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  • Users: waliq
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  1. waliq

    Nozzles in a stack - Corten Steel

    The nozzle is to be attached 7M above grade. The nozzle shall be blinded and a probe shall only be installed to analyze the flu gases occassionally. The connection of nozzle to stack shell is a full penetration weld The material grade of stack itself is unknown. The drawing only mentions the...
  2. 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...
  3. waliq

    RT for piping

    @Krausen: Thanks for the response! The inspection Manager at my company has the view to employ GTAW technique for atleast the root pass followed by SMAW for remaining (Hot, intermediate and filler) passes. 1) However, I need to know any ASME (B31.3 or Section IX) clauses to negate this opinion...
  4. 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...
  5. 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...
  6. waliq

    Gas turbine Exhaust Duct Material

    @Ed stainless: You mean SS 410 or 430?. Also, I guess if we can provide slotted holes on the inner side, should it be helpful? @Littleinch: The duct is 3 meters in length
  7. waliq

    Gas turbine Exhaust Duct Material

    @GD2 Actually, the turbine was installed a number of years ago. Therefore, we do not have access to vendor now.
  8. waliq

    Gas turbine Exhaust Duct Material

    @swinyy GG: Can you suggest an alternative? What is we use inconel alloy lining instead of SS? Refractory is another option. However, the duct has a conical profile with flat bottom and hence refractory application is a difficult method here
  9. 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...
  10. waliq

    High temperature S&Tmaterial

    Moreover, can anyone tell if SS 321 and SS 347 grades are covered under NACE MR0175. I could not find the exact grades and hardness, temperature limits. I intend to use them for an equipment having design temperature of 400 Deg C. However, as per Annex A of NACE MR0175, the Austenitic stainless...
  11. 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...
  12. 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...
  13. waliq

    Flanged and flued vs bellows

    @sntman: Well, thats the first time I have encountered such a design situation. Maybe, an FEA needs to be done here as well.
  14. waliq

    Flanged and flued vs bellows

    @sntman: Can a flanged and flued expansion joint cater lateral stresses or is it good for only axial stresses?? Actually, the vessel is flanged to two vessels through nozzles located on their shells (one above and one below it). The expansion joint is there to cater the stresses that may arrive...
  15. waliq

    Flanged and flued vs bellows

    snTman: Actually my vendor is giving a F&F joint with two convolutions (thickness 18 mm each) It is for a vertical vessel of thickness 8 mm and design temperature 230 Deg C Now, by drain and vent for every convolution, I assume that they are required to drain off any working fluid trapped in...
  16. waliq

    Flanged and flued vs bellows

    @snTman: This is such a helpful reply. Thumbs up!!! Can a flanged and flued head have more than one convolution??
  17. 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...
  18. 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...
  19. waliq

    Column body flange

    @sntman: Thanku for the information!!!! Well from what u have said, I will need the vendor to go with App2 flanges. Since the tubesheet is a bolted through one for a BEU exchanger. Hence it has two steps. So, with the facing on flange, I think it needs to be designed as per app2. I have always...
  20. waliq

    Column body flange

    @snTman: Well I may have not put the question clearly. It is more about the gasket face (that I relaized after I had put the question here) The girth flanges need gasketed joints on both sides with the tubesheet so the gasket groove of 5 mm is required. Even with spiral wound gasket, the...

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