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Product

Industrial heating & heat-tracing cablesAlloy 825 / SS 316L / MgO300/500 V & 600 V · 270 W/mMaintain +600 °C · Exp +800 °C

Mineral-Insulated Heating Cable300/500 V & 600 V MgO-insulated metal-sheathed heating cable up to +600/+800 °C

High-temperature mineral-insulated (MI) metal-sheathed series heating cable to IEC/IEEE 60079-30-1, IEC 60800 and IEEE 515, pairing 1 or 2 resistance cores with compacted MgO inside a seamless Alloy 825, Inconel 600 or SS 316L sheath up.

Flame-retardant
Oil-resistant
Outdoor & humid
Approved
Order designation
MIQ-2C-825-0.200 · 600 V
Res. @20°C
0.200 Ω/m
Max exp.
800 °C
Cable OD
6.4 mm
Mass ≈
138 kg/km
All sizes (16)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Maintain temp.
Up to +600 °C
Max exposure +650 °C to +800 °C
Linear output
Up to 270 W/m
200–270 W/m continuous thermal output
Rated voltage
300/500 & 600 V
1-core & 2-core 300/500 V or 600 Vac
Dielectric
Compacted MgO
100 % inorganic non-ageing dielectric
Outer sheath
Alloy 825 / 316L
Also Inconel 600 & Cupro-Nickel 70/30
Min. bend radius
6 × OD
Annealed metal tube (3.2–9.5 mm OD)

Typical values for this cable type, based on IEC/IEEE 60079-30-1, IEC 60800 & IEEE 515 — confirmed in the datasheet and quotation for your order.

Application fit

Is Mineral-Insulated Heating Cable right for your machine?

Seamless metal-sheathed MgO mineral-insulated heating cable for extreme temperatures (+250 °C to +600/+800 °C), high watt density (up to 270 W/m) and severe corrosive or radiation duty.

Furnace, kiln & high-temp zone

Suitable

Primary duty — high-temperature steam headers, coker lines, molten salt/sodium piping and reactors up to +600/+800 °C.

Fixed installation

Suitable

Fixed high-watt-density pipe, vessel, hopper and valve tracing strapped directly to metal surfaces.

Offshore platform & shipboard deck trays

Suitable

Seamless Alloy 825 (UNS N08825) sheath resists chloride stress-corrosion cracking, sour gas and marine exposure.

Immersion & wet locations

Suitable

Hermetically welded seamless metal tube is 100 % impermeable to water, steam, oils and solvents.

Motorised monospiral reel

Not suitable

Work-hardening metal sheath is strictly for static formed installations, never dynamic reeling.

Use (N)SHTÖU Reeling

Energy chain / drag chain

Not suitable

Rigid/semi-flexible solid metal tube cannot be used in moving drag chains.

Use Mica Glass Wire
Typical machinesRefinery delayed cokers, hydrocrackers & bitumen linesSuperheated steam headers, turbines & boiler blowdownConcentrated solar power (CSP) & nuclear molten-salt loopsPetrochemical pyrolysis, catalytic reformer & reactor pipingESP ash hoppers, flue-gas ducts & sulphur recovery unitsLNG cryogenic spill-pan & flare-header protection

Construction

Layer by layer

One or two solid resistance conductors (copper, CuNi or NiCr alloy) are embedded in high-density compacted magnesium oxide (MgO) mineral insulation inside a seamless drawn Alloy 825, Inconel 600, SS 316L or Cupro-Nickel 70/30 metallic tube (optional extruded HDPE/FEP anti-corrosion oversheath for buried or low-temp chemical runs).

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Solid resistance heating conductor(s)1 or 2 solid conductors in oxygen-free copper, CuNi resistance alloys or NiCr 80/20 (0.0028 to 28.0 Ω/m at 20 °C)IEC 60079-30-1 / IEEE 515
2Compacted high-purity magnesium oxide (MgO)High-density compressed inorganic MgO mineral dielectric powder providing high thermal conductivity and non-melting electrical isolationIEC 60800 / ASTM E235
3Seamless drawn metallic earth & barrier tubeSeamless TIG/laser-welded and drawn Alloy 825 (UNS N08825), Inconel 600 (UNS N06600), SS 316L or CuNi 70/30 continuous metal sheathIEC 60079-30-1 / IEEE 515
4Annealed bright metal surface (or optional polymer jacket)Bright-annealed bare alloy sheath for +600/+800 °C service (optional extruded FEP/HDPE oversheath for ≤ +200 °C corrosive/buried zones)IEC 60079-30-1

