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  1. komposites

    Forging pressurized parts

    Thank you all for your guidance and suggestions. I am learning the ASME Code, which is clearly not a trivial task. It has a learning curve which I will overcome, just as many of you all have. Your comments help me target the information I am looking for, and give me a perspective of what has...
  2. komposites

    Forging pressurized parts

    Thanks for the responses so far. Let me clarify my post. doct9960 is on the right track. I am following Section X (FRP tanks), which requires design and fabrication of any metallic parts per Section VIII-division 3. I kept the question simple in hopes of more responses, which is why I only...
  3. komposites

    pressure vessel

    Sounds like an interesting challenge. It probably requires substantial engineering. You can probably learn a lot from existing designs that already have solved this problem. For example, I have used this stirred reactor in the past, which operate at a similar temperature and pressure. Link...
  4. komposites

    Forging pressurized parts

    Forum, I believe the correct path is to buy the rough shaped part to SA-965 as a forged part based on my interactions with a forging shop. It looks like they can outsource testing that is required. Does it appear like I'm on the right track? I'm a bit new to ASME code requirements. Thanks.
  5. komposites

    Forging pressurized parts

    I want to fabricate a metallic polar boss, which I would classify as a nozzle (large diameter) for a Section 8, Division 3, high pressure, FRP tank. I want to make sure that I have the proper material cert for my inspector. I want to make the part out of 316 stainless round bar (probably SA-479...
  6. komposites

    ASME Sec VIII Pressure vessel

    B16.5, Section 5.1 states "Materials required for flanges and flanged fittings are listed in Table 1A with the restriction that plate materials shall be used only for blind flanges and reducing flanges without hubs." I have a related question to ask The Forum. If this was a custom flange (not...
  7. komposites

    Forging parts to net shape for ASME pressurized components

    Forum, I'm looking at SA-479 for annealed 316 round bar to machine a nozzle. It is approved in section 8 (div3) and section 2. If I were to take this material and have it forged to near-net shape, then does that require the material to be recertified to SA-336 as a forged part by the forge shop...
  8. komposites

    Forging parts to net shape for ASME pressurized components

    Forum, When hot-forging a pressure-bearing part out of ASME spec'ed SA-### steel material (like Round bar), does the ASME BPVC require the ASME Fabricator to gather any particular inspection data, heating data, or additional material testing? When hot-forging, it's basically similar to a...
  9. komposites

    Stainless steel from China or India - ASME BPVC Section II or VIII

    Thanks for the comments. If there are more comments, feel free to keep discussing. Therefore, in summary: 1) Yes, there are Chinese steel suppliers that can cert to ASME. Purchase to ASME requirements. Try to screen reputable sources. 2) No equivalency to other specs. Only buy to the ASME...
  10. komposites

    Forging parts to net shape for ASME pressurized components

    Question about ASME BPVC pressurized components: Are there additional ASME requirements, if I were to take SA-### certified Steel Bar, and have it forged to net shape, then post-machined? Do I have to do some additional testing? For example, there are additional requirements in VIII, Div-3, KF-6...
  11. komposites

    Stainless steel from China or India - ASME BPVC Section II or VIII

    Hi Forum, I'm looking for some definitive information on whether stainless steel from China or India is permitted for use on ASME Pressure Vessels and Components per ASME BPVC Section II and VIII. For example, getting a S.S. Plate from China and machining a pressure vessel part from it. After...
  12. komposites

    301 Stainless for use in ASME Pressure Vessel

    Hoping one of you could help me out. I want to make a pressure vessel component out of stainless, and need to make sure it is ASME compliant. I was looking at the list of stainless steels covered by an SA or A spec in the ASME BPVC Section VIII, and it seems to exclude 301 (UNS#S301000, EN#...
  13. komposites

    ASME Requirement for Resin Testing (Mandatory Appendix 8) for Composite Pressure Vessel

    Hope I get a hit this time. In summary: I am hoping that someone can explain what "certify" means in context of ASME definition and what I posted above. Secondly, can I use the resin manufacturer's epoxy equivalent wt% to "certify" to ASME? Any reply would be appreciated.
  14. komposites

    ASME Requirement for Resin Testing (Mandatory Appendix 8) for Composite Pressure Vessel

    I'm looking over the ASME BPVC, Mandatory Appendix 8 for Class 3, Gas Hydrogen Vessels (Carbon Fiber Pressure Vessel with Plastic Liners). I have a question on the epoxy resin requirements. 8-300.4.1b (RESINS SYSTEM-MATERIAL REQUIREMENTS) states that "resin supplier shall CERTIFY, for each...
  15. komposites

    Large rotomolded parts. Recommended manufacturers.

    Hi Forum: I need to have an approx 40 x5 x5 ft part rotomolded from a standard thermoplastic. I believe this is pushing the fabrication capabilities of most facilities. I probably need the mold tool made for me as well. Thanks in advance for the advice. My first post. Questions: 1) Can anyone...

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