T/SCSX 0301-2025 Ground-buried drainage FRPO composite reinforced hollow woven pipe

Scope

When in use, underground drainage pipes are subject to certain external pressure loads and are deeply buried in the ground, affected by geological and soil environmental factors. Therefore, the key requirements for pipe design are to achieve low-carbon environmental protection while ensuring ring stiffness, ring flexibility, impact performance, anti-aging performance, and acid/alkali and corrosion resistance. FRPO composite reinforced hollow-wound pipes, as a product with unique production processes, are made by blending and modifying polyolefins with nano-materials and impact modifiers, and then extruding them into rectangular pipes through a winding process. The inner and outer walls of the pipes are smooth and flat. On the inner wall, a modified polyolefin impact-resistant material is added to enhance the pipes' wear resistance and corrosion resistance, prolonging their service life. On the outer wall, a secondary polypropylene composite winding reinforcement is used, which greatly improves the pipes' compressive, bending, and tensile strength, as well as their inner pressure-bearing and winding joint strength. This standard specifies the terms and definitions, symbols, materials, pipe classification and marking, structural types and connection methods, requirements, test methods, inspection rules, and marking for FRPO composite reinforced hollow-wound pipes (hereinafter referred to as pipes). This standard applies to hollow-wound pipes with a rectangular cross-section made from modified polypropylene extrusion and a modified polyolefin impact-resistant material on the inner wall, and a secondary polypropylene composite winding reinforcement on the outer wall. The pipes specified in this standard are suitable for long-term conveying of media with a temperature below 45°C in non-pressurized or low-pressure (0.4MPa) underground urban drainage, industrial drainage, and agricultural drainage projects.

Development Information

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