GB/T 18993.2-2020 in English
VALIDChlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 2: Pipes
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$291.00
《GB/T 18993.2-2020冷热水用氯化聚氯乙烯（PVC-C）管道系统 第2部分：管材》由TC48（全国塑料制品标准化技术委员会）归口，TC48SC3（全国塑料制品标准化技术委员会塑料管材、管件及阀门分会）执行，主管部门为中国轻工业联合会。
Introduction
Analysis of the core content of the standard
GB/T18993.2-2020, as the second part of the series of standards for chlorinated polyvinyl chloride piping systems, focuses on standardizing the production technical requirements for PVC-C pipes. Compared with the 2003 version, the main technical changes are reflected in:
| Technical dimensions | 2003 version | 2020 version | Improvement points |
|---|---|---|---|
| Dimension control | Including DN20/DN25 with * wall thickness | Cancellation of special wall thickness requirements | Uniform wall thickness standards |
| Mechanical properties | Undefined curvature | New ≤1% curvature requirement | Improve installation reliability |
| Inspection rules | AQL6.5 | AQL4.0 | Tighten quality control |
| System suitability | Includes specific test content | References to GB/T18993.5 | Standard system optimization |
Detailed explanation of key performance indicators
Material requirements
Pipe raw materials must comply with GB/T18993.1-2020, and it is allowed to add ≤5% recycled materials from the same factory. New Solvent-based adhesive usage specifications are added, requiring that it has no negative impact on pipeline performance.
Typical application scenarios
In a hotel hot water system renovation project, S5 dn32×en2.9 pipes were selected and operated continuously for 3 years without leakage under 80℃/0.6MPa conditions, verifying the reliability of the 95℃/165h hydrostatic test in the standard.
Technology Evolution Analysis
When this standard was revised and adopted from ISO15877-2:2009, three important adjustments were made according to the characteristics of China's building environment:
- Delete the PVC-CⅡ material requirements in the ISO standard to adapt to the current situation of a single material system in China
- Add dimensional indicators such as curvature and out-of-roundness to enhance construction adaptability
- Introduce the sanitary requirements of GB/T17219 to ensure the safety of drinking water
Implementation Suggestions
1. Selection Notes: Select the corresponding pipe series (S4-S6.3) according to the design pressure (0.4-1.0MPa) and the use temperature
2. Acceptance Points: Focus on testing the 95℃/165h hydrostatic test and the ≤0.2% light transmittance index
3. Construction Specifications: Stacking height ≤1.5m during storage, avoid direct sunlight
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