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  1. Venkatachalam Ponnusamy

    Difference Between Tube & Pipe:-

    Dear All, Refer to the subject can anyone explain what is the Difference between Tube & Pipe in terms of Technical aspect. I Have observed the following differences Primarily :- 1. Understand that Tube will be available in Circular/Square/Rectangular, where as Pipe will be available in only...
  2. Venkatachalam Ponnusamy

    What are Mandatory Spares for Pressure Vessels:-

    Hi.. Refer to the subject we have requirement for supply of Stand alone Pressure vessels to our customer for refinery applications. Scope includes the following as well:- 1. Mandatory spares, 2. Erection & Commissioning Spares, 3. Two Year Operational Spares. Understand that for Bare Vessels...
  3. Venkatachalam Ponnusamy

    Hydro Test of Replacement Tube Bundle for Shell & Tube Heat Exchanger:-

    Hi.. Refer to the subject, our client have requirement for Tube Bundle Replacement for Shell & Tube Heat Exchanger.. Our scope includes Hydro test of tube bundle on Shell Side only, for the same we have to design a dummy shell, Test Flange, Test Ring & Packing Gland to complete the hydro on...
  4. Venkatachalam Ponnusamy

    Difference between Min & Avg Tube Wall Thickness of Heat Exchangers

    Want to understand the difference between minimum & average Tube wall thickness. My basic understanding is if we order for minimum wall thickness then there won't be any negative tolerance is allowed in wall thickness. whereas if we order for Avg wall thickness then there will be both Positive &...
  5. Venkatachalam Ponnusamy

    Use of Standard Flanges (WNRF/SORF) instead of Girth Flanges for Shell & Tube Heat Exchanger:-

    Good Day.. Refer to the subject we have a requirement for Supply of Shell & Tube Heat Exchanger to Liquid Handling Terminal at Port. Type of Heat Exchanger is TEMA R - BEU (H) and ASME, Shell Sizes for various exchangers are 10",12" & 14". Design pressure is around 5.3 Kg/cm2 & Design...
  6. Venkatachalam Ponnusamy

    Pneumatic Testing of Fuel Gas Conditioning Skid..

    I have to carry-out a Pneumatic Test by using either air or N2 (Nitrogen) for my 3 identical Fuel Gas Conditioning Skid (FGCS) after assembly of complete vessel & piping's at our shop, this is to verify the integrity of all piping/vessel joints for offshore application. As per our Customer...
  7. Venkatachalam Ponnusamy

    Why NACE required for SS 316L Material ?

    Understand that SS 316L is already a corrosion resistance material but still our client asking us to Procure SS 316L material certified with NACE requirements. If i approach vendor for NACE requirement for SS 316L, they don't carry out any additional test under NACE standard, but their TPI...
  8. Venkatachalam Ponnusamy

    Selection of Series A & Series B Flanges under ASME B 16.47

    In Piping Flanges there are two different categories available under ASME B 16.47. one is Series A and another one is Series B. Why two different standards for the same size of Standard Flanges, is that only for the following Purpose:- 1. Series A Flanges to withstand more piping loads 2...
  9. Venkatachalam Ponnusamy

    Difference between Vane Pack & Wire Mesh Demister Pad

    Can anyone explain about the application & major difference between Vane Pack & Wire Mesh Demister Pad. Whether both are used for Gas Applications ? I understand that the Demister Pad is used to remove the liquid droplets from the Gas. Your advice will be appreciated a lot
  10. Venkatachalam Ponnusamy

    Hydrotest Cover thickness calculation

    i have a pig launcher & receiver with the end flange size as 48" x 600# x 27 mm pipe wall thickness, to carry-out hydro test now i wanted to calculate the cover/blind thickness to carry-out hydrotest @ 140 Kg/cm2, any suggestions/guide that can help me to move forward. Regards Venkat
  11. Venkatachalam Ponnusamy

    Calculation of Corrosion Allowance for Carbon Steel Material

    We are working on one of the project in India for Gas Sweetening by Amine (Removal of CO2 & H2S) & Gas Dehydration Unit, we have to Design the equipments and pipings for 6 Years of Design Life and accordingly the materials needs to be selected. In the inlet Gas we have 11.61% of CO2 & 100 PPM...

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