Applied technique of the welding method of long distance transmission pipeline
Welding methods of long-distance transportation pipeline are essential for its manufacturing quality,reliability and security of operation.A reasonable selecting of welding methods and applying corresponding welding technology are the keys to ensure the welding quality of long-distance transportation pipeline.According to the characteristics and requirements of field welding of long-distance transformation pipeline,this paper expounds the welding methods in field welding and use situation in production site,and looks forward to the application prospects of main welding methods.
In this study, we present the analytic temperature profile in cylindrical geometry for transmissive optics. The model permits the explicit calculation of the optical path length difference across the radial direction of a rod. This allows us to determine the specific length of the compensation material to remove the thermal effect not only for a small region at the beam’s center but also for the entire geometry of the optics, including high-order aberrations for various power ranges.