GB/T 18826-2016 in English
VALID1,1,1,2-Tetrafluoroethane(HFC-134a)for industrial use
- Issued on:2016-10-13
- Implemented on:2017-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 18826-2016工业用1,1,1,2-四氟乙烷（HFC-134a）》由TC63（全国化学标准化技术委员会）归口，TC63SC9（全国化学标准化技术委员会制冷剂分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
GB/T 18826-2016 Standard Overview
GB/T 18826-2016 "1,1,1,2-Tetrafluoroethane (HFC-134a) for Industrial Use" standard specifies the technical requirements, test methods, inspection rules and safety precautions of this product. Compared with the old version of the standard, the main revisions include the optimization of technical indicators and the addition of halogenated unsaturated hydrocarbons and other items.
Comparison of technical indicators
| Project | Superior product (2016 edition) | Qualified product (2016 edition) | Comparison with the old version |
|---|---|---|---|
| HFC-134aContent/% | ≥99.90 | ≥99.50 | Optimized from 99.9% to 99.90% |
| Moisture/% | ≤0.001 | ≤0.005 | Optimized from 0.005 to 0.001 |
| Halogenated unsaturated hydrocarbons/% | ≤0.0040 | - | New items |
Test method analysis
HFC-134a content determination adopts gas chromatography, and the relative mass correction factor of each component is calculated by the correction area normalization method. It is recommended to use a fused silica capillary column (60m×0.32mm) as the chromatographic column, with an initial temperature of 80℃, a program temperature increase to 140℃, and maintain for 3 minutes.
Water content determination refers to GB/T7376-2008 standard method, and chloride and non-condensable gas determination adopt turbidity method and gas chromatography respectively.
Implementation recommendations
- Production units should strictly follow the standard requirements for quality control and calibrate instruments and equipment regularly.
- It is recommended that enterprises establish a complete HFC-134a product traceability system to ensure that product quality can be traced.
- In terms of inspection rules, it is recommended to give priority to type inspection and make a comprehensive judgment based on the factory inspection results.
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