Butterfly valve is an indispensable pipeline system equipment. If the pipeline system meets the requirements, the power station control valve must also meet the requirements. This is exactly what the editors of the ASME Code discussed. According to the regulations, if pipelines and butterfly valves are planned in accordance with regulations, and the manufacturer can show that the weak part of the power station control valve is also stronger than the pipeline, then the power station control valve is considered qualified.
This should firstly show that the cross-sectional area of the valve and the value of the cross-sectional membrane are at least 10% higher than those of the pipeline. If the raw materials of the pipeline and the power station control valve are different, then consider the difference in the pressure that they can accept. (According to ASMEIll, NCl/ND3S21).
For valves and pipelines of the same pipeline size, it can undoubtedly prove to meet the requirements; the typical situation is that the strength of the valve is 300% to 400% higher than that of the pipeline connected to it. When the pipeline size is 2 times or more smaller. Then there is a problem.
