Liquid pipe connection universal joint and liquid-processing equipment using same

The purpose of the present invention is to provide a liquid pipe connection universal joint of excellent damping performance and earthquake resistance with which pipe installation is easy even in narrow spaces, significant reduction of pipe installation construction cost is possible, and connection strength in the structure of the universal joint itself is high. Provided is a pipe connection universal joint (100) wherein the edge (12, 13) of an end of a first or second interfitting section (3, 7) is formed in a direction (V) from a reference plane (T), which is defined in the present invention, (V) being opposite to the side where the straight pipe section (1) is connected. The edge is formed at a distance (L) from the reference plane (T), (L) being 21 to 23% of the maximum diameter (R1) or (R2) of the first or second interfitting section (3, 7) at the reference plane (T). 提供种液状流体配管接合部用万向接头，即使在狭窄的空间内也容易进行配管设置施工，并能够大幅度削减配管设置施工费用，万向接头其本身的结构中的接合强度较高，减震性和抗震性优越。配管接合部用万向接头(100)的第或者第二嵌合部(3、7)的端部周缘部(12、13)从本发明中定义的基准平