Common test methods for insulating and sheathing materials of electric and optical cables - Part 42: Methods specific to polyethylene and polypropylene compounds - Tensile strength a
1 General
1.1 Scope
This part of GB/T 2951 specifies the test methods to be used for testing polymeric insulating and sheathing materials of electric and optical fibre cables for power distribution and telecommunications, including cables used on ships and in offshore applications. These test methods apply specifically to polyolefin insulation and sheath.
1.2 Normative References
The following normative document contains provisions which, through reference in this text, constitute provisions of this part of GB/T 2951. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2951.11-2008 Common Test Methods for Insulating and Sheathing Materials of Electric Cables and Optical Cables — Part 11: Methods for General Application — Measurement of Thickness and Overall Dimensions — Tests for Determining the Mechanical Properties (IEC 60811-1-1:1993, IDT)
GB/T 2951.13-2008 Common Test Methods for Insulating and Sheathing Materials of Electric Cables and Optical Cables — Part 13: Measurement for Determining the Density — Water Absorption Tests — Shrinkage Test (IEC 60811-1-3:1993, IDT)
ISO 188 Rubber, Vulcanized or Thermoplastic — Accelerated Ageing and Heat-resistance Tests
Foreword II
1 General
1.1 Scope
1.2 Normative References
2 Terms and Definitions
3 Test Values
4 Applicability
5 Type Tests and Other Tests
6 Pre-conditioning
7 Median Value
8 Tensile Strength and Elongation at Break After Conditioning at Elevated Temperature
8.1 General
8.2 Conditioning Procedure
8.3 Tensile Strength and Elongation Tests After Conditioning at Elevated Temperature
8.4 Expression of Results
9 Wrapping Test After Conditioning at Elevated Temperature
9.1 General
9.2 Conditioning Procedure
9.3 Test Procedure
9.4 Evaluation of Results
10 Wrapping Test After Thermal Ageing in Air
10.1 General
10.2 Apparatus
10.3 Sampling
10.4 Ageing Procedure
10.5 Test Procedure
10.6 Evaluation of Results
11 Mass Increase of Insulation
11.1 General
11.2 Sampling
11.3 Test Procedure
11.4 Calculation
Annex A (Normative) Long-term Stability Test
Annex B (Normative) Test Method for Copper-catalyzed Oxidative Degradation of Polyolefin Insulated Conductors [Oxidation Induction Time (OIT) Test]
