long welding neck: the neck height is high, the rigidity and bearing capacity of the flange are improved. Compared with butt welding flange, welding workload big, electrode consumption is high, can't withstand high temperature and high pressure and repeated bending and temperature fluctuations, but the installation is convenient, can be omitted weld take knead injury process, more popular.
Shanxi Anbao Forging Corporation.
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