T/GZHG 011-2022 Active Group standards

T/GZHG 011-2022 Nano-modified Polypropylene (HPPM) Square Power DUAL-WALL Ribbed Pipe and Pipe Fitting

Publish Date: 2022-01-05 Implement Date: 2022-01-05 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/GZHG 011-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Synthetic materials

ICS Name: Chemical production

Publish Date: 2022-01-05

Implement Date: 2022-01-05

Scope

Main Technical Content: 5. Technical Requirements 5.1 The inner and outer surfaces of the pipes shall be clean and smooth, with no bubbles, obvious scratches, indentations, impurities, or color unevenness. The pipe ends shall be cut flat and perpendicular to the pipe axis. 5.2 Dimensional Specifications The dimensional specifications and tolerances shall comply with Table 1. 5.3 Length of Square HPPM Power Double-Wall Corrugated Pipes The length of Square HPPM Power Double-Wall Corrugated Pipes is generally 6.20m, or as agreed upon by the supplier and purchaser. The length of the pipe shall include 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 Square HPPM Power Double-Wall Corrugated Pipes shall comply with the requirements in Table 2. Table 2 Physical and Mechanical Property Items Unit Indicators External Pressure Load Resistance N≥3000 Flat Test/Vertical Direction Deformation of 40% immediately after unloading without cracking. Impact Test/10/10 Pass, no cracks or leaks on the inner or outer walls. Longitudinal Shrinkage Rate ≤3% Vicat Softening Temperature ≥135°C Volume Resistivity ≥1×1011Ω·m Vertical Flammability/V-2 No leakage in the connection seal. 6. Test Methods 6.1 State Adjustment Unless otherwise specified, the specimens shall be conditioned at (23±2)°C for at least 24 hours and tested under the same conditions. 6.2 Visual Inspection The inner and outer surfaces and both ends of the Square HPPM Power Double-Wall Corrugated Pipes shall be visually inspected. 6.3 Dimensional Specifications 6.3.1 Average Inner Diameter and Tolerance The average inner diameter shall be measured according to GB/T 8806-2008, and the average inner diameter tolerance shall be calculated. 6.3.2 Width of Square Pipes The width of the square pipes shall be measured according to GB/T 8806-200