The new heat aging test chamber standard, GB/T 7141-2008, references several normative documents that define the testing procedures and conditions for evaluating the thermal stability of materials. These referenced documents become part of this standard by reference. For documents with a specified date, any subsequent amendments or revisions (excluding errata) do not apply to this standard. However, it is recommended that parties involved in agreements based on this standard review whether newer versions of these documents are available and suitable for use. For undated references, the latest edition of the document applies.
Some of the key normative references include:
- **GB/T 2035: Plastic Terminology and Definitions** (GB/T 2035-2008, equivalent to ISO 472:1999)
- **GB/T 2918: Conditioning and Testing of Plastic Specimens** (GB/T 2918-1998, equivalent to ISO 291:1997)
- **GB/T 7142: Determination of Time-Temperature Limit After Long-Term Thermal Exposure of Plastics** (GB/T 7142-2002, modified from ISO 2578:1993)
- **GB/T 11026.4-1999: Guide for Determining the Heat Resistance of Electrical Insulating Materials – Part 4: Aging Oven – Single Chamber Oven** (equivalent to IEC 60216-4-1:1990)
- **ISO 16014-2: Plastics – Determination of Average Molecular Weight and Distribution – Part 2**
- **ASTM D3826:1998 (2002): Determination of the Final Aging Point of Degradation of Polyethylene and Polypropylene by Tensile Test**
These standards provide essential guidelines for conducting accurate and consistent heat aging tests using the new GBT7141-2008 compliant test chamber. The use of these references ensures that testing procedures are standardized and reliable across different laboratories and industries.
This standard is particularly important for manufacturers and researchers working with plastics and electrical insulation materials, as it helps evaluate material performance under long-term thermal exposure. By following GB/T 7141-2008, users can ensure their products meet required quality and safety standards.
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