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Recent content by cbrock

  1. cbrock

    O-Ring Gland Design - Tolerance Question

    Thank you for your response. This is exactly what I was thinking especially since we are sealing against methane gas. Does material make a difference in meeting the tolerances? We are using 17-4 PH stainless steel. Also, I would imagine that on larger diameters (the 400 series o-rings...
  2. cbrock

    O-Ring Gland Design - Tolerance Question

    I have a question regarding machining tolerances on o-ring glands. When designing a plug style o-ring gland, the Parker O-Ring Handbook (as well as other o-ring manufacturers) base their static seal dimension tables for a pressure of 1500 psi & a 70 durometer o-ring. The design charts give...
  3. cbrock

    Unable to Select Edge to Dimension in Drawing

    Hello All, I have a drawing that I am currently updating. The model required some minor changes in dimensions. After making these changes, I am now unable to select the edges in a detail view of a section view. All edges/lines in all other views on the drawing are able to be selected. The...
  4. cbrock

    Difference between ASTM SA-??? and ASTM A-???

    I have found that some ASME codes specify materials such as ASTM A 105, whereas the material is listed as ASTM SA-105 in other codes. The ASTM SA-105 specification says it is identical to ASTM A 105. Is there any reason why the material is refered to as A105 and SA-105 if it is identical...
  5. cbrock

    Determining Wall Thinning When Bending Pipe

    I would like to determine what the minimum bend radius would be required when bending pipe. The B31.3 code does not specify a minimum radius but does give formulas to calculate the minimum required thickness of the intrados and extrados after bending. Once can back calculate the minimum...
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