Scale. A coating of oxide on fused iron or steel that breaks off as the metal cools.
Scaling Powder. A name given flux.
Slag. The oxidized metal and scale blown out when cutting.
Soldering. Uniting metals by fusing with a different metal which has a much lower melting-point than the pieces to be joined. The use of a lead, tin and zinc alloy is called soft soldering. Hard soldering is similar to brazing.
Tacking. Fusing pieces together at one or more places.
Tip. A copper or brass nozzle for a welding or cutting torch.
V. Angle or groove between two beveled edges prepared for welding.
V-block. Block cut out in the shape of a V, or angle iron, used in lining up shafts.
Valve. A device for shutting off the passage of gas.
Vertical Welding. Welding as applied to an upright position.