heat-shrinkable
wraparound sleeve
heat-shrinkable wraparound sleeve
1. Product profile
The heat-shrinkable wraparound sleeve its inner layer painting in the steel pipe surface is the epoxy primer, Intermediate level is special hot melt rubber, Outer layer is modified radiation crossing linking polyethylene parent metal
2. Function characteristic
The heat-shrinkable wraparound sleeve has the independent stop plate package sheathing which designs for the steel pipe anticorrosion. when the operation, the meets place does not slide, this product is characterized by the higher mechanical strength, long aging resistance time, Chemical Medium corrosion Resistance, being strong to glue the relay and easy to operate.
3. Apply range
It is suitable for each kind of model anticorrosion pipeline, Antiabrasion layer of insulating pipeline and mending the mouth outside wounded
4. Sleeve Thickness (mm)：
Apply caliber
Base material
adhesive layer

≤ 400
≥ 1.2
≥ 0.8

＞ 400
≥ 1.5


5. Sleeve function：
NO.
Test item
Requirement
Test method
Name

1
Tensile Strength (MPa)
≥17
GB/T 1040




Base material function

2
Elongation to break(％)
≥400
GB/T 1040

3
Vicat Softening Point (℃)
≥90
GB/T 1633

4
Brittle temperature (℃)
≤-65
GB/T 5470

5
Dielectric breakdown voltage(MV/m)
≥25
GB/T 1408.1

6
Volume resistivity (Ω.m)
≥1×10
GB/T 1410

7
Soil stress creep resistance(F50)(h)
≥1000
GB/T 1842

8
Chemical Medium corrosion Resistance (soaking for 7d) ％
10％ HCL ≥85
GB/T 1040

10％ NaOH ≥85
10％ NaCL ≥85
9
Heat Aging (150℃,168h)
Tensile
strength (MPa) ≥14 GB/T 1040
Elongation
to break (％) ≥300
10
Ring &ball softening point ℃
≥90
GB/T 1633-79


sleeve

11
Lap shear strength (MPa)
≥1.0
GB/T 2792-81

12
Brittle temperature (℃)
≤-15
GB/T 5470-85

13
Peel Strength (N/cm)
Sleeve/PE ≥70
GB/T 2792

Sleeve/FBE ≥70
Sleeve/Primer steel ≥70



6. primer function

NO
Test item
Requirement
Test method
Name

1
solidified shear strength (MPa)
≥ 5.0
SY/T 0041-1999
Araldite priming paint function

2
Negative peel（65℃, 48）（mm）
≤ 10
SY/T 0041-2002