Common test methods for insulating and sheathing materials of electric and optical cables - Part 31: Methods specific to PVC compounds - Pressure test at high temperature - Test for
1 General
1.1 Scope
GB/T 2951 specifies the test methods to be used for testing polymeric insulating and sheathing materials of electric and optical cables for power distribution and telecommunications, including cables used in ships and in offshore applications.
This part of GB/T 2951 gives the methods for pressure test at high temperature and for tests for resistance to cracking, which apply to PVC insulating and sheathing materials of wires, electric and optical cables.
1.2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 2951, constitute provisions of this part. For dated references, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents 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 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)
2 Test principle
Full test conditions (such as temperatures, durations, etc.) and full test requirements are not specified in this part; it is intended that they shall be specified by the standard dealing with the relevant type of cable.
Foreword I
1 General
2 Test principle
3 Applicability
4 Type tests and other tests
5 Pre-conditioning
6 Test temperature
7 Median value
8 Pressure test at high temperature for insulations and sheaths
9 Tests for resistance of insulations and sheaths to cracking
