Permanently plug water radiator

[Safasalar]

Hello!
We are renovating the kitchen. We have a two-pipe system. We are planning to remove 3 water-based radiators and connect underfloor heating with a push from Uponor to the third. 2 radiators need to be plugged and pipe stubs of about 1.20 to 2.20 m left in the floor. Is it dangerous to leave the pipe stubs since the water cannot circulate in them (stagnant water?)?
Grateful for your opinion.

 

[GoC]

No, it is not dangerous

 

[Safasalar]

No, it's not dangerous

Thank you for your response! I believe they are copper pipes, but I can't see the rest of the pipes as they are under the raised floor with chip insulation. Will they not rust and start leaking after a few years? Please see the picture. Best regards

 

[GoC]

No, it will not start to rust.