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Hello members I want to arise aquestion about the age of boiler tubes .it depend on the operation houers or on the testing report .we have boiler works more than 100,000, houers .What is the advice to make complete retubing or according to the testing report .the boiler pressure 127kg/cm^2 &the...

Hello My great thanks to all member reply to this case .All replys are useful and have good recomendation .It gives us good information to anlyies the case of vibration. I attachthe last reading of vibration and some illustration drawing of fans and the location of the chanal my be useful in...

Hello members Question arise about the horizantal vibration in the foundation of the FDF (force draft fan) .the boiler have two FDF one left and the other right .There is acable chanal between them in that chanal we have upnormal horizantal vibration .the fans was balance as per specifcation ...

Hello Mr sarmad1010 I want to inform you that the root of cause of explostion is explane in the first question of this thread. Also i attach to you other picture of the dearater explostion in the link below . Thank you very much and god bless . jamil a alshahed nama hartha power...

Hello Mr sarmad1010 thank you very much for your cooperation .my dear i attach to you the the picture of the dearater explostion thank you very much and god bless . jamil a alshahed nama hartha power...

Hello members I want some advice how to caculate the operation pressure of boiler .my task is that we have boiler design pressure is(257kg/cm^2)and operation pressure is (140kg/cm^2) after 25 year of operation we get areduction in thickness from 6mm to 4mm in the tubes .we have no time for...

Hello MR inthefield Thank you very much for your advice it is very usfuel for me .my dear i want to inform you that the chemical cleaning of the boiler is for complete boiler (660T/H)capacity .according to the chemical cleaning procedure the down comer must be close and the chemical is feed to...

Hello Thank you MR unclesyd for you reply .The material of the baffle is carbon steel (ss41) and the crack is radial hair crack with alonge of 5cm .The thickness of the material is 4.5mm .thank you very much and god bless . jamil a alshahed nama hartha power station

Hello members we have chemical cleaning we need to close the down commer inside the drum (size 40cm )can we use simple tack weld to support the closer .please advice us . thank you very much and god bless. jamil a alshahed nama hartha power station

Hello members We have crack in steam drum baffle can any one give us advice how to repair that crack. thank you very much and god bless. jamil a alshahed nama hartha power station

hello members I want to introduce my thanks to all members whom gives advice in this case .it give us very good conclusions about the failure and put us on the right route .it contain very good analyses about the case .and also some reply give the right point on what happened .My special...

Hello members we have conflict with the fabricater of the dish end .about heat treatment .The dish is fabricated by cold forming according to (UCS-79) detail (d).the dish must be heat treated if the extreme fiber elongation is more than 5%.the fabricater give us calculation according to the...

hello i want to express my thank to MR gr2 vessels and MR chief ana MR lownox for the good advice . and i want to inform mr chief that the boiler model is CE CORNER FIRING with capacity of 660t/h and the burner is retractable .also i want to ask mr chief about the crude tamperture (100C) at the...

hello member The main fuel in our boilers is crude oil .and that is the main probleam of burner closing .The crude oil deposite on the tip of the burner as in the attach and that cause burner spray tips to close . the burner pressure is 20kg/cm^2 and the automizing steam pressure is 7kg/cm^2...

Hello MR chief Thank you very much for you good advice .MR CHIEF i want to ask you some question about your coment. 1-the proprietary chemical in your coment used as addative to the crude oil to prevent builtup .or used as cleaning agant .(can you guide us to this chemical please). 2-In our...

hello member we are constructed new dearator the material choose is SA 516 GR 70 the thickness of the dish end 25mm and the shell is 16 mm .the question is that. 1-the welding of the dish end need to be post weld heat treatment for that thickness . 2-the reduction of thickness in the dish end...

hello member in our boilers we use crude oil firing as the main fuel and that result in many and hard depoist on the side wall of the boiler .the chemical cleaning we use is not efficant for removing the depoist so we use sand blast it is good and efficant ..the question is that-- is the sand...

hello member the purity of the hydrogen used for cooling the 200mw generator is reduce .we supply the generator with 99.9% purity hydrogen .i want to ask the expert and need their coment about this point . 1-the sealing oil have effect on the purity 2-the supply piping cleaness and type 3-the...

hyl hello i would like to express my sincerest gratitude to MR Goahead and MR metengr for their advice about the hydrogen attack and i want to inform them that all the failure tubes are infected in the corssion area in the fire side and most of them in pipes that change during the anual...

HELLO IN NAJYBIA POWER STATION UNIT NO/4 CAPACITY 100MW .THE UNIT WAS IN OPERATION AND SUDDENLY SHUTTDOWN BECAUSE OF NET FAILURE AND ALSO THEY LOST THE EMERGENCY POWER . THE DEARATOR WHICH IS OPERATED AT PRESSURE OF 5KG/CM^2 THE THICKNESS OF THE DEARATOR AND STORGE TANK IS 12.5 MM THE...