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  1. Gilmiril

    Rockwell Hardness Callout

    ASTM E18-15, Standard Test Methods for Rockwell Hardness of Metallic Materials, contains the following:
  2. Gilmiril

    ASME Y14.41-2012 - Nominal Dimensioning Value

    That concept would normally mean that the hole will be modeled at the nominal size of the standard drill bit, so if the drill bit is 3/16", then the modeled size would be .1875 or .188 or .19 (depending on decimal precision) regardless of actual hole tolerance. But I can't see how a 3/16" drill...
  3. Gilmiril

    Hydrostatic shell test pressure

    Ask your client if you can elect to use the 538C pressure rating instead--that way you can test at 1.5 x 1.4 bar or just 2.1 bar! Your client clearly does not understand ASME pressure classes, which have different pressure ratings depending on the operating temperature. You may need to explain...
  4. Gilmiril

    Combining Composite and Bidirectional call outs

    The |Ø.010(M)|A| refines the orientation (perpendicularity) relative to datum A, so it seems to me that you haven't (yet) refined the hole-to-hole location. Or did I misunderstand what you mean by hole-to-hole location?
  5. Gilmiril

    Question regarding starting point to measure based off BASIC dimensions

    When dealing with profile tolerances, don't try to apply the tolerance to any of the dimensions. Instead, think of the basic dimensions as describing theoretical surfaces, and the profile tolerance then defines the allowable variation relative to these theoretical surfaces.
  6. Gilmiril

    Handy Features to Have on Drawing Templates

    If a calculated weight appears on a drawing, then the reviewer and/or approval need to check that this is correct. Just say'n...
  7. Gilmiril

    Wow- Interesting- CONVERSION

    The 15°F (excuse me, 15F°) was not converted from 8C°. Considering that API traditionally worked in "US Customary Units", it's the 8C° that was converted from 15F°, and that works (15÷1.8 = 8.3... or 8C°).
  8. Gilmiril

    Cylindricity controlling multiple surfaces.

    I'm sure there are other ways to call this out. Maybe a leader note pointing to one surface with the text, "4X SURFACES <CF>"? But even if that's acceptable, I think keeping it with the dimension would make it less likely to be missed.
  9. Gilmiril

    Cylindricity controlling multiple surfaces.

    Call it a "continuous feature". ASME Y14.5-2009 introduced a symbol for this ("CF" is a hex outline).
  10. Gilmiril

    Use of monogram API 6A

    Perhaps we should ask for clarification. . .What dimension was changed? And how was it changed?
  11. Gilmiril

    difference between class and grad

    Ehsan, you're not getting any answers because your question is not clear. API 5L Grade B refers to Grade B material per API 5L "Specification for Line Pipe". As its title suggests, API 5L applies to Line Pipe, but it has nothing to do with insulation. It also does not include pressure...
  12. Gilmiril

    ASME Y14.5 standard for Reference Dimensions?

    The company I work for insists on using REF to indicate reference dimensions. I've given up on trying to convert to ().
  13. Gilmiril

    Flange Dimensions

    I would think that needing flanges smaller than NPS 1/2 is getting into the instrumentation realm, and I'm afraid I'm not much help there. It's typical to use threaded fittings of various types for such small sizes, but I also know there are some industries where threaded fittings are frowned...
  14. Gilmiril

    difference between class and grad

    What design code does the Class 600 refer to?
  15. Gilmiril

    Total Membrane Stress Intensity

    The 2004 version of ASME BPVC Section VIII Division 2 had the following definitions in its Appendix 4: That Appendix 4 (Design Based on Stress Analysis) was based on the Maximum Shear Stress Theory of Failure which predicts failure when the maximum shear stress exceeds one half the yield...
  16. Gilmiril

    allowable stress

    For ductile materials, there really shouldn't be a difference between the two. But for non-ductile materials, the allowable tensile stress would be lower than the allowable compressive stress, so the differentiation is necessary.
  17. Gilmiril

    Flange Dimensions

    U123d, Where in the world did you learn that B16.5 does not cover sizes below 2 inch? In fact, the 2013 version covers sizes of NPS 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, and 24. The previous thread you linked deals with a completely separate issue...
  18. Gilmiril

    LWN inside standard diameter in NPS higher than 12 INCH

    As far as I'm aware, "Long Welding Neck" flanges are not actually covered by any standard. So when that catalog from Friulana mentions ASME B16.5, they are only meaning that the actual flange geometry meets that standard. ASME B16.5 is very explicit about what it covers, and it only covers...
  19. Gilmiril

    Difference between lbs and class#

    Historically, both "lbs" and "#" have been used synonymously to mean "pound", so there should be no difference between 600# and 600lbs. Likewise, there is no difference between 150# and 150lbs. But if you requested 600lbs and were offered 150#, you need to get an explanation from the vendor...
  20. Gilmiril

    Electro-galvanisation Electroplating tolerances

    I have to second that. You're looking for process details, and the only reliable way to get what you need is to directly consult with the experts in that field. So you really need to talk to the plater and get their opinions and recommendations. You also need to be very clear on the...

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