1 / 5

Product

Industrial heating & heat-tracing cables0.0018–1.8 Ω/m Series450/750 V · 0.6/1 kV200–3,500 m · Max +260 °C

Series Resistance Heating Cable450/750 V & 0.6/1 kV fluoropolymer series trace heating cable up to +260 °C

Long-line series resistance heating cable to IEC/IEEE 60079-30-1, IEC 62395-1 and IEEE 515 in 1-, 2- and 3-core designs (0.0018–1.8 Ω/m), combining PTFE/PFA insulation, tinned-copper earth braid and PFA sheath for single-feed pipeline.

Flame-retardant
Oil-resistant
Outdoor & humid
Approved
Order designation
SRQ-3C-00074 · 3-Phase Star
Res. @20°C
7.4 Ω/km
Max exp.
260 °C
Nominal OD
10.2 mm
Mass ≈
175 kg/km
All sizes (16)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Resistance range
0.0018–1.8 Ω/m
1.8 to 1,800 Ω/km @ 20 °C (±5 %)
Circuit length
200–3,500 m
Single power feed for long pipelines
Max. exposure T
+260 °C
Maintain up to +200 °C · Exp. +260 °C
Rated voltage
450/750–1000 V
230 V, 400 V, 480 V, 600 V & 690 V
Linear output
Up to 40 W/m
Custom W/m = I² × R along full length
Min. bend radius
5 × OD
Concentric round or flat twin/3-core

Typical values for this cable type, based on IEC/IEEE 60079-30-1 & IEEE 515 — confirmed in the datasheet and quotation for your order.

Application fit

Is Series Resistance Heating Cable right for your machine?

Engineered series-resistance PTFE/PFA heating cable for long transfer pipelines, pipe racks and tank-to-jetty lines from 200 m to 3,500 m powered from a single supply point.

Fixed installation

Suitable

Primary duty — long-line transfer pipelines, overland pipe racks and three-phase balanced 3-core tracing.

Offshore platform & shipboard deck trays

Suitable

PTFE/PFA dual-fluoropolymer construction resists steam purge (+260 °C), sour hydrocarbons, acids and marine salt mist.

Immersion & wet locations

Suitable

Pinhole-free extruded PFA/FEP outer sheath over tinned-copper braid withstands wet outdoor culverts and washdown.

Furnace, kiln & high-temp zone

Not suitable

Fluoropolymer PTFE/PFA insulation is capped at +260 °C continuous exposure; use MI cable above +260 °C.

Use MI Heating Cable

Motorised monospiral reel

Not suitable

Fixed pipeline trace heater engineered for a specific circuit length; never run on dynamic reels.

Use (N)SHTÖU Reeling
Typical machinesLong-distance crude, fuel-oil & chemical transfer linesTank-farm to marine jetty loading & bunkering pipelinesSteam-condensate return & cross-plant utility headersBitumen, molten sulphur & heavy-residue pipe racksSub-zero water supply & tailings transport pipelinesLNG / petrochemical complex interconnect corridors

Construction

Layer by layer

One, two or three stranded resistance conductors (copper for ultra-low Ω/m long runs, or calibrated CuNi / NiCr resistance alloys for medium runs) are insulated with high-dielectric PTFE/PFA fluoropolymer, wrapped with a thermal-diffusion glass/PTFE bedding tape, screened with a ≥ 70 % tinned-copper protective earth braid and sheathed in extruded PFA/FEP.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Calibrated series resistance conductor(s)1, 2 or 3 stranded conductors in nickel-plated copper (1.5–16 mm²) or CuNi / NiCr resistance alloys (0.0018 to 1.8 Ω/m at 20 °C)IEC 60079-30-1 / IEEE 515
2PTFE / PFA fluoropolymer core insulationHeavy-wall PTFE or melt-extruded PFA primary dielectric rated for 450/750 V (0.6/1 kV grade) and +260 °C continuous exposureIEC 60079-30-1
3PTFE / glass-fibre thermal bedding tapeLapped PTFE/fibreglass binder tape equalising radial thermal flux and cushioning the core assemblyIEC 60079-30-1
4Tinned / nickel-plated copper earth braidClosely woven tinned or nickel-plated copper wire braid (≥ 70 % optical coverage) providing continuous protective earthingIEC 60079-30-1 Clause 4.4
5Extruded PFA / FEP fluoropolymer outer sheathPinhole-free extruded perfluoroalkoxy (PFA) or FEP outer jacket resistant to +260 °C steam purge, hydrocarbons and corrosive chemicalsIEC 60079-30-1 / IEEE 515

1C Series · Single-Core Loop / 3-Phase Star (0.0018–1.8 Ω/m)

