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  1. Foxtrap

    Specifying a Welding Procedure

    Howdy all, I am about to write my first welding procedure. How do I start? It is for an Oil Prodution pressure body. Is there any tips about what is my responsibility as the designer and the responsibility of the fabricator. Where can I find help on welding joint design, number of passes, any...
  2. Foxtrap

    Wafer or Lug?

    Hello, I do apologize for being quite vague in my application description but that is mostly due to the fact I was unequipped to ask the questions I needed to know from the client before finding a valve to recommend. I was looking for help in the recommendation but also an idea of what are...
  3. Foxtrap

    Wafer or Lug?

    Is a butterfly valve the way to go? Is abrasive service too hard on the vane and seal seat to be effective without having to replace it all the time? Should I really consider a knife valve? I was looking at previous threads and found one on the knife valve. They were specifically saying "for use...
  4. Foxtrap

    Wafer or Lug?

    I was reading further into valves and there was a note that wafer was not good for between slip-on or threaded flanges because of the possibility of not having a complete seal. I was wondering if because this is a H2S service that it was common to use the lug style? Geosmith: Why is a triple...
  5. Foxtrap

    Can PVC be NACE approved for Sour Service?

    I have a few different types of PVC butterfly valves that I have looked at, but I am unaware of what sour gas does to PVC. Is there a NACE or ISO standard for other materials besides metallic for H2S? Is this a corrosion or cracking issue? Thank you for the help so far.
  6. Foxtrap

    Wafer or Lug?

    Howdy, I am new at picking valves. I don't know if I have enough information to pick the right one. I was asked to find quotes for an 8" butterfly valve, sour-trimmed, air actuated to be used in an abrasive service application. As I started researching them I have discovered some two types of...
  7. Foxtrap

    Can PVC be NACE approved for Sour Service?

    I was told to research butterfly valves to put in a PVC piping system. I was also asked to make sure that the valve was sour trimmed. I never thought that PVC would be able to be used in sour conditions. Is that right?
  8. Foxtrap

    Hydrodynamic Seals, are they all they're cracked up to be?

    Howdy, I am working on a mostly rotating but sometimes static application and, like engineers before and probably always will till the end of time, I am having sealing issues. Unfortunately this is a project I am stepping into therefore am trying to figure out the reasoning of the first...
  9. Foxtrap

    Autodesk Inventor 9 std parts library

    Howdy Lawtonian, The "content center library files" is the storage location for parts that you use from the Inventor library when doing assemblies. They live in database form (like iparts) until you actually create one and drop it into your assembly. To make the actual parts you go into an...
  10. Foxtrap

    GD&T

    Howdy Rookie, I know this may sound strange but it's cheap and I still think it's a good way to go. Check out used bookstores and pick up an older drafting text book. It has some good tips and examples. (Examples are the key) The basics are a good way to start. If you are looking at getting...
  11. Foxtrap

    Creating Drafting Standards

    I have also been asked to write the drafting standards for our company. Although the ASME/ANSI are good standards to allow a drawing to be passed from individual machine shop to another individual machine shop and still be in the same "drafting language" how detailed are anyone's standards for...
  12. Foxtrap

    Vanishing constraints

    Sorry tg, We are using Inventor 9, Vault 3.0. That hasn't happened yet. The only time I get something like that is when I replace a component that isn't exactually the same as the one I'm replacing. Does Inventor give any error message? Fox
  13. Foxtrap

    Using Vault and a Customized Content Library

    Thanks Adam for replying. I've never used Profiles so I don't know the comparison. I actually did some more looking into. What I did eventually end up doing is putting the Content Library database in a folder on a shared network and the parts generated from that database are saved in a Content...
  14. Foxtrap

    Using Vault and a Customized Content Library

    Our company is currently putting all of our Inventor models and drawings into Vault. Just before this I was in the process of customizing the Inventor Content Library to reflect our part numbers that we use for standard fasteners/o-rings/etc.. I put that library into Vault but now when I want...
  15. Foxtrap

    Standards

    Has anyone ever heard of IHS. They are a online company that sell books/technical material(paper and online)on standards. You may also apply for a subscription to browse their document collections. The website is: http://www.ihs.com/index.html. Has anyone used their services before? Waste of...
  16. Foxtrap

    Metric O-ring Size Code

    What is the typical way to specify a metric o-ring? Imperial is 2 or 8 for o-ring or backup and then the series #, is there a way that you do this for metric ones?

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