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Suitability Test


Suitability test of Shrinkin'Sleeves for

    a) Continuous operating temperature.
    b) Long duration testing at high temperature


Sample Description:-
    a)Cut lengths of Shrinkin'Sleeves to be tested.
    b)Sleeves under test, shrunk on appropriate mandrel.


Procedure:-
Cut lengths of sleeves/sleeved mandrels progressively exposed to various temperatures, durations in the oven. The results observations are tabulated after removal of test samples from oven.

Test Specified :
Expose test samples to following parameters.

a)Continuous operation

Temperature:-
100oC x 1000 hrs. Long duration testing at higher temperature : 110oC x 24 hrs.

Observations
a) The shrinkage should be even from all sides.
b) The surface, smooth all over without pit marks / pin holes
c) The sleeving should not develop any crack.
d) The sleeving retains all its properties after cooling.

Inference:-
  • Shrinkin'Sleeves can be used at an elevated temperature of 100oC for 1000 hours.
  • Shrinkin'Sleeves have got a capacity to bear a heat shock Upton 110oC for 24 hours.

Sample Description : Cut lengths of "Shrinkin'Sleeves".

Apparatus
1. Ignition chamber : Corning / Pyrex glass, dia. 75 mm x 450 length.
2. Ignition source : Bunsen burner, placed in a fume cupboard.

Procedure :
a) Clamp an appropriate size & length of "Shrinkin'Sleeves" in a holder & fix it into the ignition chamber.
b) Light the ignition source under normal Oxygen conditions.
c) Bring the test sample in the ignition zone.

Observations :
a) After shrinkage test sample gets ignited in the ignition zone.
b) There is no droppage of any melt during ignition.
c) Test sample withdrawn out of ignition zone or the ignition source put off, the ignition of test sample ceases immediately.
d) The ignited material leaves granular ash.

Inference :
"Shrinkin'Sleeves" are self extinguishing with no droppage of any melt during ignition.