Research on Automatic Welding Technology of Heat Exchanger Tube and Tube-sheet
The welding between the heat exchange tube and the tube-sheet in the heat exchange equipment is the key technology of the whole equipment manufacturing.the traditional manual welding of tube and tube-sheet can not meet the requirements of large-scale products and technical upgrading.In order to upgrade the product technology,automatic welding of important tube and tube-sheet welding technology is carried out.According to the requirements of ASME Ⅷ-1volume specification,the automatic welding of simulated test parts is completed by the operators skill assessment and qualification authorization.Tube sheet surfacing,tube sheet and tube hole processing,automatic welding of joints,nondestructive testing,making various tooling,finally compete the tube side pressure test.All qualified,no leakage,through the sample preparation,macroscopic metallographic examination,joint shear load test are strictly in accordance with ASME specification and process program implementation,testing results are in line with the design,standard requirement.It has been proved that the quality of pipe to tube-sheet joints welded by automatic welding is safe and reliable.
万方数据
维普
