T/GZHG 005-2019 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 should be clean and smooth, with no bubbles, obvious scratches, indentations, impurities, or color unevenness. The pipe ends should be cut flat and perpendicular to the pipe axis. 5.2 Dimensional Specifications The dimensional specifications and deviations 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 is generally 6.2m, which can 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 deviation limit shall be +0.5% of the 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 Items Unit Indicator External Pressure Load Performance N/200mm ≥5000 Ring Segment Hot Compression Force kN/200mm ≥1.0 Flat Test/Vertical Direction When the deformation amount reaches 40%, immediately unload the sample without cracking. The recovery rate shall be ≥95%, and the sample shall not crack. Fall Hammer Impact Test The sample passes the test with no cracks or breaks on the inner and outer walls. Longitudinal Shrinkage Rate % ≤3 Vicat Softening Temperature ℃ ≥135 Volume Resistivity Ω·m ≥1×1011 Combustion Performance V-0, with allowable dripping Connection Sealing Performance No leakage or seepage on the sample 6. Test Methods 6.1 State Adjustment Except for special provisions, the specimens shall be subjected to state adjustment under the conditions of (23±2)℃ for no less than 24 hours, and the tests shall be conducted under the same conditions. 6.2 Visual Inspection of Appearance The inner and outer surfaces and both ends of t

Development Information

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