Pressure of Water in Pipe Calculation

It is not possible to answer the question, as the configuration and condition of the pipe is not known. It is pressure drop through the pipe from one end to the other that is of interest, and not the pressure that is in it at any particular place.

Consult a qualified Piping Designer, if the resource to carry out this piece of work is not available in-house.

I agree with Slack..... You have no idea what you are doing and this is probably your first piping system design. You need an engineer

If the purpose of this system is to provide cooling, it is probably a close loop system with an expansion tank, coolers, pumps, temperature and pressure indication.

The system like this must maintain a certain flow at a maximum temperature. To maintain this flow, the pumps must be sized to overcome the inherent pressure drop THROUGHOUT THE SYSTEM !

This means a pressure drop calculation must be made of the entire circuit and that calculated total drop must be compared against the pump performance curves to ensure that (1) the required flow will be met and (2) the pump is operating within the acceptable range.

Additionally, the pump NPSHa must be evaluated at the maximum expected fluid temperature

The particular pressure at any point in the system during operation is immaterial.

Get some help...

Agreed!!!

As per manual 75 GPM not pressure.

You can not equate one to the other with out knowing the restrictions on the fluid flow.

Best to use a flow gauge then a pressure gauge.

This should get you close enough.

Dear Sir

Basically we are in motor and generators repair line.The said ECB is used in offshore industries and we repair ECBS.The problem in ECBS due to more pressure of water in jacket which is meant for cooling the coils, water leaks through bearing housings and bearing grease get mixed with water. The graph shown more or less the same pattern as shown in the manual.We do understand pressure calculation need more parameters.Water after some level inside the jacket flows out thro outlet of 10 cm dia and the temperature of water inside the jacket has to be maintained not more than 100 degree F.Is there any way to know the water pressure inside the jacket and pipe line

Regards

Sadasivam

Manometer!

This should get you the required information.

If it is outside the organisation's main line of business and the expertise is not available in house, then hire someone.

What bearing housings would be located inside a closed loop cooling jacket?

YES bearing housings are located at DE and NDE in side chamber of water jacket having overflow outlet.Overflow outlet is at the half height of chamber.Inside brake assy rotates at 600 RPM and water flashes inside chamber while rotating inside sealed brake coil assy

Regards

Sadasivam

Did you design this assembly?

Most water cooled equipment/devices come with an Installation Operation Manual (IOM) that contains all specifications you need to know.

If you are not exceeding the manufacturer's maximum cooling water pressure specification and the machine is suffering internal or external leaks, then there are other internal restrictions and/or mechanical damage that must be repaired.

It is also possible that the machine/device is of poor design which negates any real solutions other than a re-design.

If you do not have a factory IOM, the field services division should be able to provide the information you need or you may be able to download it off their website.

Be prepared to pay a modest fee for the information and/or technical support you need.