Kingflex NBR Elastomeric Insulation Rubber Foam Tube adopts high-performance NBR/PVC as the main raw material with various quality supplementary material by special frothing process to produce the soft energy conversation foam insulation. It has closed cell construction and has many great features such as soft resistance refractive index, cold resistance, fire-retardant, waterproof, low thermal conductivity , shock and sound absorption and so on. It can be widely used in large-scale central and home air conditioning,construction, chemicals, textile and electrical industries.
Nominal wall thicknesses of 1/4”, 3/8″, 1/2″, 3/4″,1″, 1-1/4”, 1-1/2″ and 2” (6, 9, 13, 19, 25 , 32, 40 and 50mm).
Standard Length with 6ft (1.83m) or 6.2ft(2m).
NBR Elastomeric Insulation Rubber Foam Tube is generally black in color, other colors are available upon request. The extruded flexible tubes are specially designed to fit the standard diameters of copper, steel and PVC piping.
Technical Data Sheet
Property
Unit
Value
Test Method
Temperature range
°C
-50 to 110
GB/T 17794-1999
Density range
Kg/m³
45-65 Kg/m³
ASTM D1667
Water vapor permeability
Kg/(m.s.pa)
≤0.91×10⁻¹³
DIN 52 615 / BS 4370 Part 2 1973
Water vapor diffusion resistance (μ)
-
≥10000
-
Thermal Conductivity
W/(m.k)
≤0.030 (-20°C)
ASTM C 518
≤0.032 (0°C)
≤0.036 (40°C)
Fire Rating
-
Class 0 & Class 1
BS 476 Part 6 & 7
Flame Spread and Smoke Developed Index
-
25/50
ASTM E 84
Oxygen Index
-
≥36
GB/T 2406, ISO4589
Water Absorption, % by Volume
%
20%
ASTM C 209
Dimension Stability
-
≤5
ASTM C534
Fungi resistance
-
Good
ASTM 21
Ozone resistance
-
Good
GB/T 7762-1987
Resistance to U.V. and weather
-
Good
ASTM G23
Frequently Asked Questions (FAQ)
What are the main advantages of NBR Elastomeric Insulation Rubber Foam?
It features a low density, even closed bubble structure, which offers low thermal conductivity, excellent cold resistance, low water absorption, sound absorption, and superb flexibility for easy installation.
What is the operating temperature range for this NBR foam insulation?
The NBR elastomeric insulation is designed to operate effectively within a temperature range of -50°C to 110°C, verified by GB/T 17794-1999 test methods.
Does this insulation material have fire safety certifications?
Yes, it achieves Class 0 and Class 1 fire ratings according to BS 476 Part 6 and Part 7 standards. It also features a flame spread and smoke developed index of 25/50 under ASTM E 84, and an oxygen index of ≥36.
Is the NBR insulation tube suitable for outdoor applications?
Yes. The technical parameters demonstrate good resistance to ozone (GB/T 7762-1987), fungi (ASTM 21), and U.V./weathering (ASTM G23), making it highly durable against environmental exposure.
What piping types can the elastomeric foam tubes fit?
These extruded flexible tubes are specially sized to fit standard industrial diameters of copper, steel, and PVC piping, ensuring tight and efficient heat insulation.
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