一、焊缝外表面质量和焊缝内部质量同等重要。就焊缝质量而言,一般可分为焊缝内部及焊缝外表面质量,定期检验是对压力容器质量的考核,在定期检验中发现,焊缝内、外部质量从使用角度来看,差异较大,即焊缝内部质量在使用中一般处于比较稳定的状态,而焊缝外表面质量则处于易变的状态。如从大型球罐的开罐检查看到,有些六,七十年代生产的球罐,焊缝内部质量一般都控制较差,有些甚至 First, the quality of the outer surface of the weld and weld quality are equally important. The quality of the weld, the weld can be divided into the general internal and external surface quality, regular inspection is the assessment of the quality of the pressure vessel found in the regular inspection, the weld quality, external quality from the point of view of use, the difference Larger, that is, the internal quality of the weld is generally in use in a more stable state, while the outer surface of the weld quality is in a volatile state. As can be seen from the open inspection of large spherical tanks, some of the spherical tanks produced in the 1960s and 1970s generally have poor internal quality control of the weld, and some even