T/GZHG 025-2021 Polypropylene (modified anhydrous phosphorus gypsum) square double-walled corrugated power tube

Scope

Main Technical Content: 5. Technical Requirements 5.1 Raw Material Requirements The square double-wall corrugated power pipe made of modified polypropylene (modified anhydrous phosphogypsum) is manufactured using modified polypropylene as the main raw material, with anhydrous phosphogypsum, anti-aging agents, lubricants, color masterbatches, and other additives as auxiliary materials. It is extruded into a new type of power sheathing pipe that meets the requirements of this document. The phosphogypsum added to the modified material should be anhydrous phosphogypsum, with an addition amount (mass fraction) of 10%-20%. The fineness should be 800 mesh, and the performance requirements 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, indentations, impurities, or uneven color. The ends of the pipe should be cut flat and perpendicular to the pipe axis. 5.3 Specifications and Tolerances The specification dimensions and tolerances shall comply with Table 1. The specification dimensions and tolerances of square pipes shall comply with Table 2. Table 2: Specification Dimensions and Tolerances Specification DN × W1/mm × mm Average Inner Diameter Do/mm Square Pipe Width W1/mm Minimum Laminated Wall Thickness t/mm Square Pipe Peak Width W2/mm Basic Dimension Limit Deviation Basic Dimension Limit Deviation Basic Dimension Limit Deviation Basic Dimension Limit Deviation 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 + 0.328 175 (208×208) 175 + 4 208 + 4 2.5 + 0.342 4 Other specifications shall be agreed upon by the supplier and the buyer. 5.4 Pipe Length The length of the square pipe is generally 6.20m, or as agreed upon by the supplier and the buyer. The pipe length shall include the length of the socket part,

Development Information

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