T/GZHG 012-2020 Modified Polypropylene (GFHB) Square Power Single-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 bubbles, obvious scratches, indentations, impurities, or color unevenness. The ends of the pipes 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 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 purchaser. The length of GFHB square power single-wall corrugated pipes shall include the length of the socket part, and the length deviation shall be within ±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 properties Unit Indicator External pressure resistance N≥3000 Flat test/When the deformation amount in the vertical direction reaches 40%, immediately unload the sample without cracking. Drop hammer impact test/The sample passes the test with 10/10 passes, and there shall be no cracks or ruptures on the inner and outer walls of the sample. Longitudinal shrinkage rate ≤3% Vicat softening temperature ℃≥135 Volume resistivity Ω·m≥1×1011 Vertical combustion/V-2 connection sealing/The sample has no leakage or seepage.

Development Information

Related Standards