T/GZHG 035-2024 Polyvinyl chloride-modified anhydrous calcium sulfate double-walled corrugated drainage pipe

Scope

Main Technical Content: 8.1 Appearance The inner and outer walls of the pipe shall not have bubbles, indentations, obvious impurities, or irregular corrugations. The two ends of the pipe should be flat and perpendicular to the axis, with the socket end located in the trough area. The inner and outer walls of the trough area of the pipe should be tightly welded and not show any loosening. 8.2 Color The color of the pipe is generally light pink. Color variations are allowed between batches, and the color and color variation between batches can be agreed upon by the supplier and the buyer. 8.3 Specifications 8.3.1 Pipe length The pipe length is generally 6 m, but can be agreed upon by the supplier and the buyer. The length of the sleeve should include the length of the socket, with a maximum deviation of ±0.5% of the length. 8.3.2 Pipe dimensions The pipe dimensions should meet the requirements of Table 2, and the minimum average inner diameter of the socket should not be less than the maximum average outer diameter of the pipe's insertion end. Table 2: Pipe Dimensions (units: mm) Specification Minimum average outer diameter (dem, min) Maximum average outer diameter (dem, max) Minimum average inner diameter (dim, min) Minimum laminated wall thickness (emin) Minimum inner layer wall thickness (e1, min) Minimum outer layer wall thickness (e2, min) Minimum joint length (A, min) 110 109 11 10.49 0.8 0.64 200 198 8 16 5 0.9 50 250 248.5 250.2 16 1.1 530 626 63.1 3.3 2 1 1000 994 103 854 4.0 2.6 308.4 The physical and mechanical properties of the pipe should meet the requirements of Table 3. Table 3: Physical and Mechanical Properties of the Pipe Item Indicator 1 Bending stiffness/kN/SN ≥4 ≥6 ≥8 ≥12.5 2 Drop hammer impact test (TIR) ≤10% 3 Flexibility test of the specimen Smooth, no cracks, no loosening on both walls DN/OD ≤400 No reverse bend

Development Information

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