T/GZPPIA 002-2020 Modified Polypropylene Double-Color Composite Ribbed Tubing

Scope

Main Technical Content: 4.4 Technical Requirements 4.4.1 The colors of the inner and outer layers of the color pipe shall be uniform and consistent. The outer layer shall be blue, and the inner layer shall be white. Other colors may be determined through consultation between the supplier and the buyer. 4.4.2 Appearance The inner and outer walls of the pipe shall not have bubbles, indentations, obvious impurities, or irregular ripples. The two ends of the pipe shall be flat, perpendicular to the axis, and located in the trough area. The inner and outer walls of the trough area of the pipe shall be tightly welded and there shall be no separation. 4.4.3 Specifications The dimensions of the pipe shall be expressed in terms of nominal inner diameter (DN/ID). 4.4.3.1 Length The effective length of the pipe L shall generally be 6m, and other lengths shall be determined through consultation between the supplier and the buyer. 4.4.3.2 Dimensions a) The dimensions of the conventional pipe shall comply with Table 3. The dimensions of the reinforced pipe shall comply with Table 4, and the minimum average inner diameter of the socket shall not be less than the maximum average outer diameter of the pipe. Table 3 Dimensions of Conventional Pipes Unit: mm Nominal Inner Diameter (DN/ID) Minimum Average Inner Diameter (dim, min) Minimum Laminated Wall Thickness (emin) Minimum Inner Layer Wall Thickness (e1, min) Minimum Joint Length (Amin) 100 95 1.00 0.832 125 201 2.10 150 145 1.30 430 294 2.01 400 394 2.51 500 495 3.0 1180 1000 985 5.0 4.0 1401 200 1185 5.0 4.0 162 Table 4 Dimensions of Reinforced Pipes Unit: mm Nominal Inner Diameter (DN/ID) Minimum Average Inner Diameter (din, min) Minimum Laminated Wall Thickness (emin) Minimum Inner Layer Wall Thickness (eI, min) Minimum Joint Length (Amin) 100 95 1.00 0.832 125 201 2.25 500 490 3.0 1.15 425 210

Development Information

Related Standards