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I came across this term in Aerial Compressor Manual. Also, I tried to search further & got this : "For ELP units with no drilled hole in the connecting rod, bushing hole alignment is not critical". Other than that I am unable to find more information. Can someone tell me what ELP stands for? if...

Please review my ansys apdl code for errors as I have to design a tuned beam for frequency 45Hz and 29.5 Hz. I have made a beam but I am getting 99.2Hz vibration. I want to make sure the program I wrote is correct. Please also tell me why I get the error of "the degree of freedom solution is not...

I need to know about what the prefix means in different engine families of GE waukesha. There are 6 that I came across: ATGL,APG,VHP,VGF,VSG,275 GL. I searched the internet to find only two: VHP = Very High Power APG= Advanced Power Generator. Need to know about the others as I have to give a...

The compressor was commisioned in 2015, the slide valve of the compressor is stuck at less than 4%. the compressor doesn't start and trips. The slide valve had the double acting actuator that is gas stream at one side and oil at other. previously a locknut breakage issue happened on the...

Hi, I am confused about stages in an impulse turbine. Generally in industry i have seen that an impulse turbine with single rotor having 2 rows of buckets is called a single stage.(curtis stage) My concept is that nozzle + rotor is a stage. if we have one set of nozzles and 3 rotors then it is...

question persists. Why can't we use journal bearings? is it due to improper oil wedge formation?

1. do you use forced lubrication? 2. we have a double acting reciprocating compressor having bush & pin. My boss told me that bearings ain't used as they are Babbitted & can't take impact load .

A journal bearing is used at the big end of connecting rod (crankshaft side) but not at the small end . on the contrary a pin is used. why is that? why can't we use journal bearing at the small end too. I am considering a huge reciprocating compressor/pump

pH comes out to be 9.7. Seems like SCC is the culprit

Yes, I also read it in API RP 581....working on collecting pH data. presently new catacarb solution data is as under: CATACARB CATALYST 400:pH (10% AQ. SOLUTION): 11-12 CATACARB INHIBITOR 922A:pH (5% AQ. SOLUTION): 12.1 CATACARB DEFOAMER WBU:pH: 7 But i dont have the pH of catacarb after...

The licenser of Catacarb Solution allows 200-400 PPM Chloride in the solution without risk of Stress Corrosion Cracking where as we have very nominal Chloride in comparison (<50 PPM). According to experience, the inhibited CATACARB solution has greatly reduced the chance of occurrence, even...

I have been pondering over this as well. maybe you are right & chlorides should not be present. Will send my queries to process department for clarifications. nice direction of thinking!!!!!

Thank you so much -EdStainless & georgeverghese- for your replies. I have forwarded my recommendations of re-evaluating the design & material & checking the process parameters. As it clearly indicates that SCC is the problem

Dear georgeverghese, My company will be reluctant to go for such a change. I will explore the possibility though. Is changing the material of present HX the only option to get rid of SCC? any options for the repair of leakages that we are encountering?

Dear georgeverghese, I think plate type heat exchanger would not be a good choice as we have effluent gas at one side. furthermore catacarb crytallization maybe a problem. Is it easier to clean plate type HX or shell & tube HX?

[highlight #CC0000]Have you ordered the replacement bundle?[/highlight] We have two such heat exchangers currently in operation. We have ordered one new bundle with modified design i.e. having a single tube-sheet. But our concern is that similar problems maybe seen in the second Heat exchanger...

SHELL SIDE SERVICE: CATACARB SOLUTION TUBE SIDE: EFFLUENT GAS-H2, NH3, etc TEMPERATURE catacarb 120C shell MATERIAL: A285 Gr C clad with ss 304 Tube side material: ASTM A213 TP 304L We have a semi-lean generator which regenerates catacarb soluton in ammonia plant, the...

I will have to confirm about the s content. But my point is scc will effect the tubes as catacarb solution will flow over the tubes. the weld seam of tube-to-tubesheet is exposed to effluent gas. kindly view the pic for getting an idea. furthermore the tubesheet is a double tubesheet...

DESCRIPTION SHELL SIDE TUBE SIDE SERVICE CATACARB SOLUTION EFFLUENT GAS-H2, NH3, etc TEMPERATURE 120C MATERIAL A285 Gr C clad with ss 304 ASTM A213 TP 304L We have a semi-lean generator which regenerates catacarb soluton in ammonia plant, the specs of which are given...

if thermal diffusivity is much greater.....what is predicted regarding the temp of the body?...will it be higher...as the cp in denominator is higher?...ans specifically to the point raised pls.