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  1. Southwark

    Leaking Plug valves and Flange in Continuous Service

    Operating a natural gas pipeline class 900# with MAOP 15MPa. We have a 3 plug valve configuration bypass around a mainline valve. The valves connected to the mainline are weld/flange, while the middle valve is flange/flange. These valves have been found to be leaking and we are unable to seal...
  2. Southwark

    Specification for ASTM A216 WCB

    Does anyone know where I can find details on this material? We have plug valves in service that operate up to 15MPa with a temperature range of -10 to 55 deg C, class 900#.

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