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  • Users: OzGuy
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  1. OzGuy

    Isolation between two separate earthing systems and challenge of bonded structure between the two

    Hi, There are two separate facilities with separate owners/operators and separate power systems, hence separate earthing which are not connected to each other. There are metallic pipes running between the two facilities (say one side is the buyer and the other side is the supplier) where the...
  2. OzGuy

    Use of Intrinsically Safe Wiring for a Non-Intrinsically Safe Signal between Two Safe Areas

    Hi, We have an application of sending a non-IS signal between two building, using exiting IS cabling through a hazardous area. I am thinking of using one IS barrier isolator at each end. Typically, in an IS system, there is a barrier isolator inside a safe area. The non-IS side of the barrier...
  3. OzGuy

    Is there an ASME Certified Pressure Relief Valve for two phase fluid?

    Hi, I have an application for a PSV on gas service where the tube rupture scenario results is two phase fluid (10% liquid & 90% gas). We tend to use a full port pilot operated valve, however vendor has commented that the offered valve is ASME certified for gas service only and not for two...
  4. OzGuy

    Maximum uncertainty if the straight run for an orifice plate flow measurement is not observed

    Hi, I am aware that ISO and API have recommendations on straight run requirements of DP flow measurement using orifice plates, but is there a published work about expected maximum uncertainty if such recommendations are not observed, e.g a graph or a table? I have been asked to specify the...

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