This standard specifies the terms and definitions, symbols, classification and marking, structure and materials, specifications, requirements, test methods, inspection rules, marking, transportation and storage of ultra-high molecular weight polyethylene steel skeleton composite pipes (hereinafter referred to as composite pipes). This standard applies to pipes for the transportation of urban water supply, building water supply, fire water supply, and special fluids (including suitable industrial wastewater, corrosive gas slurries, solid powders, etc.). It is also applicable to the transportation of oil, gas and sewage in the petroleum and natural gas industries. Mixed transmission composite pipes, urban gas can be used as a reference. The transport medium temperature of composite pipe is suitable for -40 ℃ ~ 65 ℃.