In petroleum, chemical, power station equipment, the process piping and petrochemical tube furnace and boiler furnace tubes are mostly low-carbon steel, the most common brands are: 10,20, Q235, 20g. Because these devices harsh process conditions, the quality of the weld and pipe cleanliness requirements are higher, in the field of construction, we often use manual GTAW (TIG) and SMAW rendering (SMAW) filling, cover surface welding of carbon steel welded pipe is more important. China in the early 1980s, began to promote the installation manual pipeline welding TIG rendering technology, at present, in addition to electric power construction system developed special welding wire and GB/T8110-1995 part of the standard recommended in the use of gas welding carbon steel, low alloy steel welding wire can be used as TIG welding, in general, are used with wire and submerged arc welding with CO2 Gas Shielded Welding Wire as TIG welding. Because of the low carbon steel welding consumables primarily by "equal strength" principle use, the current construction standards and related manuals are recommended Mig Welding Wires: H08 (or H08A), H08Mn2Si, TIG-J50, ER49-1.