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  1. MidstreamEgr

    Breakout Tank Testing & the DOT

    Can anyone clarify the DOT code for me on tank testing? In 49 CFR 195.307(c) it indicates that testing for API 650 tanks "must be in accordance with Section 5.2 of API Standard 650". But in API 650 2007 (which is the version indicates in the Incorporated by Reference section, Section 5.2...
  2. MidstreamEgr

    Surge Tanks - when to use?

    I'm not a pipeline person (more inside-the-fence terminal piping design), but I've noticed that some pipeline receipt points or pump stations have surge tanks, and some do not. Not familiar with the pipeline-side of the business, I was curious what drives the decision to use it some places and...
  3. MidstreamEgr

    Hot Acid Piping Materials

    The product is a mix of sulfuric acid, suspended solids (metals), water, and oils. Flow (fps) can be whatever we want, since we're designing a new system - we'll target 8fps max and 5-6fps normal operating. Don't know halide content unfortunately. I like what I've found on PTFE lined pipe...
  4. MidstreamEgr

    Hot Acid Piping Materials

    Looking for any recommendations for research on piping for a low pH hot system. It's ~1-2pH and 180-225degF. They currently use carbon steel and replace spools often, which may be more cost effective than an exotic material. But this has to be relatively standard operation conditions in...
  5. MidstreamEgr

    Vessel offload - increase throughput/bph

    I have a existing terminal with dock, currently offloading at ~1600bph thru a 8" line to existing tankage. I'm looking for a way to increase throughput to reduce demurrage and overall product throughput. My limitation is the ~100psig max at the vessel's connection, so flowrate is effectively...
  6. MidstreamEgr

    Reverse flow / vortexing question

    Thanks BIMR. We're not actually sequentially blending (which each stream is flowing one at a time). It's sidestream blend, which is sub-classification of ratio blending, where the two streams are actively flowing at the same time and combine upstream of the primary meter. The primary reason...
  7. MidstreamEgr

    Reverse flow / vortexing question

    thanks to all! I am investigating vortex/siphon as a potential, and will arrange the operation of the system to avoid the transient cases. I'm considering the check valves, but given that 90% of the flow will be thru the check valve, the 10% ethanol that is a concern it seems wouldn't be an...
  8. MidstreamEgr

    Reverse flow / vortexing question

    Injection is controlled by flow meter and control valve just as the overall flow is controlled by flow meter and control valve, from a centrifugal pump so that flow is always "forward". Bimr, sorry for the confusion but when I said "gas" it's short for gasoline, not gas/vapor. inject...
  9. MidstreamEgr

    Reverse flow / vortexing question

    The ethanol streams are metered, as are the combined ethanol/gasolione streams - which is where the lack of ability to confirm is. For example, if the total flow is 600gpm for each arm (See sketch) --- - 60gpm of ethanol into injection A for meter A - 600gpm at meter A of combined...
  10. MidstreamEgr

    Reverse flow / vortexing question

    I have a system that has two 4" gasoline truck loading-arm metering assemblies fed by a single 6" pump header. Each arm may or may not be operating simultaneously for truck loading. In the 4" branch from the header for each, we are injecting ethanol. This injection is downstream of the common...
  11. MidstreamEgr

    PHMSA/DOT Pipeline Permitting

    I appreciate everyone's input on this. So my take is... there is no formal review prior to construction (except local or state jurisdiction for building, fire, stormwater, etc). The system (breakout tanks, terminal piping, pipeline, etc) must be built according to CFR 195, and that includes...
  12. MidstreamEgr

    PHMSA/DOT Pipeline Permitting

    It's primarily crude and other unrefined petros. It's definitely regulated under PHMSA/OPS. But I can't locate in CFR where there is a review process with PHMSA, or a requirement for documentation/drawings. At least in CFR 195, it talked about that the pipeline must be designed to X, but not...
  13. MidstreamEgr

    PHMSA/DOT Pipeline Permitting

    I have a client looking at expanding an existing terminal (non-DOT) with pipeline in/out. I believe that, given the fact that it will be a DOT-regulated terminal once they start piping into and out of it, any new work needs to be DOT-compliant and would require full design and drawings. I ask...
  14. MidstreamEgr

    Crude Wax Suspension by Mixing in API tankage

    Geesamand, thanks for the feedback!
  15. MidstreamEgr

    Crude Wax Suspension by Mixing in API tankage

    I have an oilfield project, where the crude has a realtively high wax content (5%-30%). I am looking for a way to keep the wax from dropping out while in tank storage and piping to loadout (to rail and truck). I have been reading about eductors (NciWeb.net/tank.htm) and heating systems. I...
  16. MidstreamEgr

    Crude Wax Suspension by Mixing

    I have an oilfield project, where the crude has a realtively high wax content (5%-30%). I am looking for a way to keep the wax from dropping out while in tank storage and piping to loadout (to rail and truck). I have been reading about eductors (NciWeb.net/tank.htm) and heating systems. I...
  17. MidstreamEgr

    Crude Wax Suspension by Mixing

    I have an oilfield project, where the crude has a realtively high wax content (5%-30%). I am looking for a way to keep the wax from dropping out while in tank storage and piping to loadout (to rail and truck). I have been reading about eductors (NciWeb.net/tank.htm) and heating systems. I...
  18. MidstreamEgr

    Convert Distillation to TVP/RVP

    BigInch, i agree and that's what I'm accustomed to (XFRs, etc). But this client has said they might see a lot of light ends due to the upstream process. I've got a distillation curve (attached), and ample other data, but I don't know how to covert or extrapolate a reasonable estimat of vapor...
  19. MidstreamEgr

    Convert Distillation to TVP/RVP

    The lab data is very prolific. I have a full assay on the crude as well as major cuts. It's got (for crude) a simulated distillation curve (D7169) and PONAOX(U) analysis. AS well as the other standard stuff - gravity, viscosity, etc. What I don't have anywhere is any mention of vapor...
  20. MidstreamEgr

    Convert Distillation to TVP/RVP

    I don't have access to the lab, just a report from the lab. I'm a few steps removed from the fluid "owner". Doing terminal/tank farm design on the receipt end.

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