and Propane are also us…ed. With the GMAW (MIG) process Argon, CO2 and Oxygen gasses, in mixtures or alone, are used. GTAW (TIG) gasses are almost always Argon and/or Helium. This is not all inclusive as new processes are being developed every day. Check with your welding material supplier for relevant info.