T/SGX 009-2021 High-density polyethylene (HDPE) plastic tubing is used for buried power cables

Scope

Scope: This document specifies the terms and definitions, symbols and abbreviations, product classification and marking, technical requirements, test methods, inspection rules, marking, transportation and storage of plastic casings (hereinafter referred to as casings) extruded from high-density polyethylene (HDPE) as the main raw material, with the addition of necessary additives. This document is applicable to buried high-density polyethylene (HDPE) plastic casings, which can be used for excavated or non-excavated power cable casings. Main technical content: - Requirements for the physical and mechanical properties of casings: Ring stiffness (kN/m2): SN8 ≥ 8, SN10 ≥ 10, SN12.5 ≥ 12.5, SN16 ≥ 16, SN24 ≥ 24 - Density (g/cm3): 0.93~0.97 - Vicat softening temperature (℃): A method, ≥ 120 - Flatness test requirements: Compression deformation amount equal to 50% of the outer diameter, no cracking or separation - Hammer impact test requirements: 10 impacts without cracking - Tensile strength (MPa): Casing tensile strength: ≥ 18; Electrofusion joint tensile strength: ≥ 18; Butt fusion joint tensile strength: ≥ 18 - Elongation at break (%) requirements: ≥ 350 - Oxidation induction time (min): 210℃, ≥ 20

Development Information

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