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Low smoke heat-shrinkable rubber tubing

ST-DGE series

The ST-DGE series conform to the EN-45545-2 (R22/R23) fire protection standards of railway vehicles.

Sheathing example
Sheathing example

Features

Applications

General Properties

Parameter Product name ST-DGE

Features

 Flame retardant and low smoke

Density

 1.34

Hardness  Durometer A

 75

Tensile strength

MPa		 6.2

Elongation at break

%		 230

Tear strength

kN/m		 13

Dielectric breakdown strength

kV/mm		 27

Volume resistivity

T·Ωm		 92

Flame-resistant  Sheet  UL-94  t=1mm

 V-0 equivalent

Temperature range

°C		 -40 to +200

Shrinkage in direction of diameter

%		 Approx.50

Shrinkage temperature

°C		 80 <
(Not specified values)

Test Result EN45545-2 (Test laboratory Crepim in France）

Requirement Parameter Test method HL3 required value Thickness
2 mm 3 mm

R22
(Internal)

 Fuming characteristic
(Optical density)		 Ds max-dimensionless
Smoke density
(Max in 10 min)		 ≤ 150 66 76
Smoke toxicity CIT-dimensionless
Toxicity (8 gases)		 ≤ 0.75 0.08 0.07
Oxygen index Limited oxygen index
(LOI) %O2		 ≥ 32 39.0 44.0

R23
(External)

 Fuming characteristic
(Optical density)		 Ds max-dimensionless
Smoke density
(Max in 10 min)		 ≤ 300 66 76
Smoke toxicity CIT-dimensionless
Toxicity (8 gases)		 ≤ 1.5 0.08 0.07
Oxygen index Limited oxygen index
(LOI) %O2		 ≥ 32 39.0 44.0
(Not specified values)
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