YS/T 451-2012 in English
VALIDCopper Tubes with Plastic-lag
- Issued on:2012-11-07
- Implemented on:2013-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
| Standard No: | YS/T 451-2012 |
| Document status: | VALID |
| Title in English: | Copper Tubes with Plastic-lag |
| Title in Chinese: | 塑覆铜管 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2012-11-07 |
| Implemented on: | 2013-03-01 |
| Superseding: |
YS/T 451-2002 Poly-lag copper tube
|
| ICS Classification: | 77.150.30-Copper products |
| Chinese Classification: | H62-Heavy metals and their alloys |
| Professional Classification: | YS-Non-ferrous Metal |
| Related Keywords: | copper tubes
plastic-coated copper tubes plastic-lag introduction standard revision background plastic-coated copper hot water pipe adopts |
| Related Topics: | copper pipe
ys/t836-2012 ys/t 745.9-2012 Copper Standard ys/t+3017-2012 ys/t798-2012 Copper clad steel material Aluminum clad copper clad steel ys/t 789 2012 ys/t817-2012 ys/t789-2012 ys/t858-2012 |
本标准规定了塑覆铜管产品的术语和定义、要求、试验方法、检验规则以及包装、标识、运输、贮存、质量证明书及合同（或订货单）等内容。
本标准适用于输送冷水、热水、天然气、液化石油气、煤气和氧气等塑覆铜管。
Introduction
Standard Revision Background and Technology Evolution
YS/T 451-2012 is a replacement version of YS/T 451-2002, and is revised mainly with reference to the international standard EN 13349:2002. This revision focuses on improving the performance requirements of plastic-coated copper tubes in terms of aging resistance and dimensional accuracy, and adds key technical indicators such as plastic coating elongation ≥ 50% and aging rate Ai/Ac ≥ 0.5.
Analysis of core technical requirements
| Project | 2002 Edition | 2012 Edition | Technical improvement points |
|---|---|---|---|
| Plastic coating thickness deviation | Ungraded | Grading control according to pipe diameter | Accuracy improved by 30% |
| Aging performance | Not specified | 110℃/168h aging test | New key indicators |
| Bending | Not required | ≤5mm/m | New geometric tolerances |
Product classification and typical applications
1. Plastic-coated copper cold water pipe
Adopts a flat ring structure (thickness 1.0-2.0mm), suitable for building water supply systems. A typical case is a pure water pipeline project in a hospital in Beijing, which has been used continuously for 5 years without cracking of the coating.
2. Plastic-coated copper hot water pipe
Adopts a toothed ring structure (thickness 1.6-3.0mm), and the actual temperature resistance of the hot water system of a hotel in Shanghai is 95℃, and the Vicat softening temperature is ≥80℃.
Key points of key testing methods
Elongation test: Use 5B specimen according to GB/T 1040.2, 50mm/min tensile speed, and take the average of 5 groups of data.
Aging test: Test the conditional elongation after 168 hours of treatment in a 110℃ liquid environment, and calculate the aging retention rate.
Implementation suggestions
- For gas pipelines, flame-retardant products with an oxygen index of ≥30 should be used preferentially
- For hot water systems, it is recommended to use a toothed ring structure to enhance creep resistance
- During acceptance, the uniformity of the plastic coating thickness should be checked (allowable deviation ±0.1-0.5mm)
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