T/GZPPIA 002-2023 Modified Polypropylene Double-Color Composite Biaxial-Tensioned Corrugated Pipe

Scope

Main Technical Content: 4. Materials 4.1 Overview The raw materials used for producing pipe materials should mainly be polypropylene (PP), with the addition of appropriate reinforcing materials, a small amount of nucleating agents, and other modifying additives. The additives should be evenly dispersed. The content of polypropylene (PP) resin (by mass fraction) shall not be less than 68%. 4.2 Polypropylene (PP) Resin The performance of polypropylene (PP) resin shall comply with the requirements specified in Table 1. Table 1: Requirements for Raw Material Performance Serial Number Item Testing Method 1 Melt Flow Rate (MFR) (2.16 kg, 230°C) ≤ 1.3 g/10 min GB/T 3682.2 2 Thermal Stability (Oxidation Induction Time, 200°C) ≥ 20 min GB/T 19466 3 Tensile Strength ≥ 25 MPa GB/T 1040 4 Bending Modulus ≥ 1800 MPa GB/T 9341 4.3 Recycled Materials Within the scope of not affecting product performance, clean recycled materials from the same type of pipe produced by the manufacturer can be used. 4.4 Elastic Sealing Rings The elastic sealing rings shall comply with the requirements specified in GB/T 21873. 5. Product Classification and Marking 5.1 Classification 5.1.1 Pipe materials are classified by ring stiffness, as shown in Table 2. Table 2: Nominal Ring Stiffness Grades Grade SN8 SN10 SN12.5 SN16 Ring Stiffness/ (kN/m2) 8 10 12.5 16 Note: Other grade requirements can be negotiated between the supplier and the purchaser. 5.1.2 Pipe materials are divided into internal diameter series and external diameter series. The pipe materials specified in this document belong to the internal diameter series, which is indicated by the nominal internal diameter DN/ID. 5.2 Marking Example of marking: For a pipe with a nominal internal diameter of 500mm and a ring stiffness grade of SN12.5, the marking is as follows: Double-wall corrugated pipe PP DN/ID 500 SN12.5 6. Pipe Structure and Conn

Development Information

Related Standards