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锅炉压力容器有些设计结构中,常遇到三通型式的异型件和采用骑座式管接头进行支管和主管的连接,由于坡口加工的技术要求比较复杂,焊制也比较困难,因此需要施焊人员具备较高的技术水平才能圆满完成焊接工作。目前在各工业锅炉厂制造的KZL型锅炉中,下降管和集箱连接的部位多采用骑座式管接头如图1。由于在集箱上开孔,引起应力集中,而且连接接头的肩部和腹部存在着峰值应
Boiler pressure vessels in some design structures, often encountered three-shaped type of shaped parts and the use of seat-type pipe fittings for pipe and main pipe connections, due to the technical requirements of beveling more complex, welding is also more difficult, so the need for facilities Welding personnel have a higher level of skills to successfully complete the welding work. Currently in the KZL-type boiler manufactured in various industrial boiler plant, the drop pipe and the header connected to the use of multi-seat pipe fittings shown in Figure 1. As the hole in the header, causing stress concentration, and the connection of the shoulder and abdomen there should be a peak