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  1. rachnatbovo

    Post-forming heat treatment(PFHT) for material grade 10H (Duplex & Supper Duplex)

    Dear Sirs Thanks alots for your valuable response. I still concern about Duplex Forming and Annealing: as I mentioned that the fiber elongation is less than 5% for shell/head, which can complicate forming operations. Annealing after forming is usually meant to restore the ductility and correct...
  2. rachnatbovo

    Post-forming heat treatment(PFHT) for material grade 10H (Duplex & Supper Duplex)

    thread794-437308 Hi Sirs, Similar topic I have seen as below link: https://www.eng-tips.com/viewthread.cfm?qid=447480 I still a bit unsure the below: The Head End was cold formed from the plate super DSS( SA 240 32750) 10H, nominal thick 8mm(min req 6.8mm), Fiber elongation was calculated is...
  3. rachnatbovo

    Replacement of same pressure vessel part (HX bonnet) needs only R-1 report.

    R-1 form for the Part or the complete vessel after repairing/alteration? how about the hydrotest & R stamping on the nameplate in case the shell will not in front of Inspector?

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