Bore Diameter

Wall thickness(mm)

Nominal（mm）

Tolerance（±）

Minimum

Maximum

0.3、0.5、0.8

±0.10

0.20

0.50

1.0、1.5

±0.15

0.20

0.75

2.0、2.5

±0.20

0.20

0.75

3.0、3.5、4.0、5.0、6.0

±0.25

0.20

0.75

7.0、8.0、9.0、10.0、12.0、14.0、16.0、18.0

±0.50

0.40

0.90

20.0、23.0、25.0、27.0

±0.50

0.40

0.10

Property

Requirements

Breakdo wn Voltage（KV）

under normal

2.5

after dampening

1.2

after winding

1.5

Elasticity

Temp:20±5degree，humidity:65±5%，the sleeving has been wound around the specified mandrel for 1 hour

The coating should not crack or appear detached

The sleeving has been treated for 2hours at a temperature of 10 to 15 degree below zero.then has been around the specified mandrel immediately.

The coating should not crack or appear detached

The sleeving has been treated at a temperature of 130±2degree for 24hours and is wound around a specific mandrel at the room temperature of 20±2 degree

The coating should not crack or appear detached

Oil resistance

The sleeving has been dipped in transformer oil for 24hours at a temperature of 105±2degree

The coating should not crack or appear detached.But the colour of the sleeving is allowed to grow darker.

Benzene resistance

The sleeving has been kept in methylbenzene at a normal atmospheric temperature for 4hours

The coating should not be sticky or show delamination