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  • Users: Raai2015
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  1. Raai2015

    Book Suggestion

    Hallo can anyone suggest a book for the starter to study on Welding on structural steels (Bemas..)Thank you verymuich in Advance°!
  2. Raai2015

    Header Pressure balance

    Hallo all, its about the Header pressure derviation. I didnt understand the derivation on the red mark (Massflux term) in the picture. If anybody can clarify would be helpfull. https://files.engineering.com/getfile.aspx?folder=7a698ca4-6b74-4ee3-9f80-23480c877cf6&file=Header_Pressure.PNG
  3. Raai2015

    Fluid dynamics - Header pressure

    Hallo all, its about the Header pressure derviation. I didnt understand the derivation on the red mark (Massflux term) in the picture. If anybody can clarify would be helpfull.
  4. Raai2015

    Boiler drum and Ends with different material!

    Hallo all , as said due to the material availability , we have alloy steel Shell WB36 and the Ends P355GH . Have anybody done this combisnation or any thoughts what should be the checklist? Welding: How are the Welding thoughts" Thanks for the expert helps!
  5. Raai2015

    Corrosion rate for Boiler tubes

    Hello all, I am just looking for the corrosion rate (nm/h) for the european materials like P235GH / 16Mo3. Anyidea where i can find this?
  6. Raai2015

    Welding cost - 16Mo3

    Hello all, I am just looking for an approximate welding cost. DN250 x 16mm - DN250 x 16mm - 16Mo3 DN250 x 16mm - DN25 X 5mm - 16Mo3 Approximate cost of normal butt weld?
  7. Raai2015

    TP347 with T11

    Hello all, I have seen an weld between TP 347 with T11. Just looking for some calcualtion to support this weld is Good. May be selection of electrode will also be helpfull. I want to understand this because previously i understood wrongly. Experts help will be appreciable.
  8. Raai2015

    Flow nozzle in thermal powerplant piping.

    Just need a guidance , Flow nozzle location for Feed water pipe and Main steam pipe. It is a argument between Vertical or horizontal. i am just looking for any supporting writeup to support the argument. for eg something given on this book Power plant control and instrumentation, unfortunately...
  9. Raai2015

    Controlled safety pressure releive system

    As subject, most of us knows , conventional springloaded safety valve has checknut in the bonnet which will keep the spring during operation , when it reaches the set pressure , spring will be compressed against the checknut by steam and releive it. In the Pneumatic, air pressure will act on the...
  10. Raai2015

    Conventional spring loaded safety vs Pnuematic assisted safety valve (Controlled safety valve)

    As subject, most of us knows , conventional springloaded safety valve has checknut in the bonnet which will keep the spring during operation , when it reaches the set pressure , spring will be compressed against the checknut by steam and releive it. In the Pneumatic, air pressure will act on...
  11. Raai2015

    ASME B31.1 / ASME TDP-1 desuperheater piping.

    as per ASMe B31.1 ; cl:122.4 on attemperator block valave ''regulating valve shall be installed upstream of the stop valve. In additon, if the steam generator supplies steam to the steam turbine, a power operated block valves shall be installed upstream of the regulating valve."" - this is self...
  12. Raai2015

    Boiler 'Attemperation'

    Hi all , We have the boiler desuperheater control by Multiple nozzle desuperheater valve. I got a offer from two reupted supplier. Below are some details on design case. Spray flow : 3,11tph Spec density : 0,95 Cv @ 80% opening : 6,78 Dp offered : 0,3 bar On the above i calcualted the DP , it...
  13. Raai2015

    Multiple nozzle desuperheater valve - Pressure drop and weber number.

    Hi all , We have the boiler desuperheater control by Multiple nozzle desuperheater valve. I got a offer from two reupted supplier. Below are some details on design case. Spray flow : 3,11tph Spec density : 0,95 Cv @ 80% opening : 6,78 Dp offered : 0,3 bar On the above i calcualted the DP , it...
  14. Raai2015

    Boiler Desuperheater control valve - Regulating valve

    As per ASME B31.1 clause 122,4 (A.1) "If the steam generator supplies steam to a steam turbine, a power-operated block valve shall be installed upstream of the regulating valve" - It is self explanatory. Is there any equivalent or similar writing in EN code or PED? PS : I will be posting this...
  15. Raai2015

    Corrosion Allowance : Piping applicable to EN13480 _PAS 1057-1:2008

    Hi all, EN13480 doesnt specify on the magnitube of thickness allowance but PAS1057 says 1mm for Ferritic pipe irrespective of Technical delivery condition. Query is if i sent the calcualtion to Statutory body, do they ask for 1mm allowance...
  16. Raai2015

    Boiler tube welding TP347H with P22

    Dear All, This is for the Boiler final Superheater. FSH tube material is TP347H (please dont ask why as customer forced me use this as this is EFW Boiler). Header material is P22. I suggested Intermediate material of T91 otherwise i say they have welding issues due to different expansion and...
  17. Raai2015

    Boiler Tube welding

    Dear All, This is for the Boiler final Superheater. FSH tube material is TP304H (please dont ask why as customer forced me use this as this is EFW Boiler). Header material is P22. I suggested Intermediate material of T91 otherwise i say they have welding issues. But customer wants to weld...
  18. Raai2015

    Hi, Does anybody has or knows where

    Hi, Does anybody has or knows where can i get this book '' Control Valve Sizing & Selection" by Les Driskoll'' . Will be helpfull if i have this book.
  19. Raai2015

    VFD pump

    All, I have a feed pump offer with VFD Installation which is with 50Hz and 2 poles , synchroneous Speed is 3000rpm. Querries are 1. To what minimum frequency or rpm i can go down ? 2. How can i calcualte the Minimum rpm or frequnecy (Hz)? because if i have any load lower than this rpm , i need...
  20. Raai2015

    Energy from Waste - EfW boiler group

    Hi all , is there any Group for EfW Boiler

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