putkikoko
Putkikoko is a Finnish term that translates to pipe size. It denotes the size designation used for pipes and tubing in plumbing, heating, and mechanical systems. The concept centers on dimensions such as the nominal diameter (DN), the outer diameter (OD), and the wall thickness. The selected putkoko ensures compatibility with fittings, valves, and flanges and influences flow capacity and pressure rating.
In practice, putkikoko is specified in different ways depending on the material and standard. Nominal diameter
Common pipe materials include steel, stainless steel, copper, PVC, and polyethylene. The pipe size therefore affects
Manufacturers and standard bodies publish catalogs listing putkoko options for each product family. Designers and installers