450/750 V & 0.6/1 kV · +260 °C · Single resistance core + PTFE/PFA wall + SnCu braid + PFA outer sheath for 3×1C balanced 3-phase pipelines

2C Series · Twin-Core Single-End Return (0.007–1.8 Ω/m)

450/750 V · +260 °C · Twin resistance cores looped at the far end so power supply and termination remain at one end of the pipe

3C Series · Three-Core Balanced 3-Phase (0.0018–0.50 Ω/m)

450/750 V & 0.6/1 kV · +260 °C · Three star-connected resistance cores in one jacket for single-feed 400–690 V pipelines up to 3,500 m

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC/IEEE 60079-30-1 & IEEE 515. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage grade
450/750 V & 0.6/1 kV (up to 600/690 Vac)
Conductor resistance
0.0018 to 1.8 Ω/m (1.8–1,800 Ω/km @ 20 °C)
Resistance tolerance
±5 % (alloys) or per IEC 60228 Class 2/5 Cu
Dielectric withstand
2.5 kV to 3.5 kV AC for 1 min (core-to-braid)

Thermal

Max. exposure temp.
+260 °C continuous (PTFE / PFA fluoropolymer)
Max. maintain temp.
Up to +200 °C (depending on W/m & T-class)
Max. linear output
Up to 30–40 W/m (circuit-specific design)
Min. installation T
−60 °C (fluoropolymer PTFE / PFA jacket)

Mechanical

Core configurations
Single-core (1C), twin (2C) & 3-core (3C)
Min. bending radius
5 × OD (or 25 mm minimum, fixed routing)
Impact & crush test
7 J / 2 J impact & 1,500 N deformation load
Length alteration
Do not cut to length; cutting alters Ω & W/m

Resistance

Flame retardance
IEC 60332-1-2 & UL VW-1 flame retardant
Chemicals & oils
Inert to acids, alkalis, solvents & sour oil
Steam-purge resilience
Withstands +260 °C saturated steam purging
Moisture & UV
Non-hygroscopic (< 0.01 %) & UV immune

Reference standards

Applicable standards
IEC/IEEE 60079-30-1, IEC 62395-1 & IEEE 515
System design standard
IEC/IEEE 60079-30-2 & IEEE 515 design guide
Earth fault device
30 mA RCD / GFPD required per IEC 60079-30-2
RoHS & REACH
RoHS 2011/65/EU & REACH compliant materials

Identification

Resistance code print
Nominal Ω/km or Ω/m at +20 °C on outer sheath
Core identification
1C: Natural/Red · 2C: Bk/Rd · 3C: Bk/Rd/Bu
Outer sheath colour
Red, Blue or Black PFA / FEP with metre marks
Customs tariff (HS)
8544.49 (or 8516.80 electric heating cables)

Sizes

16 representative series resistance steps across 1-core, 2-core & 3-core PTFE/PFA cables (0.0018 to 1.8 Ω/m)

Conductor resistance at 20 °C (Ω/m and Ω/km), alloy metallurgy, core count, voltage grade, nominal dimensions and mass.

Resistance steps, core geometry & dimensions
Model · Resistance codeCores
count		Res. @20°C
Ω/m		Res. @20°C
Ω/km		Conductor
alloy / CSA		Voltage
grade		Max exp.
°C		Nominal OD
mm		Mass ≈
kg/km		Enquiry
SRQ-1C-00018 · 10 mm² Cu1C0.00181.8NiCu 10 mm²0.6/1 kV2607.8148
SRQ-1C-00031 · 6.0 mm² Cu1C0.00313.1NiCu 6.0 mm²0.6/1 kV2606.6102
SRQ-1C-00046 · 4.0 mm² Cu1C0.00464.6NiCu 4.0 mm²0.6/1 kV2605.876
SRQ-1C-00074 · 2.5 mm² Cu1C0.00747.4NiCu 2.5 mm²450/750 V2605.258
SRQ-1C-0012 · 1.5 mm² Cu1C0.012112.1NiCu 1.5 mm²450/750 V2604.745
SRQ-1C-0025 · CuNi Alloy1C0.025025.0CuNi2 2.5 mm²450/750 V2605.257
SRQ-1C-0050 · CuNi Alloy1C0.050050.0CuNi6 2.0 mm²450/750 V2605.052
SRQ-1C-0100 · CuNi Alloy1C0.1000100.0CuNi10 1.5 mm²450/750 V2604.746
SRQ-1C-0250 · CuNi23 Alloy1C0.2500250.0CuNi23 1.5 mm²450/750 V2604.745
SRQ-1C-0500 · CuNi44 Alloy1C0.5000500.0CuNi44 1.0 mm²450/750 V2604.439
SRQ-1C-1000 · NiCr Alloy1C1.00001,000.0NiCr 1.1 mm²450/750 V2604.540
SRQ-1C-1800 · NiCr Alloy1C1.80001,800.0NiCr 0.6 mm²450/750 V2604.234
SRQ-2C-0015 · Twin Loop2C0.014814.82×2.5 mm² NiCu450/750 V2608.6118
SRQ-2C-0200 · Twin Loop2C0.2000200.02×1.5 mm² CuNi450/750 V2608.096
SRQ-3C-00031 · 3-Phase Star3C0.00313.13×6.0 mm² NiCu0.6/1 kV26012.8310
SRQ-3C-00074 · 3-Phase Star3C0.00747.43×2.5 mm² NiCu0.6/1 kV26010.2175
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • For 2C twin-core cables, resistance values represent loop resistance per metre of cable; for 3C three-phase cables, resistance is stated per core per metre.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
AC dielectric voltage withstand test2.5 kV to 3.5 kV RMS AC for 1 min (2U + 1,000 V) between resistance cores and earth braidEvery circuit / reel
Calibrated DC conductor resistance checkDC resistance per metre verified at +20 °C within ±5 % tolerance across each coreEvery circuit / reel
Sample tests
260 °C fluoropolymer thermal aging & cold bendThermal endurance at +260 °C and −60 °C cold mandrel bend test without crackingProduction lot
Mechanical impact & crush deformation testImpact and 1,500 N crush verification followed by immersed dielectric withstand testProduction lot

