T/GZHG 030-2022 Active Group standards

T/GZHG 030-2022 Unsaturated phosphoric acid slaked lime modified high density polyethylene double walled corrugated drainage pipe

Publish Date: 2022-05-09 Implement Date: 2022-05-09 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/GZHG 030-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Other rubber and plastic products

Publish Date: 2022-05-09

Implement Date: 2022-05-09

Scope

Main Technical Content: 4.7 **Physical and Mechanical Performance of Pipes**: The physical and mechanical properties of the pipes shall comply with the requirements specified in Table 3. **Table 3** **Item** **Target Value** **Ring Stiffness/kN/mm** SN8≥8 SN10≥10 SN12.5≥12.5 **Drop Hammer Impact Test**: Pass with 10/10 results. The ring flexibility specimen should be smooth, without reverse bending or cracking, and there should be no separation between the two walls. **Oven Test**: No air bubbles, no delamination, no cracking. **Creep Ratio**: ≤4%. **Oxidation Induction Time**: ≥20 minutes. **5. Test Methods** 5.1 **Conditioning and Test Environment**: The samples shall be conditioned and tested at a temperature of (23±2)°C and a relative humidity of (50±2)% for at least 24 hours. For pipes with a nominal inner diameter greater than 600mm, the conditioning time shall be at least 48 hours. 5.2 **Appearance and Dimension Measurement**: 5.2.1 **Appearance**: Follow the requirements specified in GB/T 19472.1-2019, Clause 8.2. 5.2.2 **Dimension**: Measure the effective length, average outer diameter, average inner diameter, wall thickness, joint length, and average inner diameter of the socket and socket wall thickness of the pipes according to GB/T 8806-2008. 5.3 **Tensile Strength**: Follow the requirements specified in GB/T 1040.2-2006. 5.4 **Bending Modulus**: Follow the requirements specified in GB/T 9341-2008. 5.5 **Melt Flow Rate**: Follow the requirements specified in GB/T 3682.1-2018. 5.6 **Ring Stiffness**: Follow the requirements specified in GB/T 9647-2015. 5.7 **Drop Hammer Impact Test**: Follow the requirements specified in GB/T 14152-2001. 5.8 **Ring Flexibility**: Follow the requirements specified in GB/T 39385-2020. 5.9 **Oven Test**: Follow the requirements specified in GB/T 19472.1-2019. 5.10 **Creep Ratio**: Follow the requirements specified in GB/T 18042-2000. 5.11 **Oxidation Induction Time**: