Is your e-pipe equipped with some control chip?
No. My e-pipes are mechanical mods but in a button is fuse to protect the user from shorting the battery.
Can I use any atomizer with your e-pipe?
Short answer is yes. As long as you keep the coil resistance above 0,6 Ohm it will work. But big atomizers can disturb overall design of the pipe and also you have to have the right mouthpiece for your tank.
Is the 18350 Battery strong enough?
Yes. My experience is that with right cell it is enough for one 2ml full tank with 1,5 Ohm coil.