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  1. Awais Arshad

    ASME VIII-2 & AD Merkblatt : Choice of Code for Heat Exchanger Ordering

    Hi all and Happy New Year, Though design philosophies of Codes (especially for Tubesheets in case of HE Design) differ and cannot be cross-compared, given an option to select AD Merkblatt and ASME VIII-2, I seek suggestions on the selection for an exchanger to designed, manufactured and...
  2. Awais Arshad

    Compatibility of Spiral Wound Gasket (SPW) with Flanges having Different Surface Finish

    Thank you for the response. I couldn't catch up in time due to some personal reasons. Inner ring could not be ordered due to geometry constraints. However, we resolved the issue by replicating design of a fellow company having similar geometry and service - upon their consent.
  3. Awais Arshad

    Compatibility of Spiral Wound Gasket (SPW) with Flanges having Different Surface Finish

    Hi all, We have a case where the mating flange has different surface finish compared to the top flange; one flange has a surface finish value of Ra 3.2-6.3 um, while the other has a surface finish value of 1.6 um. As per my literature research, the SPW gasket works find under such...
  4. Awais Arshad

    Effect of Tubesheet Thickness on Girth Flange Design

    Hi all, I am new to HEX design and that too using AD Merkblatter Code. Using AutoPipe Vessel, I designed a custom weld-neck flange per B7 & B8 for my BEU exchanger. Subsequently, I designed tubesheet per B5 (6.7.3). From the report generated by AutoPipe Vessel and further delving into...
  5. Awais Arshad

    Effect of Tubesheet Induced Loadings on Flange Design in AD Merkblatter B8

    Hi all, I am new to HEX design and that too using ADM Code. Using AutoPipe Vessel, I designed a custom weld-neck flange per B7 & B8 for my BEU exchanger. Subsequently, I designed tubesheet per B5 (6.7.3). From the report generated by AutoPipe Vessel and further delving into calculation steps...
  6. Awais Arshad

    m & Y factors for 13 Cr-Mo 44 Metal Grooved Gasket

    @CuMo, @SnTMan, @r6155, @Krausen, @VFK, many thanks for the responses. From a cumulative understanding developed from your inputs, I opted for flexitallic PN type kammprofile gasket and took m and Y factors avaiable in their brochure. Further, I checked SS type flange for Hydrogen Induced SCC...
  7. Awais Arshad

    m & Y factors for 13 Cr-Mo 44 Metal Grooved Gasket

    Hello, I am in a fix these days while designing a modified U-tube bundle for a heat exchanger on ASME VIII-I and TEMA ‘R’. Originally, exchanger had a 13 Cr-Mo 44 metal grooved gasket. Now while I am modifying the tube-bundle due to updated process requirements, I need to evaluate the exchanger...

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