What materials are used for air conditioning and ventilation pipes?

Air conditioning ventilation ducts are generally divided into three materials: white iron (galvanized) ventilation ducts, FRP ventilation ducts and composite ventilation ducts.

Polyurethane pipes are generally used for environmental protection, and phenolic pipes have low cost.

Galvanized pipes are widely used in Beijing, and composite wind pipes are widely used in Shanghai and Guangzhou.

Ventilation pipe is a metal or nonmetal pipe used in ventilation and air conditioning engineering of industrial and civil buildings, and it is a municipal infrastructure to make air circulate and reduce the concentration of harmful gases.

The main finished materials used in the manufacture and installation of air ducts, such as plates and profiles, shall conform to the current national design standards and the provisions of related products, and pass the ex-factory inspection. When materials enter the site, they shall be accepted according to the current national standards.