T/CPPIA 26-2023 Polyester-reinforced composite pipe head。

Scope

Scope: This document specifies the terms, definitions, and symbols of polyester-reinforced composite pipe jacking pipes (hereinafter referred to as pipes), materials, classification and marking, specification dimensions and deviations, and physical and mechanical performance requirements. It describes the corresponding test methods and stipulates the inspection rules and marking, transportation, and storage requirements. This document applies to polyester-reinforced composite pipe jacking pipes used in underground rainwater and sewage drainage pipeline projects by the jacking method, with a nominal size of 300 mm to 800 mm. Main technical contents: 7.1 Color: The color of the pipes is generally the color of the material. Other colors shall be determined by negotiation between the supplier and the buyer. 7.2 Appearance: The inner surface of the pipes should be smooth and flat, and the color of the pipes should be uniform. There should be no visible air holes or cracks on the inner and outer walls of the pipes. The end face should be flat and free from burrs. 7.3 Dimensions 7.3.1 Length: The effective length of the pipes is generally 1 m, with an allowable deviation of ±5 mm. Other lengths and their allowable deviations shall be determined by negotiation between the supplier and the buyer. 7.3.2 Dimensions and deviations: The dimensions and deviations of the pipes shall comply with the provisions in Table 2. 7.3.3 Verticality of the pipe end face: For pipes without installed sleeves, the outer diameter end face shall meet the requirements of Figure 3, and the verticality d1 shall comply with the values specified in Table 3. 7.4 Connection sleeves: The wall thickness and length of the sleeves shall meet the requirements of Table 4. 7.5 Hardness: The Barcol hardness of the structural layer of the pipes shall not be less than 40. 7.6 Water absorption: The mass change rate shall not exceed 0.3%. 7.7 Acid and alkali resistance: The mass change rat

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