Chromalox Heat Tracing Products Selection Guide
Heating Cable
Heat Tracing Products
Application & Selection
Guidelines
Step 1 — Collect Required
General Product Summary
This section is designed to assist you in
determining the appropriate cable for use in
your application.
Step 1 — Collect Required Application Data
and Determine Heat Loss
Step 2 — Choose the cable that best meets
your specific application parameters based
on the summary. Consideration of application
temperature, exposure temperature, application requirements and environmental ratings
should be made.
Step 3 — Select Heating Cable Wattage Rating
Step 4 — Determine Total Cable Required
Step 5 — Determine Circuits and Circuit
Protection
Step 6 — Select Appropriate Accessories
Application Data & Determine
Heat Loss
Application data required can be split into two
categories. The first is the heat loss data. This
includes:
• Maintenance Temperature
• Minimum Ambient Temperature
• Pipe Size
• Insulation Type (or K factor)
• Insulation Thickness
• Indoor/Outdoor Installation
• Maximum Expected Wind Speed
• Required Safety Factor.
Refer to the Technical section of this catalog,
“Determining Heat Energy Requirements —
Pipe & Tank Tracing” for details on
performing heat loss calculations. For Commercial Freeze Protection, please see Cable
Selection Tables in this section.
The second category of data required is the
application and environmental conditions. This
includes:
• Maximum Exposure Temperature
(Power Off Condition)
• Circuit Length Considerations
• Available Voltage
• Hazardous Area Requirements
• Type of Pipe (Plastic or Metal)
• Chemical Exposure
• Fire Resistance.
Step 2 — Select the Cable
Choose the cable that best fits your specific
application parameters and wattage requirements.
Heat Tracing Product Features
Industrial Commercial
Features
Max. Maintenance Temp. (°F) 150 225 302 320 302 900 100 50 225
Max. Exposure Temp. (°F)
Power Off
Max. W/Ft. 10 15 20 12 12 50 8 12 15
Max. Circuit Length (Ft.) 95-660 55-750 150-750 225-900 7,500 330-1,000 180-660 135-540 500-800
Buss Wire Size 16 16 16 12 16,14,12,10 N/A 16 16 16
Voltages
Hazardous Ratings Yes Ye s Yes Ye s Yes Yes No No No
Usable on Plastic Pipe Yes No No No No No Ye s Ye s Yes
Cut-to-Length in Field Ye s Yes Ye s Ye s Ye s No Ye s Ye s Ye s
Field Splicable Yes Yes Ye s Ye s Ye s No Ye s Ye s Ye s
Can be Overlapped Yes Ye s Ye s No No No Ye s Ye s Ye s
Output Varies with Temp. Ye s Ye s Yes No No No Yes Yes Ye s
Varies Output Along Length Yes Ye s Ye s No No No Ye s Ye s Ye s
Design of System Simple Simple Simple Simple Involved Involved Simple Simple Simple
Installation of System Easiest Easiest Easiest Simple Simple Involved Easiest Easiest Easiest
Fire Resistance Fair Fair Fair Fair Fair Excellent Fair Fair Fair
Chemical Resistance
Size (Max. In.) .435x.185 .435x 185 .435x.185 .435x.235 .435x.185 0.4 .435x.185 .435x.185 .435x.185
Accessories DL/EL/U D/UL DL/U DL/EL/U U DL/EL/U RG Access. DL/U
Monitor Wire Available
Applications
SRL SRP SRM/E CWM SLL Alloy 825 MI SRF SRF-RG HWM
185 275 420 400 450 1,100 185 185 275
120,
208-277
See Corrosion Guide, next page
Yes Ye s
FL,PL
FL = Freeze Protection
FH = Freeze Protection, High Exposure Temp.
PL = Process Maintenance, Low Temperature
120,
208-270
FL,FH,
PL,PH
120,
208-277
Contact
Factory
FL,FH,
PL,PH
120,
208-277, 480
Contact
Factory
FL,FH,
PL,PH
120-600 Up to 600
No No No No Yes
FL,FH,
PL,PH
PH = Process Maintenance, High Temperature
RG = Roof and Gutter De-icing
HWM = Hot Water Maintenance
FL,FH,
PL,PH
120,
208-277
FL RG HWM
120,
208-277
120,
208-270
PRODUCTS
HEAT TRACING
G-5
Heating Cable
Heat Tracing Products
Application & Selection Guidelines (cont’d.)
Agency Approvals
Area SRL-C SRL-CR SRL-CT HSRL SRM/E-C SRM/E-CT SRP HSRM CWM-C CWM-CT MI SRF-C SRF-CR SRF-RG HWM
Ordinary Area
UL
Factory Mutual
CSA
ATEX
Class 1 Div 2, Groups B,C,D
UL
Factory Mutual
CSA
ATEX
Class II Div 2, Groups F,G
UL
Factory Mutual
CSA
ATEX
Class III Div 2
UL
Factory Mutual
CSA
ATEX
Class 1 Div 1, Groups B,C,D*
UL
Factory Mutual
CSA
ATEX
Class II Div 1, Groups F,G
UL
Factory Mutual
CSA
ATEX
Class III Div 1
UL
Factory Mutual
CSA
ATEX
Zone 2 and Zone 22
Factory Mutual
CSA
ATEX
Zone 1 and Zone 21
Factory Mutual
CSA
ATEX
*ClassI,DivisionI,GroupsB,C&D-UL,CSA,FM-ContactyourLocalChromaloxSalesofcefordesignassistance.
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓ ✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓✓✓
✓ ✓
✓✓✓
✓✓✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Corrosion Guide to Select Proper Cable Construction
Industrial Commercial
Exposure To
Moisture C, CR, CT C, CT C, CT CT CT C, CT CT Yes C, CR Yes C, CT
Aqueous Solutions of
Inorganic Compounds
Liquids Organic
Chemicals
Acids or Bases CT CT CT CT CT CT CT No No No CT
Note — This is a recommendation guide. Chromalox cannot warrant any Electric Heat Trace against failure by sheath degradation if such failure
is the result of operating conditions beyond the control of the heater manufacturer. It is the responsibility of the purchaser to make the
ultimate choice of sheath material based on knowledge of the chemical composition of the corrosive solution, character of materials
entering the solution, and controls which maintains the process.
G-6
SRL SRM/E SRP HSRL HSRM CWM SLL Alloy 825 MI SRF SRF-RG HWM
CR, CT CT CT CT CT CT CT No No No CT
CT CT CT CT CT CT CT Yes No No CT
Loading...