rury PE i PEX

http://www.mpj.pl/Rury-pe-do-gazu,pl,site,166,0,158.html

This could include rectangular shaped conduits or the annular shape for flow in a double pipe heat exchanger. Seamless Pipe is made when steel in a solid, round cylindrical shape, called a billet or a tube round is heated and then either pushed or pulled while being rapidly rotated.