The quality of the circumferentialwelding in pressure vessels must be paid full attention. This is the key point to guarantee the safety of the pressure vessels in operation.
希压力容器有关工程技术人员要充分重视压力容器环焊缝的质量问题，以确保压力容器的安全使用。
2
The circumferentialwelding and the straight seam welding at all position can be realizable by using welding crawl equipment for all position together with the flexible metal band track.
全位置焊接爬行器配用柔性的钢带轨道可实现空间位置的环缝和直缝焊接。
3
An analysis of high fault probability in circumferentialwelding seams in pressure vessels was carried out from the cause of design, the standard based on and the process of fabrication.