T/CPPIA 28-2023 Construction of rigid polyvinyl chloride (PVC-U) electromagnetic shielding insulation electrical sleeve pipe

Scope

Scope: This document specifies the terms and definitions, symbols, abbreviations, materials, classification and marking, requirements, test methods, inspection rules, marking, packaging, transportation, and storage for hard polyvinyl chloride (PVC-U) electromagnetic shielding insulated electrical conduits in buildings or structures. This document applies to circular solid-wall electrical conduits (hereinafter referred to as conduits) made of PVC resin as the main raw material, with necessary additives added, including conductive materials in the inner layer, which are extruded into a double-layer structure and have electromagnetic shielding functions, used to protect electrical wires or cables in buildings or structures and ensure their wiring. Main technical contents: 6. Requirements 6.1 Appearance: The inner and outer surfaces of the conduits should be smooth, flat, and clean, without obvious scratches, uneven color, indentations, bubbles, impurities, or other defects that affect product performance. The end face of the conduit should be cut flat and perpendicular to the axis. 6.2 Color: The outer layer of the conduit is generally white or blue, and the inner layer is generally black. Other colors can be negotiated between the supplier and the buyer. 6.3 Specifications and dimensions 6.3.1 The specifications and dimensions of the conduits shall comply with Table 2. For conduits with a socket, the dimensions of the socket shall comply with Table 3. 6.3.2 The length of the conduits is generally 3 m or 4 m, and other lengths can be negotiated between the supplier and the buyer. There should be no negative deviation in the length of the conduits. 6.4 Physical and mechanical properties: The physical and mechanical properties of the conduits shall comply with Table 4. 6.5 Flame retardant performance: The flame retardant performance of the conduits shall comply with Table 5. 6.6 Electrical performance: The electrical performance of the conduits shall comply with Table

Development Information

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