A long back cap is generally a type of cap that is longer in length. It provides extended coverage or protection to the back of the weld joint. This type of back cap is commonly used in situations where deeper penetration is needed or where there is a need to control the flow of molten metal during the welding process. The long back cap helps in preventing excessive spillage or leakage of the molten weld metal.
A short back cap, in contrast, is shorter in le provides a more limited area of coverage. g used in situations where the weld is shallo, excessive heat or metal flow is not a concen. back caps are often used for lighter, more s welds or where there is no need for extender, on the backside of the weld.
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