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  1. MarkCA

    Modifying a Part Description without Up-Revving

    I checked an Inventor 2024 part and drawing into Vault and released it only to then realize I'd forgotten to add a Reference Drawing Number in the AES Model Properties. Is there some way for me to correct this without creating an entirely new revision? Thanks, Mark
  2. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    The blind flange comment stemmed from the Grayloc Hub. If we end up with something like that, we'd be taking apart the Hub not removing the blind flange. That's four bolts not a couple dozen.
  3. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    It doesn't have to be quick opening, per se, though that would certainly be welcome. Mainly it just needs to be durable enough to open and close repeatedly while withstanding the pressure.
  4. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    9-10 inch ID; at least a 6 ft interior length.
  5. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    Actually, I take that part about the blind flange back. I don't think that would quite work the way I was thinking. Anyhow, like I said, that's something we'll have to discuss with the designer.
  6. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    We'll have to discuss that with the designer. Though, just briefly looking at it, something like that could work, in theory. Maybe with a blind flange on one side (assuming it can withstand the pressure and stresses, of course) and the vessel on the other.
  7. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    When I said multiple opening and closings I meant that we would be opening the vessel, placing the test piece inside it, pressuring up and holding for, say, an hour, releasing pressure, opening the vessel and removing the piece, checking/testing it and then starting from the begining for, say...
  8. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    Alright, sorry for the delay. Holiday week and all that. Anyhow, to broadly address the some of the questions/concerns: I had thought that ASME BPV code applied to refineries and not to this sort of project. In retrospect, I don't know *why* I thought that, but there you are. At any rate...
  9. MarkCA

    Design Text Pressure Vessel for Pressure Tests

    I've been tasked with designing a pressure vessel that we can use to run pressure tests on our equipment. I've been looking for a text that covers this topic, but all the ones I've seen on Amazon seem to focus on Pressure Vessels and Boilers for Refineries. Are there any that are specific to...
  10. MarkCA

    Drag Coefficient for a Hollow Cylinder

    Thanks, Greg. I'll give that a try and see how it turns out.
  11. MarkCA

    Drag Coefficient for a Hollow Cylinder

    Whoops! Forgot to mention the cylider is moving through the fluid parallel to its long axis. That is to say that the fluid is flowing through the hollow portion and around the outer diameter.
  12. MarkCA

    Drag Coefficient for a Hollow Cylinder

    Can anyone tell me the drag coefficient for a hollow cylinder through a fluid? The fluid in question is viscous (50+ cP for the purposes of calculations) and incompressible with a density of 1800 kg/m^3. The cylinder is 30.5cm long with an inner diameter of 7cm and outer diameter of 8.9cm...
  13. MarkCA

    API 6D Check Valve Trim

    Thanks very much.
  14. MarkCA

    API 6D Check Valve Trim

    Do you happen to have the paragraph that's from? I can find it, but that would speed things up. I'm not worried about corrosion, frankly, because of the nature of the service. It's about as benign as you can get, but my client is searching for anything and everything to keep costs down and...
  15. MarkCA

    API 6D Check Valve Trim

    Does anyone know the "standard" trim for API 6D check valves? I'm used to B31.3 specs where we typically specify API Trim #8 but I'm being told that is not the case for API 6D valves. Can anyone shed some light on this? (This is for non-corrosive, sweet service.)
  16. MarkCA

    BSI EN 12560-6 vs B16.20

    I have a project that is wanting Kammprofile gaskets for RTJ flanges manufactured in accordance with BSI EN12560-6 but I dont' have access at work to BSI standards and we are required to specify to ASME/API/etc. standards, particularly since this if for a plant in the States. So, I have a...
  17. MarkCA

    ANSI/ASME vs. API Valve Ratings

    I have a project that is asking me about the equivalence between the two but since I always specify valves based upon the ASME standards for pressure and temperature, flange bolting and the like (even if the valve itself is also governed by an API stanard), so I don't have much experience with...
  18. MarkCA

    Pigging Ball Valves

    I was able to speak with one of our vendors and he said that all full port, API 6D ball valves are piggable regardless of seating material. Thanks for the help.
  19. MarkCA

    Pigging Ball Valves

    So the short answer is, "Yes"? The long answer is, "Maybe, it depends"?
  20. MarkCA

    Pigging Ball Valves

    I'm working on a job where the client wants to use ball valves in a pipeline but prefers soft seats, i.e. PTFE. My boss on the other hand is unsure whether or not this is allowable when this line is going to be pigged. He's worried the pig will damage the seats. Now I recall a conversation...

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