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PDF File: Case Study: Steam

An expansion device was being installed downstream of a control valve. This expansion device was made of SS316, while the upstream piping to the device was A106B, and the downstream tank connection to the device is 2205 Duplex SS. In this case, both the upstream and downstream connections are of dissimilar metals. Additional challenges for this application were that the flanges on the expansion device were a 6” Raised Face Slip on, while the upstream piping flange is a Raised Face Weld Neck SCH 160, and the downstream flange was Raised Face Weld Neck SCH XH. In both of these cases, these were dissimilar metals, as well as dissimilar bores/faces to seal on.