Two national standards for vacuum insulation panels approved
The State Administration for Market Regulation has approved the release of two national standards for vacuum insulation panels, which will be implemented on November 1, 2021
According to the China Building Materials Journal, recently, two national standards for vacuum insulation panels, GB/T 39548-2020 "Determination of thermal resistance retention rate under wet and hot conditions for vacuum insulation panels" and GB/T 39704-2020 "Determination of effective thermal conductivity coefficient for vacuum insulation panels", led by Nanjing Fiberglass Research and Design Institute, have been approved and published by the State Administration for Market Regulation. These two standards will be implemented on November 1, 2021.
Vacuum insulated panel (VIP) is a super insulation material with environmentally friendly and efficient energy-saving characteristics, and has a wide range of applications in industries such as refrigerators, cold chains, and construction. However, due to its unique structure, it is likely to fail during use, resulting in a decrease in insulation performance.
At present, there are various types of VIP product manufacturing processes in the market, with uneven quality, and difficulties in vacuum degree failure, reliability evaluation, and other aspects; Domestic manufacturers and user units lack testing methods for the effective thermal conductivity of VIP, and their evaluation methods and judgment indicators for durability are also different, resulting in difficulties in product acceptance and promotion.
GB/T 39704-2020 "Determination of Effective Thermal Conductivity of Vacuum Insulation Panels" is applicable to the determination of VIP effective thermal conductivity. This standard provides three methods for measuring VIP effective thermal conductivity, promoting production enterprises to improve processes and guiding users in product selection. GB/T 39548-2020 "Determination of thermal resistance retention rate of vacuum insulated panels under humid and hot conditions" is applicable to the evaluation of long-term durability of VIP under different working conditions. This standard provides four accelerated aging treatment conditions and evaluation methods to quickly evaluate the reliability of VIP in different usage environments.
The release of these two standards will fill the gap in the effective thermal conductivity and durability evaluation methods of VIP in China, which is conducive to unified quality control of products by various production enterprises, enabling users to have a more intuitive understanding of product performance, and playing an important role in promoting VIP development and industry development.