Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: BJI
  • Order by date
  1. BJI

    Interpretation/ Abbreviations

    6.11.1 just gives a couple of examples of weld all round, single weld and double weld. These types of documents are never going to be comprehensive enough to cover examples of every possible detail. I agree with you and Christine74, that for the vast majority of cases a single fillet welded all...
  2. BJI

    Interpretation/ Abbreviations

    Because they are two separate fillet welds, which weld all round their respective side of the part/weldment, each individual fillet still starts and stops at the same location, so weld all round is applicable. Please refer to AWS A2.4, 6.11.1 and Annex D6.11.1 Regarding the fillet weld without...
  3. BJI

    Abbreviations

    Could ML be Match Line, this is often used to match details between drawings or views.
  4. BJI

    Interpretation/ Abbreviations

    If the fillet weld size is not shown, you should refer to the general notes for the size of the fillet weld. It is pretty standard practice to have a note specifying 'all fillet welds shall be 6mm CFW unless noted otherwise' or similar. If a note is not included, or a different size is required...
  5. BJI

    U-2(g)(1)(-a) and Appendix 46 of ASME Sec VIII Div 1

    No, refer to UG-16(a). However, I believe it excludes the use of DBA, where rules exist in Div.2 (since this is also the case for Div.2). But, it isn't quite clear whether design rules of Appendix 46 means 46-3 Design by Rule, or the full scope of Appendix 46 which would include 46-4 Design by...
  6. BJI

    Wind load to "BS EN 1991-1-4"

    You are correct about the design life. It is essentially the same, 1/L = 0.02 (for 50 years) multiplied by the lifetime risk, r, to give the annual probability of exceedance. Refer to AS 1170.0 Table F2, Note 2, for the risk values based on Importance Level.
  7. BJI

    Wind load to "BS EN 1991-1-4"

    It is a bit misleading regarding the terminology since the 50 year return period in the Eurocode is the design life, as opposed to the average recurrence interval, which is the time between exceedance of the wind speeds given, e.g. a 1 in 500 year storm event. Regarding the gust wind speeds, I...
  8. BJI

    AS1170.4 Draft

    I don't believe it is just a matter of structural robustness, rather linked to the maximum permitted stiffness discontinuity between levels. Unlike a lot of the other commentaries, the AS1170.4 commentary was updated in 2021 and can be downloaded for free at the following link...
  9. BJI

    general practice of steelmaking of SA-105: fine grain practice?

    A105 produced to fine grain practice and normalized is curve B, not curve C. Since specification A105 doesn't include fine grain practice, A105N will fall under curve A. I believe this was the intent of the VIII-1 update, assuming this is the appropriate design and construction code. Rather than...
  10. BJI

    general practice of steelmaking of SA-105: fine grain practice?

    This should be the general notes to Figure UCS-66(e) as per my original post.
  11. BJI

    general practice of steelmaking of SA-105: fine grain practice?

    @r6155, UCS-66(e) applies to all material assignment notes. It simply provides a reference to fine austenitic grain size, as required under note (2)(a), to use curve B for A105N material. It doesn't matter if it is a plate specification or not.
  12. BJI

    general practice of steelmaking of SA-105: fine grain practice?

    Could be worth posting on the 'Metal and Metallurgy engineering' forum regarding the FG processing practice, assuming grain refining elements are not used. Control of the Mn/C ratio with normalization might be sufficient.
  13. BJI

    general practice of steelmaking of SA-105: fine grain practice?

    There is no requirement for fine grain practice in SA-105, 2023. You would have to specify in the PO for testing to determine the grain size. Figure UCS-66(e)(2) refers to SA-20, whereby SA-20 8.3.1 should give you the relevant information. Elsewhere in the world ISO 643 may also used. It may be...
  14. BJI

    Design code of coils in Fired Heaters

    If there is a pressure vessel involved then that would change things. I was under the impression it was a piping system routing through a ventilated heater enclosure, like reformer piping systems. In my experience these have always been to B31.3 supplemented with API 530. One issue in...
  15. BJI

    Design code of coils in Fired Heaters

    In my experience they have always been designed to B31.3 and API 530. If you follow API 560, it will refer you to B31.3 and API 530 as appropriate. I would consider the thickness design to API 530 suitable to cover the B31.3 exclusions.
  16. BJI

    Water Tank Strain to Stress

    In my experience the intent is to avoid cracking of concrete tanks, and typically admixtures are required to achieve this. Even lining will fail if you don't suitably mitigate cracking.
  17. BJI

    Ring type joint hardness vs flange hardness

    If you really want less deformation of the flange groove, you could machine out and weld build-up / overly with a higher alloy around the groove, then finish machine the groove. Regardless, of the achieved hardness of the flange, it will likely make limited difference to the overall performance...
  18. BJI

    adequacy of all gaskets considering potential buckling of the outer centering or inner ring(s) and

    This is not a trivial exercise, since you are well above what I would consider the maximum permitted temperature for most gaskets. You should consider isolating the joint from such extreme temperature. Some data sheets might suggest you can get facing materials that are suitable for this...
  19. BJI

    Nozzle attachment with shell/head

    Probably also worth stating that UW-16.1 only provides some acceptable types of connections, it doesn't exclude other types of welded connections not explicitly listed. There is no detail provided for a shell connection through a jacket. Appendix 9, 9-6 would only refer back to U-2(g) IMO...
  20. BJI

    Nozzle attachment with shell/head

    You may be able to use the below interpretation to indicate intent, since it is internal to the jacket. The fillet is not required for reinforcing and the nozzle is stayed by the jacket. The external fillet on the jacket conforms to UW-16.1...

Part and Inventory Search

Back
Top