焊接工艺评定焊缝的机械性能要比实际生产条件下焊成的焊缝好得多为了保证管线和结构件工地焊接的质量,通常在实际进行工地焊接之前通过工艺评定程序进行广泛的试验。在工地焊接时,有时可能要求从实际生产焊缝上切取试件进行试验。虽然这两种试验都可能做过,而且焊缝的质量能够满足要求。但是,有关这两种试验得出的焊缝质量水平的差异的可用数据却很有限。因此,本研究的目的是系统地研究,取自管线和 Weld process evaluates weld mechanical properties much better than welds made under actual production conditions. In order to ensure the quality of welds at pipe and structural work sites, a wide range of tests are usually carried out through a process qualification program prior to actual site welding. When welding on site, it may sometimes be required to cut the test specimen from the actual production weld. Although both tests are possible, and the quality of the weld to meet the requirements. However, the available data on the differences in weld quality levels obtained from these two tests are very limited. Therefore, the purpose of this study is to systematically study, taken from the pipeline and