GB/T 29035-2022 specifies the test methods for key properties of flexible graphite packing rings, including density, friction coefficient, compressibility, resilience, thermal weight loss, and sulfur content. It clarifies the requirements for samples, test procedures, and rules for result calculation, and is applicable to the performance evaluation and quality inspection of such products. The tests require the use of various specialized instruments, including a precision balance and vernier caliper for density determination, a friction and wear testing machine for measuring the friction coefficient, a material testing machine and dial indicator for testing compression and resilience properties, an electric thermostatic drying oven for measuring thermal weight loss, and sulfur content determination equipment. This standard provides a unified and accurate technical basis for product development and production quality control.
| Status | Active | ||
|---|---|---|---|
| CCS | J22 | ICS | 21.140 |
| Release Date | 2022-12-30 00:00:00 | Implementation Date | 2023-07-01 00:00:00 |
