| NO. |
|
Items |
|
Performance
requirements |
| 1 |
Voluntary
standards |
GB/T14823.2-93 |
| 2 |
Appearance |
Both
the inside and outside surfaces of the pipes should
be smooth,without blowholes,overt openings or
unidenticl color.The mouth of pipes should have
smooth edges so as not to scratch the insulating
layer of cables.The color is white. |
| 3 |
Wall
thickness uniformity(mm) |
|＠A|＋0.1+0.1A |
| 4 |
Outer
diameter |
On
gauge |
| 5 |
Minimum
outer diameter |
Gauge
deadweight impassability |
| 6 |
Minimum
inner diameter |
Gauge
deadweight passableness |
| 7 |
Compression
resistance (change in outer diameter) |
＋25
When load 1min |
| 8 |
Compression
resistance (change in outer diameter) |
＋10 When unload 1min |
| 9 |
Bending
strength (room temperature,low temperature) |
Without
visible fissure |
| 10 |
Resistance
to shock |
Of
12 pipes,at least 9 have no visible fissure or
breakage phenomena |
| 11 |
Bending
resistance |
Without
visible fissure,but gauge deadweight passed |
| 12 |
Heat
resistance(impression diameter) |
＋2 |
| 13 |
Electrical
strength |
No
breakdown or flashover phenomena within 15 mins |
| 14 |
Insulation
resistance |
−100 |
| 15 |
Firing
resistance(flame and ignition self-extinguishing
time) |
＋30 |
| 16 |
Horizontal
firing |
Up
to FV-I grade |
| 17 |
Vertical
firing |
Up
to FV-0 grade |
|
18 |
Oxygen index |
−40 |
19 |
Smoke density
range |
＋75 |
|
20 |
Length |
The company produces electrician
adapter pipes whose length is 3.03 meters(<D32)
and 3 meters (>D32).Delivery can be also made
on clients'request. |
