Most raw materials and welding materials in the European standard is between 1992-1998 drafted by the European Committee for Standardization and formulated the final vote by the member states, once adopted, the standard of the original welding cable will be abolished, the implementation of a unified European standards. From the contents, the source consists of three parts, part of the former European standards (EU), EU standards is a major EU member states in four to five years in the historical process of the formation of a series of standards of technical documents, so more familiar and readily accepted by the Member States; such as former European standards EU20 (steel, concepts, classifications) into the European standard EN10020 (steel, concepts, classifications). The second part is the German Industrial Standard (DIN), the German economy in the European Union status and its metallurgy, welding technology, the superior performance of the contents of the DIN standard as the current European standards. Such as the German standard DIN8575 (heat resistant steel gas welding wire) into the European standard EN12070 (heat resistant steel gas welding wire); The third part is the ISO equivalent of existing standards for the aluminum flux core welding wire  to the adoption of standards such as international standard ISO13916 (welding preheat, interpass and protection of temperature measurement) into the European standard EN ISO13916 (welding, preheating, and the protection layer temperature measurements). From existing European standards, adopted in the formulation or as much as possible when taking into account existing ISO standards, and in the labeling method, the content is consistent with the ISO standard, the corresponding ISO standard is more than fine, more specific.