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Recent content by SJones

  1. SJones

    Welding Procedures Specifications(WPS) for Beveled Tee-Joint

    What does the applicable fabrication specification say, either directly, or by reference to another welding procedure qualification standard? https://www.iso.org/obp/ui/#iso:std:iso:15614:-1:ed-2:v2:en
  2. SJones

    2205 Duplex stainless steel maximum sub zero temperature

    They can, but you are entering the realms of extremely tight quality control, and fracture mechanics. It has to be very worth it to go there.
  3. SJones

    Technical Opinion on SS304 Potable Water Line Leakage

    1. Incorrect materials selection: 304 didn’t stand much of a chance 2. Cut and replace 3. Select a more appropriate grade - applies also to 2, and adopt tighter welding and hydrotest practices
  4. SJones

    Is intergranular corrosion test required for duplex steel

    Look at the scope of ISO 17781 in the link above ☝️
  5. SJones

    Is intergranular corrosion test required for duplex steel

    This may help: ISO 17781
  6. SJones

    Hot Dip or Cold Galvanized for Stud bolt in Piping

    @LittleInch - don't forget, they are "asking for a friend";)
  7. SJones

    Hot Dip or Cold Galvanized for Stud bolt in Piping

    Spin dip ASTM F2329 tends to give better results. As you mention “Petrochemical” watch out for flange temperatures.
  8. SJones

    Practical Implications of Impact Testing

    Try a Google search on “Review of the effects of steel composition and heat treatment on Charpy energy toughness”, or try a variant prompt in your bot of choice. It’s not really a question of ‘expectation’ rather one of ‘verification’
  9. SJones

    Welding of duplex SS pipe 30 "

    https://www.imoa.info/download_files/stainless-steel/Duplex_Stainless_Steel_3rd_Edition.pdf
  10. SJones

    Tangential Radiography of 16" pipe

    @DekDee - the technique under discussion is tangential. The 115 mm comes from the formula in ISO 20769-1, i.e along the pipe wall, as opposed to straight through.
  11. SJones

    Tangential Radiography of 16" pipe

    The penetrated thickness is around 115 mm. For Se75, ISO 20769-1 recommends a maximum penetrated thickness of 55 mm for a basic technique, and 40 mm for an enhanced technique. Digital techniques may extend the recommended penetrated thickness. As to whether such techniques could give the...
  12. SJones

    Bored, cased pipe cathodic protection

    Some recent thinking
  13. SJones

    Chloride criteria in MR0175/ISO 15156-3 for austenitic stainless steels

    @wk Taylor - things have moved on a little in the 29 years since that book.
  14. SJones

    Wer H2S at elevated temperatures debate

    Their rules. Their problem if it doesn't work out. I'm not really a downstream afficionado, but I would get Technical Safety involved as to their view on relying upon an operating procedure to create inherently safe conditions versus picking a material with resistance to the failure mode.
  15. SJones

    Wer H2S at elevated temperatures debate

    Is it not recommended to work on the max operating conditions. Until the process safety system settings are finalised, the max operating conditions will be guesswork too. It will also depend on the risk tolerance of the assessment in terms of the expectation of how rapidly the damage mechanism...
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