Product_Header_1920x384_ArmaFlex

AP/ArmaFlex + AP/ArmaFlex FS

The original flexible elastomeric pipe insulation for reliable protection against condensation and energy loss.

Technical information AP/ArmaFlex + AP/ArmaFlex FS
PropertyValue / AssessmentStandard / Test method
Temperature range
Service temperature1,2,3,4
RangeMin. °CMin. °FMax. °CMax. °F
3/8" through 1" Walls (NBR/PVC-based)-183-297105220
1-1/2" and 2" walls (NBR/PVC based)-183-297105220
1-1/2" and 2" Walls (EPDM-based)-183-297149300
Remarks82 °C (180 °F) — Full bonding sheet insulation
ASTM C534
Thermal conductivity
Declared thermal conductivity
Θm50 ° F (10 ° C)75 ° F (24 ° C)100 ° F (38 ° C)125 ° F (52 ° C)
λd ≤ [W/(m·K)] 0.0340.03530.0370.039
k ≤ [Btu-in/(h-ft²-°F)]0.2350.2450.2570.268
Range3/8" through 2" walls (NBR/PVC products)
ASTM C177, ASTM C518
Declared thermal conductivity
Θm50 °F (10 °C)75 °F (24 °F)100 °F (38 °C)125 °F (52 °C)
λd ≤ [W/(m·K)] 0.0400.0400.0410.043
k ≤ [Btu-in/(h-ft²-°F)]0.2780.280.2890.300
Range1 1/2" and 2" Walls (EPDM based)
ASTM C177, ASTM C518
R-Value for tubes5,6
ID / Wall thickness3/8" (10mm)1/2" (13mm)3/4" (19mm)1" (25mm)1-1/2" (38mm)2" (50mm)
1/4" (6 mm)2.83.86.48.3
3/8" (10 mm)2.83.35.97.313.719.7
1/2" (13 mm)2.63.35.57.212.718.2
5/8" (16 mm)2.63.45.67.212.017.2
3/4" (19 mm)2.43.35.57.011.316.2
7/8" (22 mm)2.43.35.47.010.815.5
1-1/8" (29 mm)2.33.35.47.210.114.5
1-3/8" (35 mm)2.23.25.37.29.613.7
1-5/8" (41 mm)2.53.25.17.29.213.1
1-1/2" IPS (48 mm)2.43.14.96.98.712.4
2-1/8" (54 mm)2.43.24.86.88.612.2
2" IPS (60 mm)2.43.25.27.18.812.3
2-5/8" (67 mm)2.43.24.76.58.211.6
2-1/2" IPS (73 mm)2.43.25.06.88.411.7
3-1/8" (79 mm)2.43.24.66.37.911.1
3" IPS (89 mm)2.33.14.96.68.111.2
3-5/8" (92 mm)3.14.56.27.710.7
4-1/8" (105 mm)3.14.56.17.510.5
4" IPS (114 mm)3.04.86.47.810.7
5" IPS (141 mm)3.04.76.27.510.2
6" IPS (168 mm)3.04.66.17.39.9
8" IPS (219 mm)2.94.55.97.09.5
10" IPS (273 mm)5.86.89.2
R-Value for sheets and rolls5,6
Wall thicknessR-value
1/4" (6mm)1.0
3/8" (10mm)1.5
1/2" (13mm)2.1
3/4" (19mm)3.1
1" (25mm)4.2
1-1/2" (38mm)6
2" (50mm)8
Fire Performance and Approvals
Surface burning characteristicsFlame Spread Index less than 25: Smoke Developed Index less than 50
NBR/PVC formulation up to one-inch thickness: EPDM for 1 1/2" and 2" thickness
NBR/PVC formulations in 1 1/2" and 2" thickness are not 25/50 rated		ASTM E84 and UL 723
FM approvedUp to 1-1/2" insulation thickness for tubes and up to 1" insulation thickness for sheetsFM 4924
UL standards
UL 94 5VA7Pass at 6 mm (1/4") and thicker.
UL 94 V-07Pass at 6 mm (1/4") and thicker.
Resistance to water vapour
Water vapour permeability0.05 perm-inch [0.725 x 10⁻¹³ kg/(s m Pa)] for NBR/PVC products
0.08 perm-inch [1.16 x 10⁻¹³ kg/(s m Pa)] for EPDM products		ASTM E96, procedure A
Resistance to water
Water absorption≤ 0.2% by volumeASTM C209, ASTM C1763
Physical attributes
Density3 to 6 pounds per cubic feet (48 to 96 kilograms per cubic feet)ASTM D1667
Acoustic performance
Sound absorption average
Thickness (mm)253850
Thickness (inches)11.52
SAA0.380.490.51
ASTM C4238
Health and environment
Mould growthPassedUL 181
Fungal growthPassedASTM C1338, ASTM G21

1At temperatures below -20°F (-29°C), elastomeric insulation starts to become less flexible. However, this does not affect the performance of AP/ArmaFlex in terms of thermal efficiency and resistance to water vapour permeability.

2For temperatures below -40 °F(-40 °C), please contact our Customer Service Centre.

3AP/ArmaFlex insulation can withstand temperatures as high as 250 °F (121 °C) when tested according to ASTM C411 - Standard Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation.

41 1/2" and 2" AP/ArmaFlex tubes are formulated with EPDM rubber giving them a higher upper temperature than AP/ArmaFlex tubes less than 1 1/2" wall thickness.

5These specifications are based on the measurements methods employed by Armacell. Other methods may not result in the same values and cannot be used to determine if the product is within the given tolerance.

6Please see technical bulletin #1 for more details.

7UL File No. E55798.

8Type A Mounting