| 摘要 |
A liquid tank has an outlet opening in its bottom. A pipe-shaped drain stub extends from the outlet opening and has a circular-sector-shaped partial flange on its free end. At least one complementary flange adjoins and complements the partial flange to form therewith a complete first circular flange. The complementary flange may be another partial flange with a throughhole connected to another tank, or a solid blind flange. The first circular flange is sealed and secured to a second circular flange, which is further connected to a single drain line. The two circular flanges may have the same diameter and the same aligned circle centerpoint. Alternatively, the drain stub of each tank is flange-connected to a respective connection stub extending from a circular flange. This provides a modular reconfigurable system allowing a selected plurality of liquid tanks to be connected to a single drain line through the flange arrangement.
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