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  1. DRE111

    Killed steel vs. Cast WCB

    Thanks to both Metalmeister and Zulsaid. Seems that the bottom line is the term "killed" does not really apply to castings. Everything I've read says "Killing" is strictly deoxidation through chemistry manipulation. I also, see now that ASME B16.34 shows A516, Gr. 70 as an equlivalent...
  2. DRE111

    Killed steel vs. Cast WCB

    I have a customer who wants confirmaton that ASTM A216, Gr. WCB is fully killed steel. I can only find the term "Killed" steel in reference to wrought of forged material. Even ASTM references killed steel only when looking at plate specs like A516 but no mention of it in casting spec.s like...
  3. DRE111

    True Stress/True Strain Data for Polymers

    I'm looking for true stress vs true strain into the plastic range for FEA modelling of PTFE, UHMWPE, Nylon, Delrin and other seal materials. Anybody have a good source?
  4. DRE111

    High Temperature bolts for valves

    Looks like your client is looking for a valve that is fire tested in accordance wth API-607. This is a pretty standard offering for refinery valves. The test holds the valve in an 1800 F fire for 30 minutes at pressure. Then the valve is quenched with water and tested at 75% of the max...
  5. DRE111

    Floater ball valve

    I'd call the valve manufacturer since you don't know the design compression for the gasket and that makes it difficult for you to assess whether it's correct or not. Properly tightened body joints should be designed to handle loads transmitted by the piping, pressure, and vibration and so they...
  6. DRE111

    Looking for a Foundry that poors C5 /C12 steel

    Gustorf & Casteel1, Thanks for the help, I'll forward this to our purchasing guys for vetting.
  7. DRE111

    Looking for a Foundry that poors C5 /C12 steel

    Does any one know of a foundry that poors radiograph quality castings in ASTM A-217, grades C12 and C5? This is Chrome-moly steel and the castings I'm looking at are fairly big stuff, maybe 5000 - 10,000 Lbs.
  8. DRE111

    Flange facing of Check valve

    ASME16.34 only calls out the B16.5 flanged fitting requirements for valve flanges. B46.1 is a spec on characterizing surface finish, and API-594 is a check valve spec. 3.2 - 6.3 micrometers (125 - 250 micro inches) Ra with concentric or spiral serrations is the standard flange facing called...
  9. DRE111

    Low temp impact toughness of cast carbon steel

    Metengr, Thanks for the info. I knew it was a long shot to find data this specific but since NDT and Charpy vary with heat treat condition and carbon content it's difficult establish a relationship with out some more specific data. Thanks, again.
  10. DRE111

    Low temp impact toughness of cast carbon steel

    ASME allows the use of A216, Gr. WCB in the Annealed condition down to -20 F without a min. Charpy energy value, however, the Pressure Equipment Directve (PED) requires 27 joules minimum at minimum operating temp. I have some data for the normalized, quenched and tempered, and annealed...

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