T/GZHG 025-2022 Polypropylene (Modified anhydrous Portland gypsum) Square Double Wall Corrugated Power Pipe

Scope

Main Technical Content: 5. Technical Requirements 5.1 Raw Material Requirements The square double-wall corrugated power conduit pipe made of modified polypropylene (modified anhydrous phosphogypsum) is a new type of power protection pipe material made of modified polypropylene as the main raw material and auxiliary materials such as anhydrous phosphogypsum, anti-aging agents, lubricants, and color masterbatches. It is extruded into a shape that meets the requirements of this document. The phosphogypsum added to the modified material is anhydrous phosphogypsum. The addition amount of anhydrous phosphogypsum (mass fraction) is between 10% and 20%, with a fineness of 800 mesh. All performance indicators of anhydrous phosphogypsum shall comply with the provisions of T/GZHG 026-2020. 5.2 Appearance The inner and outer surfaces of the pipe should be clean and smooth, without bubbles, obvious scratches, depressions, impurities, or uneven coloration. The ends of the pipe should be cut flat and perpendicular to the pipe axis. 5.3 Specifications and Tolerances The specifications and tolerances of the pipe shall comply with Table 1. Table 1: Specifications and Tolerances Specification DN × W1/mm × mm Average Inner Diameter Do/mm Pipe Width W1/mm Minimum Laminated Wall Thickness t/mm Pipe Peak Width W2/mm Basic Dimensional Tolerances Basic Dimensional Tolerances Basic Dimensional Tolerances 100 (123 × 123) 100 + 2 123 + 2 1.8 + 0.22 21 + 2 150 (181 × 181) 150 + 3 181 + 3 2.3 + 0.328 3 + 3 175 (208 × 208) 175 + 4 208 + 4 2.5 + 0.342 200 (250 × 250) 200 + 4 42.5 + 0.358 Other specifications shall be agreed upon by the supplier and the buyer. 5.4 Pipe Length The length of the pipe is generally 6.20m, or as agreed upon by the supplier and the buyer. The length of the pipe shall include the length of the socket part, and the length tolerance shall be +0.5% of the total length. 5.5 Physical and Mech

Development Information

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