Steel is used in water pipes.
Galvanized steel is used to same as steel but it has better protection from oxidation.
Chrome copper is used to same as copper pipes but it has a chromium coating and it is mostly used in bathroom surface pipes.
Stainless steel is used in water and gas pipes. Stainless doesn't rust.
Good work Joonas :) Remember to write all blog in english, also your work placement diary.
VastaaPoista