Classification of nano-antibacterial composite pipes, requirements for nano-antibacterial rigid wire skeleton (polyethylene) composite pipes, requirements for nano-antibacterial PP (PE) composite pipes and fittings, classification and models of nano-antibacterial embedded composite steel pipes and fittings, nano-antibacterial embedded composite pipes Technical requirements for steel pipes and pipe fittings, test methods for nano-antibacterial embedded composite steel pipes and pipe fittings