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  1. Narbij

    Body Flanges on Columns

    @shvet: Thank you for sharing your experiences. I make it a point to climb the tallest structure I can safely at any facility I have worked at to get photos - indeed, I have learnt, first hand, that metal structures look far more rigid on paper than reality. This comment pretty much settles it...
  2. Narbij

    Body Flanges on Columns

    @FMJalink: Thanks for the thoughtful response. Indeed, these flanges are being proposed purely for ease of installation - to me, this not a good reason when welded is practical (I.e., ship in 2 pieces, weld on site and erect OR erect and weld in-situ.) There is indeed risk of corrosive attack at...
  3. Narbij

    Body Flanges on Columns

    Thank you Cristine74 and SnTman, for your thoughts. @Christine74: appreciate you confirming the fear is real. @SnTMan: you seem to have provided your thoughts based on the shape (i.e., long and skinny.) What about that shape drives the caution against bolted joints? Thanks.
  4. Narbij

    Body Flanges on Columns

    Hi Community, We're looking at installing a tall, skinny trayed column - 36" ID X 140' lg. (including skirt.) DP@DT: 65 psi @ 350 deg F. Sour service. ASME Section VIII-1 is the design code There are logistics issues with moving something that long as one piece so body flanges have been...
  5. Narbij

    Hydro after welding Pipe Supports

    Thank you kindly for your responses. LittleInch: I had found that clause shortly after I posted the question - glad to see you validate it.
  6. Narbij

    Hydro after welding Pipe Supports

    Hello Community, I'm hoping someone can help resolve this: Question is: For ASME B31.3 Process Piping - do I need to rehydro after welding a pipe shoe (sliding support) on? Material is Carbon Steel. My initial thoughts are: "no, because it is not a pressure retaining weld;" however, it does...
  7. Narbij

    Baffle Material for Stainless Steel Tube Bundle

    Thank you all for your inputs. 1) EdSTainless: I did some more digging onsite, and in speaking with the Chief Inspector, found out that this was definitely a warranted concern - he had three examples where precisely this occurred. Thank you immensely for cluing me in here. 2) THERMAL...
  8. Narbij

    Baffle Material for Stainless Steel Tube Bundle

    EdStainless: That's an interesting thought...I had not considered that. Indeed this particular HX is quite prone to vibration as well... I'll take another look at the photographs from the inspection reports. Thank you kindly for chiming in with that.
  9. Narbij

    Baffle Material for Stainless Steel Tube Bundle

    SnTMan: Thanks for responding. Erosion/corrosion issue is on the shellside. The existing CS baffles are fine though...however the existing CS tubes are suffering impingement damage from amine carryover, hence the change to SS. For a relatively small HX, you're probably right about the...
  10. Narbij

    Baffle Material for Stainless Steel Tube Bundle

    Hello Metallurgists, I have a Shell and Tube heat exchanger with U-tube bundle for which I'm replacing the bundle. Shellside service is ethane. Tubeside service is condensing steam. All material for original exchanger is Carbon Steel. For the replacement bundle, I'm replacing it with a 316...
  11. Narbij

    PVRV Set Points for Atmospheric Tank

    Thanks EmmanuelTop and LittleInch for sharing your understanding with me and educating me. Greatly appreciated.
  12. Narbij

    PVRV Set Points for Atmospheric Tank

    Agreed. Section 6.1 points me to API 2000. API 2000 doesn't say if it can be set at Design Pressure or it has to be below it. The only thing API 2000 mentions is in Clause 3.6.2.2 which states that "it is often necessary that the set pressure be lower than the design pressure..." but this...
  13. Narbij

    PVRV Set Points for Atmospheric Tank

    Thanks EmmanuelTop. Annex C, Table C.1 is for Emergency Venting. I apologize for my lack of precision - I was talking about a PVRV for normal in-breathing and out-breathing - Annex B, Table B.1 of API 12F is the applicable table. Thanks
  14. Narbij

    PVRV Set Points for Atmospheric Tank

    Hello community, We have some "rig tanks" on site we use for temporary storage of liquids when cleaning our process tanks. We have used these tanks for years - I suspect they are API 12F tanks (pending confirmation). Assuming they are API 12F tanks and Design Pressure is 1 psi (16 osi) - the...
  15. Narbij

    Using Butterfly Valves

    That's actually a pretty good idea LittleInch. I will investigate this. Does anyone have any experience with this?
  16. Narbij

    Using Butterfly Valves

    gerhardl: I have and am pursuing exactly that. The space constraints pushed me to look for other options (or at least, not eliminate options due to inexperience) but it seems that we may be able to make the 6" w/ reducer and pup work - my piping designer is awesome. Thanks again. JA
  17. Narbij

    Using Butterfly Valves

    Thanks zdas04 and gerhardl. Appreciate your responses and input. I checked out some suppliers and it appears that metal-to-metal seats or not that uncommon; however, a 5" with metal-to-metal IS uncommon. I guess I will make the ball valve work. This isn't an application where we are willing to...
  18. Narbij

    Using Butterfly Valves

    Hello Community. This is an excellent site which has helped me tremendously when researching potential solutions. This is my first post however, and am looking forward to many more. I am a Mechanical Engineer who has dealt with a lot of various types of equipment but have limited experience...

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