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  • Users: waliq
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  1. waliq

    Nozzles in a stack - Corten Steel

    Hi, We want to cut 02 nozzles of NPS 3" each in an existing stack. The nozzles are instrument nozzles Diameter of stack : 1350 mm Design pressure : Atm Operating Pressure : 280 Deg C MOC Stack shell : Corten steel (Grade not available in drawing) Thickness of shell : 10 mm My questions in...
  2. waliq

    RT for piping

    Hi all, We have a diesel storage tank whose diesel lines are of NPS4", NPS3", NPS2" and NPS1.5" The operating pressure in lines is 3.5 Bar at pump discharge and operating temperature varies from 40-60 Deg C. The line material is A53B standard schedule thickness We used SMAW welding technique...
  3. waliq

    A572 Gr 50 plate material

    Hi everyone, Can anyone tell me if the ASTM material A572 Gr. 50 meets standard ASME requirements? I looked up for this material in ASME Sec 2, Part D but could not locate it there. I am assuming that this material is not adopted by ASME. Can anyone confirm the same and if this plate can be...
  4. waliq

    Gas turbine Exhaust Duct Material

    We want to install a duct at the outlet of Gas turbine. The temperature of Exhaust gases leaving the GT is 540 Deg C. There is also a duct burner installed, which when operated, raises the temperature of gases to 750 Deg C. Design pressure for this duct is 300 mm WC We have asked the vendor if...
  5. waliq

    Activities and predecessors

    Hi all, I am new to project engineering. Can anyone here tell me any site or share any data about all activities that are carried out in an EPC project (oil and gas sector) For example, P&IDs and their required upstream documents and the downstream docs etc. Actually, i want to learn making a...
  6. waliq

    High temperature reboiler tubes material

    Hi all, We are working on a reboiler that is basically of AEU type heat exchanger configuration. The shell side has Glycol while on the tube side there is direct firing through burners. The burner shall be directly firing in the channel side through which the flue gases shall be directed to a...
  7. waliq

    Flanged and flued vs bellows

    Hi all, Can anyone explain the difference between flanged and flued expansion joints and bellow type expansion joints. ASME sec VIII, Div.1, mandatory appendix 26 talks about bellows expansion joints while, in mandatory appendix 5, it talks about flanged and flued type expansion joints. If both...
  8. waliq

    Golden weld in pressure vessel columns

    Hi all, I have heard about golden welds in gas pipelines. I know little about these welds in that they need to be performed by highly qualified welders, cannot be hydro statically tested and need more than one NDT methods to compensate for the hydrotest not performed. However, I want to know...
  9. waliq

    Column body flange

    There is a column of OD 660 mm. Vendor is using a body flange as per ASME B16.47 series B. The size of flange is NPS 26". The dimension A of flange is 661.9 mm. Vendor is using an outside taper in thickness of flange. I have asked him to use a non standard flange as per Appendix 2 but vendor is...
  10. waliq

    WRC 107 support lugs

    Hi all, I has been designing a support lug for a vertical vessel (outer diameter = 610 mm). Length (T/T) 4100mm, MOC: SA 240 316L. However, I was checking the feasibility of support lugs to vendor in lieu of skirt support ( owing to bottom head inspection issues of using a skirt on such a...
  11. waliq

    UHA 44 Post fabrication requirements for SA 240 316L

    Hi, I was reviewing Table UHA 44. I could not find the material 316L listed there. 316 is listed but 316L is not. Is there any specific reason?? In case, the allowable elongation range for an elliptical head of SA 240 316L is to be seen, does the code provide any reference for it?
  12. waliq

    PWHT (SS Cladding 316)

    Hello, I recently reviewed a vessel of material SA 516 70, cladded with SA 240 316. The thickness is 14mm and is in lethal service. The vessel requires PWHT as per UW-2 due to being lethal. If I refer to table UHA -32-3, it says that the PWHT for P No.8 austenitic stainless steel is neither...
  13. waliq

    Corroded hydrotest Pv Elite

    I was designing a vessel on PV Elite. There, in the design tab, i checked the option of Hydrotest as per UG 99 C. Then, below I also checked the option of corroded hydrotest. The idea behind doing this was, that I thought it would now test the vessel according to UG 99 C in new and cold (shop...
  14. waliq

    UCS 66 materials

    Hello, If I refer to UCS 66 curve note 3 (b), it says, "all materials listed in 2(a) and 2(c) for Curve B if produced to fine grain practice and normalized, normalized and tempered, or liquid quenched and tempered as permitted in the material specification, and not listed for Curve D below"...
  15. waliq

    SA 333 Grade 6 Pipe and SA 350 LF 2 Cl.1 Material

    Hi all, I have been looking into the materials for nozzle pipe and flange for a vessel intended for a low temperature applications of -40 Deg C I found out that SA 333 Grade 6 can be used to min. temperature to a minimum temperature of -45 Deg C while SA 350 LF Cl. 1 can be used to a min...
  16. waliq

    Pressure vessel skirt sizing

    Is there any limitation for a minimum height of skirt? I understand that the skirt height should be sufficient to allow for visual inspection. The piping department wants to know if there is any min. height of skirt that is allowed? I have read various articles but only found material on...

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