NPSH

NPSH available (for suction lift situation) =

NPSH_a = Absolute Press. - Vapor Press - Line Loss - Difference in Elevation.

So for your case ..........

NPSH_A = 10.2 m - 1 m - 1 m - 4 m = 4.2 meter

NOTE: NPSH available MUST be greater that NSPH required by the pump.

Typically you want a safety factor of 1.2 so tell your supplier to give you a pump with NPSH required of 3.5 meters or less.

can i get detail information for selection of pump

on any site of pump manufacture or any way.

I just stumbled across another really good site with a book for download:

http://www.lightmypump.com/pump_book.htm

how can i select expansion joint or non rigid coupling.

it is recommended that a pipe anchor be installed between it and the pump.

what is this pipe anchor?

It would probably be best to start a new thread on this topic, but, oh well - here goes:

1. In order to select an expansion joint, or non-rigid coupling you need to know through stress analysis (see below) what displacements your pipe system is experiencing (axial/lateral/angular).
2. A pipe anchor would be recommended in between to ensure that no excessive loads are transmitted through the piping to the pump. Stress on the pump leads to premature bearing/sealing failure. An example of a simple, rigid pipe anchor would be to weld on sufficiently strong lugs to your pipe and anchor bolt them into concrete.
3. There is one mind-set of maintenance/piping design that it is best to avoid the use of expansion joints/non-rigid couplings because they can be a headache/prone to failure and leaking. You avoid there use through proper piping design by adding enough flexibility into your system.
4. Piping stress analysis is an art/engineering field itself and should be done to the applicable code. Much too big of a topic to do it justice here. These days computer software such as Coade's Caesar are used for the design. Smaller systems can still be done by hand, but more complex systems are best left to computers.