长庆油田输气干线所用的进口直缝管，钢材较软，在外污腐施工中其坡。极寻磨损和受力变形，直接影响管道的焊接施工质量，为此研制了在吊装、转运、接管、税管和挡管过程中用于坡口保护的吊管器、管接头和挡管器，这些被日保护装置已成功地应用于外防腐施工，有效地保护了钢管的坡口。 Changqing Oilfield gas trunk imported straight seam pipe, steel softer, outside the construction of its slope in the rot. Pole wear and stress deformation, a direct impact on the quality of the construction of the pipeline welding, thus developed in the lifting, transport, takeover, tax management and blocking process for groove protection of the pipe, fittings and pipe , These are the Japanese protection device has been successfully applied to the construction of anti-corrosion, effectively protecting the pipe bevel.