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Preparation of Test Specimens
Unless otherwise specified, tests shall be carried out on specimens of sleeving recovered by
conditioning in a fan assisted air circulating oven at 200 ± 5°C for 4 ± 1 minutes and allowed to
cool in air to ambient temperature. No pre-conditioning period is required prior to testing.
Unless otherwise specified, all tests shall be made under standard ambient conditions according
to IEC Publication 60212. In cases of dispute the tests shall be carried out at a temperature of
23 ± 2°C and at 50 ± 5% relative humidity.
Dimensions and Longitudinal Change
The test method shall be as specified in ASTM D2671.
The length and inside diameter of three 150mm long specimens of expanded sleeving shall be
measured. The specimens shall be recovered in a fan assisted air circulating oven and the length
and inside diameter of each shall be measured. The longitudinal change shall be expressed as a
percentage of the original length. The minimum and maximum recovered wall thickness shall
be determined.
Tensile Strength and Ultimate Elongation
The test method shall be as specified in ISO 37.
For sleeving of recovered bore greater than 6mm, five Type 2 dumb-bell specimens shall be
tested. For sleeving of recovered bore less than or equal to 6mm, five tubular specimens 125mm
long shall be tested. Initial jaw separation shall be 50 mm and rate of jaw separation shall be
100 ± 10mm per minute.
The test shall be carried out at a temperature of 23 ± 2°C.
Secant Modulus at 2% Strain
The test method shall be as specified in Method A of ASTM D882.
For sleeving of recovered bore greater than 6mm, five strip specimens 150mm long shall be
tested. For sleeving of recovered bore less than or equal to 6mm five tubular specimens 150mm
long shall be tested. Initial jaw separation shall be 100mm and rate of jaw separation 10 ± 1mm
per minute. The test shall be carried out at a temperature of 23 ± 2°C.
The test method shall be as specified in Method A of ISO 1183.
The test method shall be as specified in ASTM D2671.
For sleeving of recovered bore 6mm or less, apply the test to cut lengths of that sleeving. For
sleeving of recovered bore greater than 6mm, apply the test to strips 6mm wide, cut from the
recovered sleeving, with their lengths parallel to the extruded axis. Mandrel diameter shall be
10x specimen thickness ± 10%. For tubular specimens the thickness is the outside diameter.
The specimens shall be conditioned as specified in Table 1.
