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  1. scotty36

    316SS stub-in to CS pipe @ 400degC

    Has anyone used a "hydratect" fitting before? It is a level switch used for steam service. The physical connection relies on stubbing the fitting into the steam header. The problem is that the only option offered by our vendor is 316SS and our header material is CS. We used a 309L electrode...
  2. scotty36

    SS stub-in to CS pipe in steam service

    On the advice of a Vendor, we have welded a 316SS piece (essentially pipe) directly into a CS header pipe (DN300 Sch 40) in temperatures operating up to 400degC. Using a 309L electrode. When we do our finite element analysis of the junction, we see yeilding (at operating temp) local to the...
  3. scotty36

    Warm-Up Rates for Steam Systems

    Does anyone know of a guide for the warm-up rates for steam systems? I cannot find anything in ASME B31.1 or Spirax publications. I am purposefully not giving details because I am after guidelines not specifics. However, it should be noted that the systems in question are in industrial power...
  4. scotty36

    SS threaded valves on CS piping

    We have specified SS treaded valves to be installed in CS systems on a large sugar project. Many of these are in aqueous service. We were trying to standardise our valves as much as possible. The pressures are minimal and the fluids are non-hazardous. The valves are all less than or equal to...
  5. scotty36

    Vibration Clamp - Hot Belting Material

    StressGuy, I was excited to find your thread as it indirectly answers my question on another thread (see Pipe Supports Near Recip Compression). Could you please advise more about the "strap type clamp" you use? Do you design them/ fabricate them yourself or are they available in the...
  6. scotty36

    Pipe Supports near Recip Compression

    Thank you all for your responses. CB4 (or others), do you have a reference for me to follow up on "friction type restraints"? I should explain that the question pertains to a Natural Gas Pipeline project in its design stages. The compressor is on order and the preliminary layout...
  7. scotty36

    Pipe Supports near Recip Compression

    I have two questions: 1. I am trying to find a supplier of pipe clamps for vibration. There are many clamps on the market that are simply a bent plate. The clamps I am seeking have long lugs for the bolts either side so that they are much stiffer. I have seen these in recommedations by Beta...
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