therma-cel
®
Pipe Insulation Made in
Flexible Closed Cell Insulation America
INSTALLATION RESISTANCE TO MOISTURE
therma-cel® Pipe Insulation slides VAPOR FLOW
easily over pipe or tubing for quick The closed-cell structure and unique
installation. When applied to existing formulation of therma-cel® Pipe
lines, tubing is slit lengthwise and Insulation effectively retards the flow
snapped into place. All seams and of moisture vapor and is considered
butt joints should be adhered with a low transmittance vapor retarder.
RBX R-320 Contact Adhesive or other For most applications, therma-cel®
approved sealing system, making sure Pipe Insulation needs no additional
both surfaces to be joined are coated protection.
with adhesive. Fittings can be fabri-
Additional vapor barrier protection
cated from miter-cut tubular sections.
may be necessary for therma-cel®
therma-cel® Pipe Insulation is easily
Pipe Insulation when installed on
cut with a sharp knife.
low temperature surfaces that are
exposed to continuous high humidity.
OUTDOOR APPLICATIONS
therma-cel® Pipe Insulation is made
FLAME AND SMOKE RATING
from UV resistant polyolefin resins.
DESCRIPTION therma-cel® Pipe Insulation in wall
For moderate UV exposure, no addi-
therma-cel® Pipe Insulation is a thicknesses of 1" (25 mm) and below
tional protection is needed. However,
flexible, polyethylene, thermal has a flame spread rating of 25
for severe UV exposure (rooftop
insulation. It is black in color, or less and a smoke development
applications) or where optimum per-
marked in yellow ink and available rating of 50 or less as tested
formance is required, a protective
in semi-slit and unslit tubular form by ASTM E 84 Method of Testing
coating (high quality exterior acrylic
in wall thicknesses of 3/8", 1/2", entitled: “Surface Burning Char-
latex paint) should be applied. Refer
3/4" and 1", in sizes ranging from acteristics of Building Materials.�
to installation guidelines for specific
3/8" to 4" IPS.
instructions. Numerical flammability ratings alone may not define
the performance of products under actual fire
APPLICATIONS conditions. They are provided only for use in the
UNDERGROUND selection of products to meet limits specified, when
therma-cel® Pipe Insulation is used compared to a known standard.
For buried lines above the water
to retard heat gain and prevent con-
table, use a clean fill such as sand
densation or frost formation on cold SPECIFICATION COMPLIANCE
(3"-5" layer) to protect therma-cel®
water plumbing, chilled water and air ASTM C-1427
Pipe Insulation before backfilling.
conditioning lines. therma-cel® Pipe New York City MEA 305-92-M Vol. IV
It is recommended that materials to
Insulation also retards heat loss on USDA Requirements
be buried are properly sealed at all
hot water plumbing. ASTM E 84 1" 25/50-tested
seams and butt joints with an RBX-
according to UL 723 and NFPA 255
therma-cel® Pipe Insulation has a approved contact adhesive. For opti- Complies with requirements of
low thermal conductivity and very mum performance, the lines should CAN/ULC S102-M88
low water vapor transmission rate. be encased in a conduit to protect
CFC/HCFC Free
This low density product demon- them from problems associated Halogen Free
strates excellent thermal, physical with ground water.
and chemical resistant properties
and has a broad service temperature
range between -160°F and 200°F
(-105°C and 92°C). It can be
installed in commercial, industrial
and residential insulation projects.
Phone 800-765-6475
therma-cel ®
Pipe Insulation
PRODUCT DATA
therma-cel® Test
Physical Properties Pipe Methods
Insulation
Thermal Conductivity (K) 90°F (32°C) Mean Temp .255 (.037) ASTM C 177
BTU -in/hr - Ft - °F (W/mK) 75°F (24°C) Mean Temp .250 (.036) ASTM C 177
2
50°F (10°C) Mean Temp .245 (.035) ASTM C 177
Operating Temperature Range Upper 200°F (92°C)
Flexible to -100°F (-73°C) Lower -160°F (-105°C)
Water Vapor Permeability Dry Cup. Perm-In .05 ASTM E 96
Ozone Resistance Pass ASTM D 1171
Chemical/ Solvent Resistance Good
Mildew Resistance/Air Erosion Pass UL 181
Thickness Recommendations* - To Control Condensation
Pipe Size Line Temp Line Temp Line Temp Line Temp
50°F 10°C 35°F 2°C 0°F -18°C -20°F -29°C
Normal Conditions (Max 85°F, 29°C - 70% R.H.)
