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Recent content by Hush

  1. Hush

    API 6A & Elastomer Seals to Atmosphere?

    Yes an acme connector with an elastomer seal meets the requirements. Unless 6A specifically says you can't do something it's fair game. On the other hand, local regulations or best practices might impose other requirements. In the next edition of 6A they will include a top connector just as you...
  2. Hush

    Clarification on US and Canadian Engineers

    Just to try and clear one thing up, there appears to be a misunderstanding on whether there's an industrial exemption in Ontario, there isn't leastwise not the same as in the US. Every province in Canada has a similar clause to the one referred to. I've heard it referred to as the millwright...
  3. Hush

    Clarification on US and Canadian Engineers

    Contrary to popular belief Canada does quite well in the field of electronics engineering. Listed among the world leaders in some high tech areas such as aeronautics, flight simulators, fuel cell technology, telecommunications, satelite electronics, etc. etc. Where we fall down is in the mass...
  4. Hush

    Clarification on US and Canadian Engineers

    Nortel
  5. Hush

    17-4 Corrosion

    I had the gas nitride experience with 410 some years back, the stuff was pitting on the shelf within a week so I've already checked with the heat treater and looked at some stock, definately liquid nitride. Did PMI, definately 17-4. The part is a bare stem hanging out over the edge of a...
  6. Hush

    17-4 Corrosion

    We have some equipment which has corroded faster than expected and I wonder if anyone might be able to provide some insight? Matl: 17-4PH H1150 HRC 28 with a liquid nitride treatment Exposed to atmosphere on offshore platform in warm climate. Severely pitted/corroded within 4 months. We have...
  7. Hush

    H2SO4

    How about using a ceramic/polymer composite coating?
  8. Hush

    Air pressure test in API 6D

    I know some users such as Shell, BP, Gazprom, & Exxon have data because I've had to submit equipment for testing. Whether it's published for public consumption is another matter.
  9. Hush

    The American economy will remain strong because....

    I took a course in macroeconomics in school, all I remember from it is I was bored silly. So my view point is simplistic, ignorant, and probably flat out wrong but here goes anyways. Strikes me that some of the most spectacular economic failures have been at least partially due to isolationism...
  10. Hush

    Valve Seat Damage Testing

    We test some of our gate valves to cut braided wire. I've never been able to find a standard test, we basically stick a piece of wire through the bore of known size and strength and shut the valve then evaluate the results. You could do the same thing with wire or rod of varying size and...
  11. Hush

    tensile tests

    greybert, You want to get your specimens from within the 1/4 T envelope. I.E. the specimen should lie within 1/4 of the thickness from the midpoint or centre axis of the thickest cross section. Since it's a casting, orientation won't matter.
  12. Hush

    Selecting bolt and nut

    A couple more for Metalguy's list Cost Availability Manufacturability (if that's a word) Servicability
  13. Hush

    About tubes.

    You might try API RP 5L8, Field Inspection of New Line Pipe.
  14. Hush

    High Temperature Valve Grease

    I know Sealweld has a lubricant they rate for 2000 F. We use a Desco product rated at 750 F for steam valves. Another manufacturer you might try is CS Clare (sp?).
  15. Hush

    Engineering is Going Overseas - Goodbye Jobs

    EngineerDave has it right but I think a more appropriate term would be entropy - degradation to an inert state of uniformity.
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