T/GZHG 014-2022 Modified Polyvinyl Chloride (MPVC) Double Wall Corrugated Pipe for Electricity and Communication Cable Protection

Scope

Main Technical Content: 5. Technical Requirements 5.1 Raw Material Requirements The materials used for the production of MPVC double-wall corrugated pipes shall be primarily polyvinyl chloride (PVC), which may be supplemented with additives to improve the processing and physical-mechanical properties of the pipes. MBS-modified PVC shall not contain plasticizers, and the filler content shall not exceed 5%. 5.2 Product Requirements 5.2.1 Color, Appearance, and Dimensions 5.2.1.1 Color The color of the pipes shall generally be orange. Other colors may be determined by mutual agreement between the supplier and the purchaser, and the color shall be uniform and consistent. 5.2.1.2 Appearance The inner and outer walls of PVC-M double-wall corrugated pipes shall not have bubbles, cracks, obvious impurities, decomposition discoloration lines, or irregular corrugations. The inner wall shall be smooth and flat. 5.2.1.3 Dimensions and Tolerances The dimensions and tolerances shall comply with Table 1. The length is generally 6.2m, which can be determined by mutual agreement between the supplier and the purchaser. The length shall not have negative deviations. 5.2.2 Technical Performance 5.2.2.1 The physical and mechanical properties of MPVC double-wall corrugated pipes shall comply with Table 2. Table 2: Physical and Mechanical Properties of MPVC Double-Wall Corrugated Pipes **Item** **Unit** **Technical Specifications** **Test Methods** **Density** kg/m3 ≤ 1,500 6.3 **Vickers Softening Temperature** ℃ ≥ 80 6.4 **Oven Test** - No delamination or cracking 6.5 **Flat Test** - The sample shall not show cracking, delamination, or peeling 6.6 **Ring Stiffness** SN 24 kN/m2 ≥ 24 6.7 **SN 32** ≥ 32 6.8 **SN 40** ≥ 40 6.9 **Flame Retardancy Rating** - V-0, no dripping 6.10 **Volume Resistivity** Ω·m ≥ 1 × 1011 6.11 **Static Friction Coefficient** - ≤ 0.35 6.12 **Connection Sealin

Development Information

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