T/GDC 364-2026 MPolyethylene (HDPE) double-layered,hollow,crack-resistant reinforced pipe for underground use

Scope

This document specifies the terms and definitions, symbols, abbreviations, raw materials, pipe grading and marking, pipe structure and connection methods, technical requirements, test methods, inspection rules and markings, transportation and storage for HDPE double-layer hollow anti-crack reinforced Klaw pipes used in underground applications. This document is applicable to structural wall pipes made by the winding forming process, which are mainly made of polyethylene (PE) resin and supplemented with an "O"-type polypropylene (PP) pipe as a supporting structure. The pipes are bent synchronously, wound, and welded to the double-layer multi-cavity structure at the jointed irregular location. The pipes specified in this document are suitable for long-term underground applications such as drainage and sewage discharge, where the medium temperature is below 45°C. Terms and definitions, symbols, abbreviations, raw materials, pipe grading and marking, pipe structure and connection methods, technical requirements, test methods, inspection rules and markings, transportation and storage for HDPE double-layer hollow anti-crack reinforced Klaw pipes used in underground applications.

Development Information

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