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Dear friends , What are the guidelines for performance of shell and tube type heat exchanger. Thanks "Knowledge is power"

Dear friends, It is a 100 KV, single phase isolation transformer with 20 amp. rating. This is not a step up or step down transformer. It is a 1:1 transformer. The isolation between primary to seconday is 100 kv and secondary to ground also 100 kv. Thanks Arun "Knowledge is power"

Soryy friend , I am testing insulation resistance with a 1000 V megger. This resistance tells us something about the health of insulation. If there is a degradation of insulation this resistance goes down and more leakage occurs through the insulation which ultimately results in loss of voltage...

Hi! Thanks for your advice. I have already done maintainance test with 1000 v megger. I heard about lightning impulse test. Can that be used for Isolation transformer. I would like to know if ISO or any othe code gives guideline for it? Arun "Knowledge is power"

Hi friends! I am a mechanical engineer, but I need to know the isolation between primary and secondary and secondary to ground for a 150 KV type isolation transformer. Can anybody suggest where I can find the procerure for this. Is there any ISO guideline for this? Thanks Arun "Knowledge...

Hi, I would like to know what is the general level illumination(in LUX) for an industrial building. Is there any website for this info? Thanks "Knowledge is power"

HI , We are having a pressure vessel( operating pr. 100 psi) whcih has an end cover which is abot 8 feet in dia. There are two grooves on this flange for gasket. Previously we were having rubber gaskets in this grooves. Depth of these grooves is 5 mm. Can one use ePTFE gasket tape for this...

Thanks for the reply. But if you see the formula given in the code, the thickness of a torispherical head is : t=P*L*M/(2*S*E-0.2*P) + CA where L is crown radius M=.25*(3+sqrt(L/r)) ris knucke radius. From this I can conclude that thickness is proportional to crown radius, so I should keep...

Hello, I would like to know how to select or decide about the crown radius for a torispherical head for a vessel. Is there any relation of this radis to the shell radius for optimum design. In code it is said the knuckle radius dhould be 6 % od the crown radius, but nothing is stated about how...

What does it mean by words SR and PXR on the name plate of a U coded vessel , just below U stamp Thanks "Knowledge is power"

What kind of strengths could be achieved with brazed joints? "Knowledge is power"

No it is not brazing. I am talking about diffusion bonding. This kind of joint is particularly useful for making Ultra High Vacuum components. Brazed joints can not be used for UHV applications. "Knowledge is power"

How Titanium -Alumina ceramic joints(by diffusion bonding process) are made. We do not want to use adhesives.Is there any site or any practical data available for this. What should be the temperature, pressure and intermediate material required for this making this joint. "Knowledge is...

What is your pumping rate and the type of vacuum needed. Normally making a vacuum vessel is not very difficult. Largly it depends on the order of vacuum needed and the operating temperature.If Ultra High Vacuum is needed then special skills are required. Contact Peiffer Vacuum Germany...

Thanks tonyh and smckennz. But a little more clarification. I have mentioned the flow rate of 55 cfm and 18" pr. drop in pipeline( water column) or 12 m of process gas. If I select an air blower which can give 55 cfm and 18" water column, I should be able to use the blower without changing the...

Hi friends, I want to select a centrifugal blower for air at 36 atm. pr. The voulmatric flow rate for this application is about 55 cfm and pr. drop in pipe line for this flow rate is about 18". The problem is I don't know how the volumatic flow rate of a particular centrifugal blower changes...

Hi friends, I am posting this question about centrifugal blower because there is good similarity between a centrifugal pump and a centrifugal blower. I want to select a blower for a gas which is about 36 times heavier than air at 1 atm. pr. The voulmatric flow rate for this gas is about 55 cfm...

I would not be able to tell what is asked for here, but I would like to ask in addition to what Buck29 asked, that could anyone suggest where can I get a colour code for SF6 gas piping. Thanks "Knowledge is power"

Hello, (1)I am trying to write a program for serial port communication in Linux. I have created a class in which I initiallize the port parameters using a termios structure and open the port. The class also has a function which can return a FILE pointer(using fdopen) attached with the port. This...

I have developed a small module in VBA which reads the data from file and draws the spline in Autocad. There are some bugs also. If you want........ "Knowledge is power"