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: *

  1. vesselguy

    API 620 Storage tank Design Calculations

    Zain, You can learn about the basics of the principles behind APi620 design calculation by reading one of many reference books. You don't need to be a specialist to do a pressurized tank design: All you need is basic engineering fundamentals and read API620. Interesting to note a response that...
  2. vesselguy

    Field Hardness Testing - Experiences?

    Metaljon, Pardon my ignorance but I would like to know what do you mean when you say "pin brinell"? What is that? You don't mean doing microhardness testing such as Vickers, do you?
  3. vesselguy

    Impact testing of Wear Plates

    All parts welded directly to the shell/head needs to be of the same grade and material as the parent shell/head. Hence if a new vessel is PWHT then the entire vessel except for the 'attachments' shall be completly PWHT together.
  4. vesselguy

    Indian Engineering Firms

    I can attest to the good quality from Larsen & Toubro in India. In my past I had worked with them on 8" thick Div 2 vessels and they were OK. Like everything, you must include enough money to go there to QA their work and have good technical kick-off meetings to ensure they understand what you...
  5. vesselguy

    PWHT of API Tank Shell Nozzles

    I read this with interest. I don't think everyone has replied completly to tankerator's question. Assuming his nozzle is not a flush type. So, if he chooses to use a repad and his shell insert plate of Group I,II,III/IIIA is less than 1" thick, and the nozzle is not larger than 12", then he...
  6. vesselguy

    Meaning of new definition of th in F.4.1

    Hi, The new Addendum 2, Appendix F.4.1 for the max design pressure, definition for the participating roof thickness to now include some kind of composite roof. I have never seen a "stiffened" roof plates as described in the new text. What exactly are they refering to? All the self-supported...
  7. vesselguy

    Bottom plate thickness

    There is no calculations for the bottom plate. The floor is just a min of 6mm as good practice. However, if you actually mean the annular ring then according to a text book I read long time ago clarified that the annular ring is sized as a cantilevered beam (fixed at the bot shell to ring...
  8. vesselguy

    Mistake in 5.10.2.6?

    Yes, I just downloaded the new addendum 2 and noticed that just about every pages has revision lines on them. This is just like Mickysoft softwares: rush to get it out and fix it later with patches! This tanks standard used to be so simple to understand and use. Now, it is turning into a...
  9. vesselguy

    Mistake in 5.10.2.6?

    Thanks for the info. I did not know they came out with Add 2 already.
  10. vesselguy

    Mistake in 5.10.2.6?

    Hi, I went to API's web site looking for errata for the 11th Ed, Addendum1, but found none so I thought some of you might be able answer this simple question. I think there is a typo in 5.10.2.6, first paragraph. I believe the last sentence was meant to say "When a Purchaser....a frangible...
  11. vesselguy

    Insulated longitudinal baffle

    Am I to understand that it is typical to spray on an insulating coating as the mean to make an insulated baffle? On a F-shell with fixed baffle and a removable U-tube bundle, I can see the sprayed-on coating could be damaged during extraction/insertion.
  12. vesselguy

    large L/D ratio HX sizing

    Thanks to both for your input. I should've qualify that my question is pertaining to a fix tubesheet design, hence no pulling of bundle. I agree with moltenmental about limiting removable bundle to 20'. gr2vessels brought up a good point which I did not thought of. large L/D shell can have...
  13. vesselguy

    large L/D ratio HX sizing

    Hi all, Are there any negative issues that I should be aware of in regards to slender HX, ie., shell length is much greater than diameter, lets say L/D > 5. I have no concern with thermal design for long and slender hx shape but from a mechanical perspective, too long and slender a vessel the...
  14. vesselguy

    Insulated longitudinal baffle

    I have worked on F-shells with fixed and removable longitudinal baffle but have never seen an insulated baffle. Can anyone explain or direct me to a site with a drawing or photo to show me how this “insulating” feature is done? Is it by an air gap between two welded plate spaced 3mm apart or...
  15. vesselguy

    adding N2 blanket to tank

    If your tank is not anchored and you have an internal pressure then your shell might be subject to uplifting with or without additional wind uplift loading. You must do the calcualtions to check this otherwise you will damage the bottom shell to floor weld and then you're in big trouble...
  16. vesselguy

    Low NPSH pump

    I have a similar low NPSHA water pump application and Operations keep saying they don't want vertical canned pump but can't give me any good reason other than "bad maintenance". Typical operator response without any good technical input on the source of the problem. I too would like to know...
  17. vesselguy

    changes from API610 10th to 11th

    Thanks to the replies. Yes, 11th is out and I just got a copy today at the office. I'd review it next week but would've been nice to have a quick summary from API or somebody like that...
  18. vesselguy

    changes from API610 10th to 11th

    Hi all, I looked in API's web site and could not find any information on what changes occured in API610 from 10th to 11th ed. Can anyone suggest where I can find a quick summary to review. I do not have the 11th ed yet but just like to get a heads up. thanks.
  19. vesselguy

    base material hardness testing requirement

    In sour service,the typical practice is to confirm parent metal hardness before acceptance of plate or pipe product. MR0175/ISO15156 7.3.2 provides for this but does not specify where and frequency of hardness testing. For plate product (this would include ESW pipe product) my memory...
  20. vesselguy

    max serviceable temp for mineral wool insulation

    Hi, I have seen insulation specs calling out mineral fibre insulation per ASTM C547 and C553 for service up to 450°C since the 80s. Now, I read one EPC's spec on insulation saying mineral fibre insulation shall only be use up to 230°C because the binder in the insulation will break down above...

Part and Inventory Search

Back
Top