MI-825 / MI-600 · Seamless Alloy 825 or Inconel 600 Sheath

300/500 V & 600 V · Maintain +600 °C · Max exposure +800 °C · 1C or 2C resistance core + compacted MgO + chloride-SCC-immune Alloy 825 / 600 sheath

MI-316L · Seamless Stainless Steel 316L Sheath

300/500 V & 600 V · Maintain +500 °C · Max exposure +650 °C · 1C or 2C resistance core + compacted MgO + annealed SS 316L sheath

MI-CuNi · Cupro-Nickel 70/30 Sheath

300/500 V · Maintain +300 °C · Max exposure +400 °C · High-ductility 70/30 cupro-nickel sheath for medium-temperature marine & industrial tracing

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC/IEEE 60079-30-1, IEC 60800 & IEEE 515. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage
300/500 Vac & 600 Vac (1-core and 2-core)
Resistance range
0.0028 to 28.0 Ω/m at +20 °C (±10 % tol.)
Dielectric withstand
2.0 to 2.5 kV AC RMS for 1 min (core-sheath)
Insulation resistance
≥ 1,000 MΩ at 1,000 Vdc (sealed factory unit)

Thermal

Max. maintain temp.
Up to +600 °C (Alloy 825 / Inconel 600)
Max. sheath exposure
+650 °C (SS 316L) · +800 °C (Alloy 825 / 600)
Linear watt density
Up to 200–270 W/m (depending on pipe T)
Min. installation T
−60 °C (down to −196 °C cryogenic service)

Mechanical

Cable outer diameter
3.2 mm to 9.5 mm seamless annealed metal tube
Min. bending radius
6 × cable OD (hand-formable annealed sheath)
Impact & crush resistance
Exceeds 7 J impact & 2,000 N crush load
Hot-to-cold junction
Factory-brazed / laser-welded cold transition

Resistance

Fire & flammability
100 % non-combustible inorganic metal + MgO
Stress-corrosion cracking
Alloy 825 (42% Ni) immune to chloride SCC
Chemical & oil resistance
Seamless alloy tube resists acids, H2S & oils
Radiation resistance
Inorganic MgO + alloy withstands > 10⁷ Gy

Reference standards

Applicable standards
IEC 60079-30-1, IEC 60800, IEEE 515, ASTM E235
Sheath alloy standards
ASTM B423 (825), B167 (600) & A269 (316L)
Pressure test
Pneumatic / He-leak & hydrostatic sheath test
RoHS & REACH
Asbestos-free, RoHS & REACH compliant

Identification

Tag & laser marking
SS tag + laser print: Model, Ω/m, V, W, S/N
Sheath finish
Bright annealed metal (or orange FEP jacket)
Factory unit code
[1C/2C]-[Alloy]-[Ω/m]-[Heated L]-[Cold L]
Customs tariff (HS)
8544.49 / 8516.80 (mineral-insulated heaters)

Sizes

16 standard Mineral-Insulated (MI) heating cable sizes across 1-core & 2-core Alloy 825 / SS 316L (300/500 V & 600 V)

Conductor count, nominal resistance at 20 °C (Ω/m), conductor metallurgy, sheath alloy, voltage grade, outer diameter and mass.

