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Self-Regulating Process Temperature

Chromalox SRP self-regulating heating cable provides safe, reliable heat tracing for process maintenance applications to 230°F (110°C) or freeze protection of pipes / tank with high heat losses. Constructed of industrial grade 16 AWG buss wire with a tinned copper braid and optional overjacketing, SRP ensures operating integrity most hostile industrial environments..

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The product

  • Self- Regulating, Energy Efficient
  • 16 AWG Buss Wire
  • Circuit Lengths to 750 ft.
  • Process Temperature Maintenance to 230°F (110°C)
  • Maximum Continuous Exposure Temperature, Power Off, 275°F (135°C)
  • Available in 5, 10, and 15 Watts per Foot
  • 120 and 208-277 Volts Available from Stock
  • Industrial Process Maintenance Applications
  • Approximate Size .47 in. W x .20 in. H
  • Min. Bend Radius 1-1/8 in.
  • For use on Metallic Pipes
  • Consult Factory for use on Plastic Piping
  • Factory Mutual (FM) approved for ordinary areas.
  • FM, ATEX and IECEx approved for hazardous (classified) areas when used with U Series and DL accessories.


  • Energy efficient, self-regulating SRP uses less energy when less heat is required.
  • Easy to install, SRP can be cut to any length (up to max circuit length) in the field.
  • SRP features lower installed cost than steam tracing, less maintenance expense and less down time.
  • SRP can be single overlapped without burnout, which simplifies heat tracing of in-line process equipment such as valves, elbows and pumps.
  • Because SRP is self-regulating, over-temperature conditions are minimized.
  • Chromalox U-Series Connection Kits reduce installation time.

Factory Mutual (FM) approved for ordinary areas. FM approved for hazardous (classified) areas when used with U Series and DL accessories

FM Approval:

  • Class I, Division 2, Groups B, C, D (Gases, vapors)
  • Class II, Divisions 1*&2, Groups F, G (Combustible dust)
  • Class III, Division 2 (Easily ignitable fibers and fillings)
  • Class I, Zone 1, AEx e II
  • 3,5,8 and 10 Watt Rated T4 Temperature Class

SRP Heat Trace Cable Applications

  • Freeze Protection
  • Freeze Protection, High Exposure Temperature
  • Process Maintenance, Low Temperature
  • Process Maintenance, High Temperature

Features of SRP Cable

Max. Maintenance Temp. (°F) 225
Max. Exposure Temp. (°F) Power Off 275
Max. W/Ft. 15
Max. Circuit Length (Ft.) 55-750
Buss Wire Size 16
Voltages 120, 208-270
Hazardous Ratings Yes
Usable on Plastic Pipe No
Cut-to-Length in Field Yes
Field Splicable Yes
Can be Overlapped Yes
Output Varies with Temp. Yes
Varies Output Along Length Yes
Accessories D/UL
Monitor Wire Available Yes
SRP Corrosion Selection Guide

Moisture C, CT
Aqueous Solutions of Inorganic Compounds CT
Liquids Organic Chemicals Acids or Bases CT
Acids or Bases CT

– Tin-Plated copper metallic braid for additional protection and ground path
– Fluoropolymer corrosion resistant overjacket over braid for hostile/corrosive environments

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