从电力,化工和其它装置的功率和容量,以及工质参数(压力,温度)总的增长趋势来看,设备和管道的尺寸——直径,壁厚也在显著增大。因此对核电装置的可靠性和持久性的要求也显著提高了。开展了与容器壳体的筒体或封头座和管道上模压管座的制造方法(代替在容器壳体上焊接管座的方法)。 From the power and capacity of power, chemical and other devices, and the general trend of increase in working fluid parameters (pressure, temperature), the size of equipment and pipe - the diameter and wall thickness are also significantly increased. Therefore, the reliability and durability requirements of nuclear power plants are also significantly improved. A method of making a tube or header and a tube-on-tube socket, instead of a method of welding a header to a container shell, has been developed.