Resistance steps, sheath alloy, OD & mass
MI cable designationCores
count		Res. @20°C
Ω/m		Conductor
alloy		Sheath
alloy		Rated
Vac		Max exp.
°C		Cable OD
mm		Mass ≈
kg/km		Enquiry
MIQ-1C-825-0.003 · 600 V1C0.003CopperAlloy 825600 Vac8006.4155
MIQ-1C-825-0.006 · 600 V1C0.006CopperAlloy 825600 Vac8005.5112
MIQ-1C-825-0.015 · 600 V1C0.015CopperAlloy 825600 Vac8004.882
MIQ-1C-825-0.040 · 600 V1C0.040CuNi AlloyAlloy 825600 Vac8004.676
MIQ-1C-825-0.100 · 600 V1C0.100CuNi AlloyAlloy 825600 Vac8004.366
MIQ-1C-825-0.250 · 600 V1C0.250CuNi44Alloy 825600 Vac8004.365
MIQ-1C-825-0.650 · 600 V1C0.650CuNi44Alloy 825600 Vac8004.056
MIQ-1C-825-1.600 · 600 V1C1.600NiCr 80/20Alloy 825600 Vac8003.748
MIQ-1C-825-4.000 · 500 V1C4.000NiCr 80/20Alloy 825500 Vac8003.236
MIQ-2C-825-0.030 · 600 V2C0.030CopperAlloy 825600 Vac8008.2225
MIQ-2C-825-0.080 · 600 V2C0.080CuNi AlloyAlloy 825600 Vac8007.3178
MIQ-2C-825-0.200 · 600 V2C0.200CuNi AlloyAlloy 825600 Vac8006.4138
MIQ-2C-825-0.500 · 600 V2C0.500CuNi44Alloy 825600 Vac8005.8112
MIQ-2C-316L-1.250 · 500 V2C1.250CuNi44SS 316L500 Vac6505.290
MIQ-2C-825-3.600 · 500 V2C3.600NiCr 80/20Alloy 825500 Vac8004.980
MIQ-2C-825-11.500 · 500 V2C11.500NiCr 80/20Alloy 825500 Vac8004.054
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • All sizes are available in Alloy 825 (UNS N08825), Inconel 600 (UNS N06600), SS 316L (UNS S31603) or CuNi 70/30 sheath; 2C resistance is loop resistance 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 test2.0 kV to 2.5 kV RMS AC for 1 min between resistance conductors and metal sheathEvery heating unit
1,000 Vdc MgO insulation resistance testInsulation resistance ≥ 1,000 MΩ verified at 1,000 Vdc after hermetic end-seal brazingEvery heating unit
Circuit DC resistance & cold-lead weld checkTotal loop resistance verified within ±10 % at 20 °C and X-ray/visual inspection of hot-cold spliceEvery heating unit
Sample tests
Hydrostatic / helium sheath integrity & mandrel bendSeamless tube pressure leak check and 6 × OD mandrel bend test followed by dielectric withstandProduction lot

Inspection certificate

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

Product approvals

Alloy 825 / SS 316L / MgOCE · LVDRoHS · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX · [MIQ TAG] · [ALLOY 825 / 316L] · [V / W / Ω] · [HEATED L / COLD L] · IEC 60079-30-1 · SERIAL NO.
Delivery form
Factory-terminated heating units (cold leads + brass/SS glands) or bulk coils
Lengths
Custom engineered heated lengths with 1.5–3.0 m cold leads
Certificate
EN 10204 3.1 inspection certificate with every dispatch
Quote response
Engineering specification and quote within 2 business hours

Technical documents

Downloads

PDFMineral-Insulated Heating Cable – technical datasheet16 sizes · construction, technical data, approvalsXLSXMineral-Insulated 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 is Alloy 825 preferred over 304 or 316L stainless steel for mineral-insulated heating cable sheaths?
Austenitic stainless steels (304 and 316L) are susceptible to chloride stress-corrosion cracking (SCC) between +60 °C and +200 °C when trace chlorides leach from wet thermal insulation or coastal air. Seamless Alloy 825 (UNS N08825, ~42 % nickel, 21.5 % chromium, 3 % molybdenum) is virtually immune to chloride SCC while withstanding +600 °C continuous maintenance and +800 °C exposure.
When should I choose 2-conductor (2C) versus 1-conductor (1C) MI heating cable?
A 2-conductor (2C) MI heating cable contains both the go and return resistance conductors inside one sheath, banded together at the far end cap, so only one cold-lead power connection is required on short pipes, valves and vessels. Single-conductor (1C) MI cables offer lower Ω/m and higher current capacity for long pipelines or three-phase star circuits.
Why are MI heating cables supplied as factory-terminated sets with cold leads?
Compacted magnesium oxide (MgO) powder is hygroscopic when exposed to open air. Factory-fabricated heating sets have hermetically brazed or laser-welded hot-to-cold junctions, moisture-sealed end caps and pre-installed compression glands tested to ≥ 1,000 MΩ at 1,000 Vdc, eliminating delicate field brazing and keeping the MgO dielectric permanently dry.
Can mineral-insulated heating cable be bent around small-bore pipes and valves?
Yes. Because the seamless Alloy 825 or SS 316L sheath is supplied in a bright-annealed temper over high-density MgO, cables from 3.2 mm to 9.5 mm OD can be formed by hand on site down to a minimum bending radius of 6 × cable OD (20 mm to 57 mm) to follow valves, pumps and instrument tubing.

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