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  1. ET50

    Constructed in accordance with...?

    A purchase order came through that says "The system will be constructed in accordance with appropriate ASME standards...." For the purpose of this discussion it is piping per B31.3 and B31.8, however the PO doesn't specifically say that, and the this was intentional by the customer so we...
  2. ET50

    OSHA and ASME compliant belt guard question

    I understand the requirements for a belt guard required for 2 sprockets and a synchronous belt per OSHA and ASME standards. The belt in question is part of skid mounted mechanical apparatus. If this skid has an enclosure (4 sides with doors and a roof) does it still require an OSHA and ASME...
  3. ET50

    API 614 lube oil question

    We have a dry compressor (API 619), and it requires an API 614 lube system (Chapter 3). I say it requires an API 614 lube system because of what API 619 says. If our system will be installed anywhere in North America I'm assuming it will require an API 614 approved lube system since we will be...
  4. ET50

    CRN in Alberta for Pressure Vessel and Piping System

    "Is this going to be a skid? All the equipments will be shipped together on a structural skid?" Yes that is correct, Everything will on a structural skid and the skid will be inside a container.
  5. ET50

    CRN in Alberta for Pressure Vessel and Piping System

    Thanks for the quick and informative responses. The Pressure Vessels we have are less than 6 months old, but the piping has not been fabricated yet. This will be quite the learning experience I believe. Any thoughts on the time frame associated with this if we're starting from zero.
  6. ET50

    CRN in Alberta for Pressure Vessel and Piping System

    It looks like we need CRN certification for a pressure vessel, associated piping, and fittings for a system being manufactured in the USA and being shipped to Alberta. My question is, do we need to have a CRN before fabrication begins or can we certify our vessel and piping system after it's...
  7. ET50

    True Position or Perpendicularity

    Sorry I can't provide a sketch right now, maybe I can describe it better. Imagine a box with flanged connections protruding from it (call them pins if you like). The position of the flanges or pins must be accurate enough for mating flanges or other pins (other assemblies) to mate to them in a...
  8. ET50

    True Position or Perpendicularity

    I have a part that looks like a box with 4 flanged conections protruding from that box. 2 are on one side and 2 are on the opposite side. Pipes with flanges connect to the flanges on the box. Currently the designer has coordinate dimensions locating the flanges with a perpendicularity call out...
  9. ET50

    Quick parallelism question

    Okay and thanks to all. I understand now that where the feature control frame is makes no difference. I will have a tolerance stack up going from one dimension to another however. One dimension is +/- 0.30 and the second is +/- 0.60. Thanks again!
  10. ET50

    Quick parallelism question

    I should clarify my answer above. There are no basic dimensions and no profile callouts, just parallelism
  11. ET50

    Quick parallelism question

    It's a little odd (to me) how they have it called out. What I want is for each surface (1 to the right and 1 to the left)to be independantly parallel to Datum A. I would think the best way is to have 2 callouts, each independant and with it's own dimension from A. The way they have it is a...
  12. ET50

    Quick parallelism question

    Datum A has 2 surfaces parrallel to it. One surface to the right of Datum A, and 1 to the left of Datum A. Should there be 2 seperate dimensions originating from Datum A with 2 seperate parralelism callouts, or can you dimension from Datum A to one surface, and then a second dimension from the...
  13. ET50

    Company changes policy on revisions - is this used by others?

    KENAT, Form, fit function would still get a new part number. What I see as an issue is once a drawing is production released most if not all revisions will be minor, relative to form, fit, function. So why do an Alfa Numeric revision in the middle of strictly Alfa revisions. I see this as...
  14. ET50

    Production Revision Lettering Method

    I'm aware of the standards of revision control, however I have a question as a result of a new company policy. I asked this in the document control area as well but I think this is a more appropriate place to ask this. First our old revision policy was to start with A at the initial Production...
  15. ET50

    Company changes policy on revisions - is this used by others?

    Keeping this simple, our old policy was to use numbered revisions (1,2,3,..) for pre released documents and change to A,B,C... for revisions that were production released. New policy is to keep pre production the same but to have 2 different types of revisions for Production released documents...
  16. ET50

    Welding Flanges to stub connections on Brazed Plate Heat Exchangers

    A co-worker (Engineer) is now attending an ASME class, and he was told by the instructor that the boundry of the heat exchanger ends at the stub ends, and it's then fine to weld flanges onto the heat exchanger without any rework paperwork. This doesn't seem correct but it came from an ASME...
  17. ET50

    Welding Flanges to stub connections on Brazed Plate Heat Exchangers

    gr2vessels, I agree 100% with your assessment. rakuday, I agree with you as well when it comes to the weld issues, and I also agree that the easy way is to have the BPHE's purchased with the flanges attached, however we have a situation where our supplier won't do that, and because our design...
  18. ET50

    Welding Flanges to stub connections on Brazed Plate Heat Exchangers

    gr2vessels, I need to check these heat exchangers again because although they are CE certified I don't believe they had any ASME name plate or marking on them. I'm not sure if this matters or not because ultimately the entire system with the Brazed Plate Heat Exchanger in it, must meet PED...
  19. ET50

    Welding Flanges to stub connections on Brazed Plate Heat Exchangers

    I hope this is the right place to ask this question. If you have Brazed Plate Heat Exchangers that are CE approved (meet ASME requirements), and they are supplied with stub connections, can flanges be welded on these stub connections legally per code(s) or do they require additional testing and...
  20. ET50

    "R" Stamp required or not?

    GTAW, In the original post I mentioned it was "U" stamped. It was manufactured in California and could literally be in sevice anywhere in the world so it is also PED certified. It's final destination is determined when assembled into the system after an order is placed. Anyway this subject is...

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