The vacuum performance of the interlayer generally meets the requirements for a 5-year vacuum service life.
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GB/T18442.3-2019, clause 15.4 states that \"the vacuum performance of the interlayer generally meets the requirements for a 5-year vacuum service life.\" I would like to ask what is meant by a 5-year vacuum service life. For example, what maximum vacuum level in pascals over 5 years will not affect performance? I seek guidance from experts.
Vacuum insulation panels are generally used for thermal insulation. During use, if a temperature imbalance occurs, it indicates that the vacuum level has decreased. At this point, it is necessary to check the cause; after addressing it, vacuum pumping should be carried out again, and once the standards are met, normal use can proceed. As for the duration, it’s best to consider the actual usage effect. The five-year period is likely a requirement for the equipment and should fall under the scope of the warranty; for reference only.
This really doesn’t make much sense; it’s just something said casually. If the vacuum level isn’t high enough, it’s usually sufficient to contact the manufacturer and have them evacuate the space again. Just make sure the vacuum level doesn’t rise too quickly; regular pumping will meet the requirements. Furthermore, although the tanks are equipped with interfaces for measuring vacuum levels, manufacturers generally do not have the equipment needed to conduct such measurements; therefore, asking for a specific value is meaningless. No one has gone to measure it. Generally, it is determined by observation; the tank body often \"sweats\" as the pressure inside rises too quickly, and the safety valve activates frequently, which indicates that the vacuum level is insufficient.
When materials are available, a pressure below 10 Pa is normal; take more measurements.