T/GZHG 023-2022 Polyethylene (modified anhydrous gypsum) double-wave peak reinforced drainage pipe

Scope

Main Technical Content: 5. Technical Requirements 5.1 Raw Material Requirements The phosphogypsum added to the modified materials shall be anhydrous phosphogypsum, with an addition amount (mass fraction) of more than 8%. The fineness shall be 800 mesh, and all performance indicators of the anhydrous phosphogypsum shall comply with the provisions of T/GZHG 026-2020. 5.2 Color The colors of the inner and outer layers of the color pipe shall be uniform and consistent. The color is generally green, which can be agreed upon by both the supplier and the buyer. 5.3 Appearance The inner and outer walls of the pipe shall be smooth and flat, without bubbles, cracks, obvious scratches, concavities, or discoloration lines. There shall be no ventilation grooves. The end face of the sleeve pipe shall be cut flat and perpendicular to the axis. 5.4 Length The length of the pipe shall generally be 6m, which can also be agreed upon by both the supplier and the buyer. The length of the pipe shall include the length of the socket part. The length of the pipe shall not have a negative deviation. 5.5 Dimensions The dimensions of the pipe shall comply with the requirements of Table 1. Table 1 Unit: mm Nominal inner diameter DN/ID Minimum average inner diameter dim, min Minimum laminated wall thickness e1 min Inner wall thickness e min Minimum joint length A min Minimum "U"-shaped groove depth H min Minimum socket wall thickness e2 200 195 2.0 1.6 90 5.0 300 294 2.5 1.7 95 3.0 400 392 3.2 7.0 600 588 4.5 3.0 858.0 4.0 800 785 4.5 5.6 Classification The pipes are classified according to their ring stiffness, as shown in Table 2. Table 2 Nominal ring stiffness grade SN8 SN10 SN12.5 Ring stiffness/(kN/m2) 8 10 12.5 5.7 Physical and Mechanical Properties 5.7.1 The physical and mechanical properties of the polyethylene (anhydrous phosphogypsum) composite modified m

Development Information

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