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Actually, a vibration survey had been conducted, at diffrent point they measured frequency, velocity and the displacment. in some places the insulation got removed... when run the modal analysis, and get the frequencies, shall I compare them with the frequencies they measured? or compare that...

thanks for your reply, we have received measured vibration and their frequencies ( displacement, velocities and frequencies at different point of the system... Could you pls advise on how I will compute these parameters? Thanks for your help.

Hello Every one, Does anyone could advise me where I can find materials for performing dynamic analysis? we have received a vibration survey from the our client. vibration occured in existing suction and discharge centrifugal water pumps. I have never had a chance to perform such analysis, I...

Hello evey one, as my best knowledge, using flange CS assembled to SS flange,will create a galvanic corrosion unless the bolts are isolated. The issue is this, we are using lapjoint flange ( stub end SS, lap joint flange is CS) connected to equipement which have SS flange nozzle. the material...

in our case the client prefers to have flexible hose connection instead of expansion joint. But flexible hose connot be modeled in caesar II programm ( beam thoery). so I am mdeling at the point location as free end , with Axial anchor close and limit the operating lateral mvt to 3mm, and...

Yes , thanks for your reply... line size is 10", DesP 0.18 bar (2.6 psi), DesT=110 C (230F), pipe material Stainless steel (304/304L). Thanks in advance, Dj364

I mean Flexible hose.

Dear Members, Could any one has a thought about using flexible joint instead of expasion joint? I'll appreciate your feedback. Regards. Dj364

hello Tom Well, it depends on what material... Please refer to ASME B16.5 Regards

Hello John, I am sorry I got a little bit confused. Hanger sizing: I have spring selection procedure in CAESAR II ( section note seminar held by Dave Diehl 2004). The procedure of sizing a spring hanger/support is outlined in this section, it is clearly mentioned with a Y restraint at the...

Hello John, Just to make sure what you wrote above. "first do a cold weight plus pressure (W+P) analysis with a rigid hanger at the location and determine the weight on the rigid hanger (required supporting force)." Without using computer selection, calculating the hot loads by first doing...

Thanks BigInch, The Dwgs I have, don't show any anchor point.For vertical expansion, I Assumed it from the level grade ( package/skid mounted 1.6m). it s important for me, because I am putting a spring hanger just close to the nozzle, therefore the thermal displacements affect the thermal...

Hello every one, I have received old existing drawings ( turbine/compressor). I have to set turbine nozzle initial ( thermal) displacements in my analysis. I am reading on drawing " center of gravity". this point is shown on the compressor side. ( turbine and compressor have the same...

Thanks very much John,You've really helped me to get a better overview. The by pass line is only 1". for my understanding it does not affect very much the 4" small spool to suction nozzle and 8" line where the 1" is connected. I made sure that the 1" line is enough supported and flexible as...

Thanks very much, I appreciate your help John . Kind regards Dj.

Thanks so much John for your valuable explanation, "The forum wouldn't have any value without a Gentleman like you, I learnt many things by reading your replies in the forum" One last question, If you don 't mind. when running (weight + pressure) analysis in order to get Hot load and...

thanks for your reply, I have modeled the existing line as well as the spring support, i have performed the analysis with adding a valve. I ve checked loads against the applicable code ( NEMA SM23), they still within the allowable. the spring support could be re-used according to my analysis...

Dear members, I am checking the existing Spring can in order to re-use it. after modifying a the same spool by adding a new flanged valve. I asked for data of the spring, only spring rate, the and type are available informations. the cold load is missing. Does anyone know what are the...

Hello NozzleTwister, Thanks for your valuable explanation, I've rarely seen this type configuration what you described above. At the present most of pumps discharge lines are like going up after reducer check+block valve..etc.. Even the piping designer, whenever he has design the discharge High...

Thanks DSB 123 for your reply...I am taking your reply in positive way! Actually, may be you misunderstood...I just want some advices. I know how to model, I ve done some stress work in the past, and now i am going back. what I want is some tips,advices..from experience, if there s something I...