vacuum
Electron-beam welding. Electron-beam welding (EBW) is a fusion welding process in which a beam of high-velocity electrons is applied to two materials to be joined.
EBW is often performed under vacuum conditions to prevent dissipation of the electron beam.
liquid form
Acetylene gas is stored in cylinders in liquid form.
Neutral Flame
The neutral flame is the flame in which the amount of oxygen is precisely enough for burning, and neither oxidation nor reduction occurs. A flame with a good balance of oxygen is clear blue. The reducing and neutral flames are useful in soldering and annealing.
Neutral Welding Flame. The neutral flame has a one-to-one ratio of acetylene and oxygen. It obtains additional oxygen from the air and provides complete combustion. It is generally preferred for welding.
at the inner cone
The maximum flame temperature occurs At the inner cone.
less than
The maximum temperature of Oxy-hydrogen flame is about 2,800 °C.
The temperature of the oxyacetylene flame 3480 °C.