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

As per EN12952-3 ; if the static head is less than 0,5bar than it shall be neglected!

ione: It is clear , appreciable if any Body could derive!i have tried and failed!

chicopee.Offcourse this is Bernaoullis

Justbplay with the thk, i think you can get away!

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

@ Davefitz. Agreed. If i understand the Question correctly '' Is there a type of water-tube boiler which has its steam drum or water drum exposed to heat (either radiation or convection)?'' the Answer is 'Yes' . to my Knowledge not by Radiation but by Convection - and not in the power...

@ Littleinch : Yes tubes are mostly equal spaced. For the Derivation we can assume equally spaced.but by Chance can you derive? I am also going to post this is in Boiler group.

@ Davefitz , if i remember correctly , most of the Bi-drum Boiler (Industrial Boiler)Bottom of the top drum is in the flue gas path??Further Ligament effeciance is much small in the range of 45-60%

Sorry if the attachments is missed!https://files.engineering.com/getfile.aspx?folder=a3ed0f77-4b5c-473d-b26d-ddad8331d515&file=Header_Pressure.PNG

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.

@Kingero : Ja, we have the full time specialist. Ist for me to have th Basic understanding!

Hi guys, finally i could find the PWHT temperatures in EN 12952-5. Thanks for the replies!

Hi Kingnero : We have the weld expert who takes responsibilities of this stuff. This weld consumables are written down in the pressure püart drawing. i would like to understand this stuf! WB36 ; Cu = 0,50-0,80

Hallo all , anyidea where can i find the filler material (weld metal) for this dissimilar weld? May be an european norm reference would be acceptable! Many thanks!

XL83NL : if you could post anything constructively , would be appreciable. ironic metall: yes we got experts!

Kingnero : its for EN12952-3

Hi Cronin!It is for the Boiler Drum with European norm. WB36 is equivalent to SA 306 GrB or A & P355GH equivalent is SA 516. Never used a material combination other than nozzles with different material on drum. Regarding Welding : Being a process & presure part enginner, knowledge on welding...

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!

This is for WTE Boiler. I have corrosion rate for some ASME material but not EN material.