GB/T 42413-2023
Test method for resistance to freezing of glassware and glass containers (English Version)
- Standard No.
- GB/T 42413-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 42413-2023
- Scope
- This document describes the test method for the freezing resistance of glass containers. This document is applicable to the freezing resistance test of glass containers in the field of glass instruments.
- Introduction
Interpretation of GB/T 42413-2023, National Standard of the People's Republic of China
Analysis of Standard Background and Technology Evolution
GB/T 42413-2023 "Test Method for Freezing Resistance of Glass Instruments and Glass Containers" is an important standard issued by the State Administration for Market Regulation and the National Administration of Standardization, which aims to evaluate the performance of glass containers in low-temperature environments. The background of the formulation of this standard is mainly based on the growing demand for high-quality glass products in modern medical, laboratory and industrial fields.
With the advancement of science and technology, low-temperature storage technology is widely used in the pharmaceutical, food and other industries. As a key storage medium, the freezing resistance of glass containers has become an important indicator. This standard fills the gap in this field in China and ensures product quality and safety performance.
Core principles and test methods of the standard
1. Temperature control requirements
water bath or water bath The temperature uniformity should not exceed ±1℃, and the fluctuation range should be within ±1℃. Low temperature test equipment needs to achieve higher accuracy, with a uniformity of ±2℃ and a fluctuation range of ±2℃.
These requirements ensure the stability of the test environment and avoid test errors caused by improper temperature control.
2. Sample preparation and processing
The standard clearly states that there should be no obvious glass defects and dirt on the sample surface. Before the test, the sample needs to be left to stand for more than 30 minutes to ensure dryness.
The selection of the sample box is also critical. The material must have good thermal conductivity and be made of stainless steel with a thickness between 0.5mm and 1.0mm. The bottom hole diameter is designed to be 0.2mm to 1.0mm to ensure uniform heat dissipation.
3. Gradual Freezing Method and Direct Freezing Method
Test Method Temperature Control Holding Time Operation Steps Gradual Freezing Method -20℃±2℃ → Test Temperature Hold for 2 hours and then continue to 24 hours Lower the temperature in stages and gradually test the tolerance of the sample Direct Freezing Method Directly lower to the test temperature Hold for 24 hours Quickly evaluate the performance of the sample under extreme low temperatures The two methods have their own emphasis. The gradual change method is suitable for simulating the temperature change process in actual use scenarios, while the direct method focuses more on the ultimate bearing capacity of the test sample.
Suggestions and precautions for standard implementation
1. Experimental equipment selection
Select a water bath and low-temperature test equipment that meet the requirements to ensure that their temperature accuracy and fluctuation range meet the standard requirements. The equipment calibration frequency should be at least once a year to maintain measurement accuracy.
2. Sample preparation specifications
Prepare strictly in accordance with the design requirements of the sample box to avoid collision or uneven temperature control caused by improper sample placement. Wear gloves during operation to prevent direct contact that may affect the test results.
3. Data recording and analysis
Record the test conditions and results of each batch in detail, including temperature changes, holding time and sample damage. Identify potential quality problems through data analysis and optimize production processes.
GB/T 42413-2023 Referenced Document
- GB/T 35599 Laboratory glass and glassware outward defect terms
- GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 42413-2023 history
- 2023 GB/T 42413-2023 Test method for resistance to freezing of glassware and glass containers