T/GZHG 004-2020 Nano-modified Polypropylene (HPPM) Square Power Duct Double-Wallcorrugated Pipe

Scope

Main Technical Content: 5. Technical Requirements 5.1 The inner and outer surfaces of the pipes shall be clean and smooth, with no air bubbles, obvious scratches, indentations, impurities, or uneven coloration. The pipe ends shall be cut flat and perpendicular to the pipe axis. 5.2 Specifications and Tolerances The specifications and tolerances shall comply with Table 1. 5.3 Length of Square HPPM Power Double-Wall Corrugated Pipes The length of the Square HPPM Power Double-Wall Corrugated Pipes shall generally be 6.2m, which may be agreed upon by both parties. The length of the Square HPPM Power Double-Wall Corrugated Pipes shall include the length of the socket portion, and the length tolerance shall be ±0.5% of the total length. 5.4 Physical and Mechanical Properties The physical and mechanical properties of the Square HPPM Power Double-Wall Corrugated Pipes shall comply with the requirements of Table 2. Table 2: Physical and Mechanical Property Specifications Unit Indicator External Pressure Load Performance N/200mm ≥5000 Ring Section Heat Compression Force kN/200mm ≥1.0 Flat Test/Vertical Directional Deformation 40% Immediate unloading without cracking Drop Hammer Impact Test 10/10 pass, no cracks or leaks on inner/outer walls Longitudinal Shrinkage Rate ≤3% Vicat Softening Temperature ℃ ≥135 Volume Resistivity Ω·m ≥1×1011 Combustion Performance V-0, no dripping allowed Connection Sealing Performance No leakage on samples 6. Test Methods 6.1 Conditioning Unless otherwise specified, the specimens shall be conditioned at (23±2)°C for at least 24 hours prior to testing, and the tests shall be conducted under the same conditions. 6.2 Appearance Inspection Inspect the inner and outer surfaces and both ends of the Square HPPM Power Double-Wall Corrugated Pipes visually. 6.3 Specifications 6.3.1 Average Inner Diameter and Tolerances Measure the average inner diameter and calculate the a

Development Information

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