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  • Users: CadLady
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  1. CadLady

    pipe intersection template

    I need to do a layout so that we can match two pipes together. I need to give the shop a template for the cuts in the pipe. Does anyone know how to make the cutting template? The pipes will be at 45 degrees from each other.
  2. CadLady

    looking for tubing material

    Does anyone know where I can purchase the following tubing material? qty (1) 5/16" OD x 0.035" wall x 75" long, DOM tubing, steel. qty (1) 1 1/16" OD x 0.065" wall x 70" long, DOM tubing, steel. I would need mat'l. certs also. Thank you. Pauline Drozeski McShane Welding 12 Port Access Road...
  3. CadLady

    Help writing FOR Loops

    I am been trying without success to transfer the following BASIC program into a Mathcad file. I have problems with the FOR Loops. Can anyone help me? The program is as follows: 50 DIM F(10) 100 INPUT "ENTER THE STARTING RECIP WEIGHT ",WT 120 IF RR>0 GOTO 200 130 INPUT "ENTER THE STROKE...
  4. CadLady

    Blowdown piping to B31.1

    Where in B31.1 does it state the minimum wall thickness allowed for blowdown and blow-off piping used on a boiler rated at 75 psi? A minimum of Sch. 80 pipe is given for pressures exceeding 100 psi, but not for anything less than that. What is the minimum allowed at less than 100 psi?
  5. CadLady

    API 661

    Could someone explain to me what is meant by Section 6.1.7.5: "Positive means (such as a self-centering taper or the equivalent) shall be provided to ensure seating of the gasket in the spot-face recess." I am using a 1" OD x 0.766" ID x .0625" Thk. gasket.
  6. CadLady

    Help with IF statements

    How to I write the following in MathCAD? If Pr >= 0.51 and Pr <= 0.7 then Scf = 2.4 + ((Pr-0.51)^3 * (3.82)) If Pr ? 0.70 then Scf = 3.125 + ((Pr-0.7) * (8.25)) Thanks, CadLady
  7. CadLady

    Help with MathCAD and air cooler header calcs

    I have entered the ASME Appendix 13 calculations for a rectangular pressure vessel per sketch 1 into MathCAD. Would anyone be interested in reviewing this document for me making any suggestions for improvements? I would appreciate comments concerning my ASME calculation accuracy, also ways to...
  8. CadLady

    Help with MathCAD document review

    I have entered the ASME Appendix 13 calculations for a rectangular pressure vessel per sketch 1 into MathCAD. Would anyone be interested in reviewing this document for me making any suggestions for improvements? Send me your email address and I will send you my file. CadLady10@aol.com
  9. CadLady

    air cooler header

    I would like to learn how to calculate an air cooler header that is made from a solid block instead of plates welded together. The block is drilled for the plugs and tubes with intersecting holes for the gas flow to the various tubes. I need to know that the header size will withstand the...
  10. CadLady

    Section 8 Div 1 Appendix 13 question

    I am trying to work through the example in Sec Vii Appendix 13 , section 13-17, ligament efficiency of multidiameter holes in plates. I can not figure out how the k value of 1.82 was arrived at. Any help would be appreciated.
  11. CadLady

    mathcad evaluation calculation question

    How do I write the following in MathCAD: c = the larger of X or (t-X)
  12. CadLady

    compressor pulsation levels

    I have the following information. I am trying to find how the pulsation levels at the compressors flanges were derived. suction flange info suction pressure = 16.83 psia discharge pressure = 53.23 psia ACFM = 117.12 Cp/Cv = 1.26 Sonic velocity of the gas = 989 ft/sec Cylinder bore = 7.5...

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