3/8" I.D. thru 1-3/8" 3/8" 10 mm 1/2" 13 mm 3/4" 19 mm 1" 25 mm
Over 1-3/8" thru 3-1/8" 3/8" 10 mm 1/2" 13 mm 1" 25 mm 1" 25 mm
Over 3-1/8" thru 4-1/2" ** 3/8" 10 mm 1/2" 13 mm 1" 25 mm 1" 25 mm
Over 4-1/2" 1/2" 13 mm 3/4" 19 mm 1" 25 mm 1-1/4" 32 mm
Mild Conditions (Max 80°F, 26°C - 50% R.H.)
3/8" I.D. thru 2-1/8" 3/8" 10 mm 3/8" 10 mm 1/2" 13 mm 1/2" 13 mm
Over 2-1/8" thru 3-1/8" 3/8" 10 mm 3/8" 10 mm 1/2" 13 mm 1/2" 13 mm
Over 3-1/8" thru 4-1/2" ** 3/8" 10 mm 3/8" 10 mm 3/4" 19 mm 3/4" 19 mm
Over 4-1/2" 3/8" 10 mm 1/2" 13 mm 3/4" 19 mm 3/4" 19 mm
Severe Conditions (Max 90°F, 32°C - 80% RH)
3/8" I.D. thru 1-1/8" I.D. 3/4" 19 mm 3/4" 19 mm 1-1/4" 32 mm 1-1/4" 32 mm
Over 1-1/8" I.D. thru 4-1/2" 3/4" 19 mm 1" 25 mm 1-1/2" 38 mm 1-1/2" 38 mm
Over 4-1/2" 3/4" 19 mm 1" 25 mm 1-1/2" 38 mm 2" 50 mm
*therma-cel® Pipe Insulation in thickness noted within the specified temperature ranges will prevent condensation on indoor piping under design
conditions defined below. Thickness recommendations above 1� can be sleeved to achieve thickness desired.
Normal: Maximum severity of indoor conditions seldom exceed 85°F (29°C) and 70% R.H. in United States.
Mild: Typical conditions are most air-conditioned spaces and arid climates.
Severe: Generally found in areas where excessive moisture is introduced or in poorly ventilated areas where the temperature may be depressed
below the ambient.
Under conditions of high humidity, additional thickness of insulation may be required.
**Available: Nom. 1/2� or Nom. 3/4� thickness only.
therma-cel® “R� Values per square foot
Pipe O.D. or Nominal R Value R Value R Value R Value
Insulation I.D. 3/8" (10 mm) Wall 1/2" (13 mm) Wall 3/4" (19 mm) Wall 1� (25 mm) Wall
3/8" 10 mm 2.5 3.6 6.0 8.8
1/2" 13 mm 2.3 3.3 5.5 8.0
5/8" 16 mm 2.2 3.1 5.2 7.5
3/4" 19 mm 2.1 3.0 4.9 7.1
7/8" 22 mm 2.0 2.9 4.7 6.8
1-1/8" 29 mm 1.9 2.7 4.4 6.5
1-3/8" 35 mm 1.9 2.6 4.2 6.1
1-5/8" 41 mm 1.8 2.5 4.1 5.8
2" 50 mm 1.8 2.4 3.9 5.5
2-1/8" 54 mm 1.7 2.4 3.9 5.5
2-3/8" 60 mm 1.7 2.4 3.8 5.3
2-5/8" 67 mm 1.7 2.3 3.7 5.2
2-7/8" 72 mm 1.7 2.3 3.7 5.1
3-1/8" 79 mm 1.7 2.3 3.6 5.1
3-1/2" 89 mm 1.7 2.3 3.6 5.0
3-5/8" 92 mm 1.6 2.3 3.5 4.9
4-1/8" 105 mm 1.6 2.2 3.5 4.8
4-1/2" 115 mm 1.6 2.2 3.5 4.8
Note: “R� factors were calculated using a K factor of .250 (75°F, 24°C mean temp.) and nominal wall thickness is each case.
Lower operating temperatures will result in improved R values. Contact RBX Industries, Inc. for specific recommendations.
RBX Industries, Inc., 5221 ValleyPark Drive, Roanoke, VA 24019-3074
phone 800-765-6475 fax 800-656-9465
©February 2003 RBX Industries, Inc. therma-cel, RBX, and RBX Industries are registered trademarks of RBX Industries, Inc. Nomaco is a
registered trademark of Nomaco Inc. and NOMACO K-FLEX is a trademark of NOMACO K-FLEX. THER-0001-PS-0203
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