GB/T 29035-2012 in English

《GB/T 29035-2012柔性石墨填料环试验方法》由TC350（全国填料与静密封标准化技术委员会）归口，主管部门为中国机械工业联合会。

1 Scope

This standard specifies test equipment, sample requirements, test procedures and calculation of test results for density, friction coefficient, compression and resilience rates, and thermal weight loss of flexible graphite ring.

This standard is applicable to test for physical-mechanical performance of flexible graphite ring.

2 Test of Density

2.1 Apparatus

2.1.1 Balance, with a sensitivity of 0.001g.

2.1.2 Vernier caliper, to the accuracy of 0.02mm.

2.2 Samples

There shall be at least 5 samples with rectangular sections in each group.

2.3 Test environment

The ambient temperature is (23±5)℃.

2.4 Test procedures

2.4.1 Inside and outside diameters of the sample is measured with a vernier caliper at three points with equal radian, and the arithmetic mean, to the nearest 0.1mm, is taken.

2.4.2 Height of the sample is measured with a vernier caliper at three points with equal distance, and the arithmetic mean, to the nearest 0.1mm, is taken.

2.4.3 The mass of sample, to the nearest 0.01g, is weighed.

Foreword i
1 Scope
2 Test of Density
3 Test of Friction Coefficient
4 Test of Compression and Resilience Rates
5 Test of Thermal Weight Loss
6 Test Report