T/ACCEM 574-2025 HDMP (modified anhydrous phosphogypsum) double-wave steel strip reinforced composite pipe
T/ACCEM 574-2025
Basic Information
Scope
Main technical content: This document specifies the symbols and abbreviations, raw materials, classification and marking, requirements, test methods, inspection rules, and marking, transportation, and storage of HDMP (modified anhydrous phosphogypsum) double-wave steel-belt reinforced composite pipes (hereinafter referred to as "composite pipes"). This document is applicable to HDMP double-wave steel-belt reinforced composite pipes for underground drainage, which are made by using modified polypropylene resin and polyvinyl chloride as the matrix, adding a proper amount of modified anhydrous phosphogypsum, and using M-type galvanized steel belts as the main supporting structure. These pipes are wrapped and molded by a multi-layer co-extrusion process. This document is also applicable to non-pressure underground drainage and sewage pipes with a long-term use temperature not exceeding 45 ℃.