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  1. mandarkardekar

    Chattering of Safety Valve based on oversizing

    We are procuring PSV from one of reputed vendor where there is a remarkable difference between effective and actual discharge of orifice. Vendor has selected "R" type orifice as per API520, with effective discharge area as 10322mm2. However actual discharge area for the same is specified as...
  2. mandarkardekar

    PWHT for Low Alloy Steel.

    PWHT, is it mandatory for low alloy steels such as SA-387 Gr.5, Cl.2 plates for all thicknesses? In my project vendor has provided PWHT for all such cases for entire vessel. please someone guide.
  3. mandarkardekar

    Difference between "Design by Rule" and "Design by Analysis"?

    What is the difference between "Design by Rule" and "Design by Analysis" in Sec.VIII Div.2? When we have to apply either of them?
  4. mandarkardekar

    ASME Sec. VIII, Div.2 Code stamped Equipments

    What is additional requirements and method is required to handle Div.2 code stamped equipment. I have used sec.VIII Div.1 but not Div.2. Can someone please summarize.
  5. mandarkardekar

    difference between TEMA thick expansion joint and ASME app. 5?

    difference between TEMA thick expansion joint and ASME app. 5 expansion joint?
  6. mandarkardekar

    reduction in tube thickness due to over expansion

    It was happened the over expanding for shell and tube exchanger during the expanding work. (Tube min. required Th’k : 2.77mm, Tube Th’k after expanding : 2.70mm) IS this acceptable?
  7. mandarkardekar

    Selection criteria for SA 516 GR. 60 and GR.70?

    For carbon steel pressure vessel what is the criteria for choosing SA 516 Gr.60 or SA 516 Gr.70?
  8. mandarkardekar

    Acceptability of Kopp & Sayer method of calculation for thick expansion joint?

    As per TEMA ninth edition, RCB-8 Flexible shell elements, for design of thick expansion joint Finite Element Method is applied. Does it mean if we are using TEMA and ASME as design standard and code respectively, we can not apply Kopp & Sayer method for design of thick expansion joint? What...
  9. mandarkardekar

    Allowable stress for SA-789 (UNS S32750) tube material of size 1.25"

    Subject data is not available in ASME IID, also no size limitation in ASME Sec IIA. What allowable values can be used for these tubes? IS it ok if we use values for 1"size tubes? or chaning the tube size to 1" from 1.25"is the only option?
  10. mandarkardekar

    How to apply TEMA beyond scope criteria ???

    TEMA has general scope criteria as any of the following do not exceed - 1. Inside Diameter =2540 mm 2. Design Pressure = 20684 kPa 3. Product of nominal dia & design pressure = 17.5 x 106 mm-kPa Also TEMA says, criteria contained in these standards may be applied to units which exceed the...

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