Electromagnetic coil

[bird777]

Hello,

I need for an electromagnet that can be moving an iron pipe inside when I connect power to the coil. When power off a spring push the iron pipe back.
How can I calculate the turns of coil, the current, the wire square and the spring's force? I am going to use 48 V DC.
I know the weight of pipe and its dimensions.

Bird

 

[Boncuk]

I know the weight of pipe and its dimensions.Bird

OK, keep them secret!

 

[bird777]

sorry

Sorry I don't think that is important , but here is it:

The pipe diameter is 80 mm, length is 30 mm.
Is it important the thikness of the pipe wall ? Because a plastic part will be inside of the pipe.

 

[Roff]

Does the pipe encounter any friction when it is moved? How far do you want to move it, and how fast?

 

[Boncuk]

Does the pipe encounter any friction when it is moved? How far do you want to move it, and how fast?

and which direction: horizontal or vertical?

With a diameter of 80mm and a length of 30mm I wouldn't talk about a pipe. The stroke must not be more than half the length for longitudinal stability.
The weight would be interesting to know, too.