Heat Shrinkable Semi-Conductive Tubings

All dimensions are in mmDrawing depicts typical dimensionsE – as suppliedS – after free recoveryD – internal diameter without adhesive coatingL – Length as per requirement

Heat Shrinkable Semi-conductive Tubings are used in High Voltage Plastic and Paper insulated cable Joints up to 36kV to provide insulation screen on the build-up insulation over connectors. The Semi-conductive Tubings are made from thermally stabilised cross linked semi-conductive polymeric material.

CODESIZEDia DT
ESS
MinMax±20%
RCBT40/1540152.0
RCBT50/1750172.5
RCBT80/2480242.5
RCBT90/3490343.2
CharacteristicsValueTest Method
Physical Properties
Specific gravity1.19±0.2ASTM D-1505
Water adsorption1% (max)ASTM D-570 /ISO 62
Tensile strength12 N/sqmm (min)ASTM D-412 /ISO 37
Ultimate elongation300% (min)ASTM D-412 /ISO 37
Hardness45±3 shore DASTM D-2240
Thermal Ageing Tests (120°C for 500hrs)
Tensile strength10 N/sqmm (min)ASTM D-412 /ISO 37
Ultimate elongation250% (min)ASTM D-412 /ISO 37
Electrical Properties
Volume resistivity1x107 Ohm-cm (min)ASTM D-257 /IEC 93
Chemical Properties
Fungus resistance<1ASTM G-21
Salt spray testNo pitting / No corrosionASTM B-117
Chemical resistance immersion in following liquids NaOH(40%), H2So4(3%), Toluene,Acetone for 24 hrs at room temp.Good (No visual defects)ISO 175