Part of the regulations stipulates the product classification, requirements, test methods, inspection rules and regulations for extruded porous integrated plastic pipes for buried communications using polyethylene resin as the main raw material - polyethylene porous integrated pipes (hereinafter referred to as "pipes"). Marking, packaging, transportation, storage. Some duct systems are suitable for outdoor buried communication cables and optical cables.
QB/T 2667.2-2004 history
2004QB/T 2667.2-2004 Buried multi-hole plastics pipes for communication Part 1: Polyethylene (PE) multi-hole pipes