T/GZHG 012-2022 Modified Polypropylene (GFHB) Square Single-Wall Ribbed Pipe。

Scope

Main Technical Content: 5. Technical Requirements 5.1 Appearance The inner and outer surfaces of the pipes shall be clean, smooth, free from bubbles, obvious scratches, indentations, impurities, or color unevenness. The pipe ends shall be cut flat and perpendicular to the pipe axis. 5.2 Specifications and Tolerances The specification dimensions and tolerances shall comply with Table 1. 5.3 Length of Square Pipes The length of GFHB square power single-wall corrugated pipes is generally 6.2m, which can be determined by mutual agreement between the supplier and the buyer. The length of GFHB square power single-wall corrugated pipes shall include the length of the socket part, and the length tolerance shall be ±0.5% of the total length. 5.4 Physical and Mechanical Properties The physical and mechanical properties of GFHB square power single-wall corrugated pipes shall comply with the requirements of Table 2. Table 2: Physical and Mechanical Property Specifications Unit Indicators External Pressure Load Performance N≥3000 Flat Test/ Vertical Direction Deformation amount of 40% when immediately unloaded without cracking. Fall Hammer Impact Test/ 10/10 pass, no cracks or leaks on the inner and outer walls. Longitudinal Shrinkage Rate ≤3% Vicat Softening Temperature ≥135°C Volume Resistivity ≥1×1011Ω·m Vertical Flammability/ V-2 Connection Sealing/ No leakage on the sample. 6. Test Methods 6.1 Conditioning Unless otherwise specified, the specimens shall be conditioned at (23±2)°C for at least 24 hours in accordance with GB/T 2918-2018, and the tests shall be conducted under the same conditions. 6.2 Visual Inspection The inner and outer surfaces and both ends of the GFHB square power single-wall corrugated pipes shall be visually inspected. 6.3 Specification Dimensions 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 diam

Development Information

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