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

0.0018–1.8 Ω/m SeriesCE · LVDRoHS · REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX · [SRQ MODEL] · [Ω/km @ 20°C] · [450/750V or 0.6/1kV] · PTFE/PFA +260°C · IEC 60079-30-1 · METRE MARK
Delivery form
Engineered factory-terminated circuits or bulk reels
Lengths
Custom circuit lengths from 200 m to 3,500 m per feed
Certificate
EN 10204 3.1 inspection certificate with every dispatch
Quote response
Engineering specification and quote within 2 business hours

Technical documents

Downloads

PDFSeries Resistance Heating Cable – technical datasheet16 sizes · construction, technical data, approvalsXLSXSeries Resistance Heating Cable spec data (Excel)All 16 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

Why are series resistance heating cables used instead of parallel cables on long transfer pipelines?
Parallel heating cables experience significant bus-wire voltage drop that restricts single circuit lengths to roughly 80–250 m. In a series resistance heating cable, the conductor itself is the calibrated heating resistor, allowing a single 400 V or 690 V three-phase supply point to heat 500 m to 3,500 m of pipeline with minimal voltage-drop distribution cabling.
Can a series resistance heating cable be cut to length in the field?
No. Because total circuit resistance R equals unit resistance (Ω/m) multiplied by length L, shortening a series cable at fixed supply voltage increases current and raises linear wattage W/m inversely with the square of the length ratio (P ∝ 1/L²). Always install the exact engineered circuit length.
How do 1-core, 2-core and 3-core series heating cables differ in pipeline layouts?
Single-core (1C) cables are used either in closed loops or applied as three separate passes connected in a three-phase star (wye) at the far end. Twin-core (2C) cables carry both go and return conductors inside one sheath for single-phase lines. Three-core (3C) cables integrate all three phases in a single jacket for balanced three-phase pipelines.
How is temperature class (T-class) compliance maintained on copper series cables?
Copper conductors have a positive temperature coefficient of resistance (+0.00393 K⁻¹), which slightly reduces current as temperature rises, while CuNi and NiCr alloys have nearly flat resistance curves. Both require active line-sensing RTD control and a high-temperature safety limiter per IEC/IEEE 60079-30-2 to guarantee sheath temperature stays below the T-class limit.

Request a quote

Get an engineering quote for Series Resistance Heating Cable

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

Series Resistance Heating Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

600 °C Mineral-Insulated

Mineral-Insulated Heating Cable

Alloy 825 / SS 316L MgO series heating cable for extreme temperatures up to +600/+800 °C.

View productZone-Parallel Constant Watt

Parallel Constant-Wattage Heating Cable

230/400 V zone-parallel constant-wattage tape for cut-to-zone process piping up to +205 °C.

View productPower-Limiting +235/+260 °C

VPL Power-Limiting Heating Cable

Coiled-resistor alloy PTC heating cable for high-temperature parallel pipe tracing.

View product200–260 °C PTFE Lead

PTFE High-Temperature Hook-Up Wire

NEMA HP 3 & UL 5251 PTFE fluoropolymer wire for high-temperature cold leads and junction boxes.

View product
DatasheetRequest a quote