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  1. Krausen

    Can Service Pressure Exceed Design Pressure?

    As the end-user, you don't label the MAWP of any Section VIII vessel. Only the certified fabricator can label Section VIII vessel MAWP. As the end-user, you can specify the Design Pressure. Design Pressure & MAWP are not the same thing. This is often not well understood by casual users of...
  2. Krausen

    Double rail GMGC - PCC-1&WRC538

    It does not take much bolt stress to seat any kammpro gasket. I'm not sure what you mean by a "double rail kamprofile gasket", but they do make kammpro conversion gaskets designed to seat on only one of the raised edges of RTJ flanges (typically the outer raised edge, see LAMONS conversion...
  3. Krausen

    Vessels Manways

    Per the American Society of Common Sense (ASCS) - Manhole diameter is defined by: 1) An internal diameter everyone can fit thru
  4. Krausen

    Bolts and Nuts for High-Temperature Applications – Ambiguities in European Standards

    What is the design temperature of these bolts you're looking to use? I'm not familiar with ISO standards, but it appears they are ahead of ASME in not allowing above 300 C / 572 F, as MintJulep mentioned. I've never installed austenitic SS bolting on any high temp application I've ever...
  5. Krausen

    Pinhole above bonnet - HF service

    HF acid wormhole through the casting it appears. Very common in HF acid service, although I've seen it more on Carbon Steel castings. Monel castings, as you mentioned, are the issue. A very difficult material to cast properly. Many companies require the M35-1 type Monel casting for this...
  6. Krausen

    Vessels Manways

    Anyone who's ever had to actually enter a vessel manway would never design one to 18". 24" should be the minimum size. This is written in many of the major company design standards
  7. Krausen

    Piping Material Grade Query

    He's talking about the thickness of the weldneck end
  8. Krausen

    NACE Requirements for completely Cladded pressure vessel in severe sour stream

    I've never once spec-ed out HIC-resistant or PWHT carbon steel for the base metal/backing of any sour service vessel with 100% internal SSC-resistant alloy clad/weld-overlay. And I've spec-ed out & installed dozens of these types of vessels. The major companies I've worked for/with have also...
  9. Krausen

    Spacing Between Openings on Pipe Circumference – Limitations?

    It can be dependent on reinforcement requirements of your openings. So you need to know your design conditions & understand your reinforcement areas if req'd. But assuming you do not need your openings reinforced, there is no code requirement for minimum spacing btw openings. But typically...
  10. Krausen

    Bolt Torque and Bolt preload query

    Anyone telling you to tension all your flange joint studs has never worked in a real plant before. Plants will have thousands of studs in hundreds of flange joints needing to be worked, often together in large quantities at the same time during outage/maintenance events. The time it takes to...
  11. Krausen

    High Temperature Gasket Torque

    I believe what the OP means by "hot torqueing" is what PCC-2 calls "start-up retorque". This is done when your process temp first reaches approx 400F immediately after startup. Note your flange bolts will not be at 400F at this time (assuming uninsulated flange joint, which it should be). The...
  12. Krausen

    reinforcing pads as per 13480 or sockolets?

    You can't fully evaluate the sockolet weld to main header with an RT. But you can often still get some idea of weld quality. You can also check for your socket gap after welding if curious. It's not useless to RT sockolet to main header welds.
  13. Krausen

    reinforcing pads as per 13480 or sockolets?

    Using a sockolet is much more common than a repad in this case. The sockolet is an integrally-reinforced fitting. You can still x-ray (RT) the full-pen branch weld to check for weld defects, but yes I don't believe you can qualify this weld via x-ray (RT) or UT volumetrically. Yes, mpi of...
  14. Krausen

    BPVC Div 1 Bolt Load Mandatory Appendix 2.

    Ah yes, welcome to the world of overdesigned flanges, brought to you by VIII-1, MA 2. One quick tip that may be helpful is to use a gasket with lower "m" & "y" values. In other words, ignore the "m" & "y" values shown in MA 2 for gasket types. This is done often with Kammpro type gaskets...
  15. Krausen

    SA-182 VS SA-965 for heat exchanger tubesheets and girth flanges

    This may be true now, I'm not 100% sure. I never deal with SA-105 on tubesheets or girth flanges on new HXs since we're always going with SA-350 to get out of any impact test requirements for our lower required MDMT ratings. I know we have many older HXs that are still in operation with SA-105...
  16. Krausen

    SA-182 VS SA-965 for heat exchanger tubesheets and girth flanges

    No, you can design custom girth flanges & tubesheets to SA-105/SA-350 all day long, so long as you fall under the requirements of the specs. Most carbon steel girth flanges & tubesheets are SA-105/SA-350. I work up North, with low MDMT requirements, so all of our CS girth flanges & tubesheets...
  17. Krausen

    SA-182 VS SA-965 for heat exchanger tubesheets and girth flanges

    Yes SA-182 is very common for SS316 girth flanges & tubesheets (forgings) for HXs
  18. Krausen

    ASME VIII-1 guidance on threaded end cap

    Man...this is dicey. Any reason you can't just make this a flange joint?
  19. Krausen

    Welding on SS and NACE MR0175

    Austenitic SS (e.g. 300 series SS) is inherently NACE-compliant
  20. Krausen

    which valve is it

    It's a ball valve. Looks like 14" 150# (Class 150) ASME/ANSI flanges to me. Interesting they installed the stem in horizontal here with the gearbox on it. May be the way to go to flush out any junk/debris every time it's opened/shut.

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