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Product

submarine & offshore armoured optical cable NEK TS 606 / IEC 60331-25Optical (-40 to +90 °C)SHF2 Oil & Mud-Resistant Outer Sheat

QFCU 4–48F NEK TS 606 & IEC 60331-25 Fire- & Mud-Resistant Steel-Braid Armoured Marine FO CableNEK TS 606 / IEC 60331-25 — Optical — -40 to +90 °C Subsea & Offshore Cable

QFCU 4–48F NEK TS 606 & IEC 60331-25 Fire- & Mud-Resistant Steel-Braid Armoured Marine FO Cable (NEK TS 606 / IEC 60331-25) engineered for Optical service across -40 to +90 °C (min. bend radius 12 × OD).

Water-resistant

Flame-retardant

Oil-resistant

Approved

Configuration

Order designation: QFCU NEK 606 FO 4–12F EOM/Sub
Outer Ø ≈: 8.2 mm
Net weight ≈: 260 kg/km
Tensile rating ≈: 48.0 kN
Core / stranding: Laser-welded SS FIMT + Steel/Aramid Armour

All sizes (3)

Request a quote Datasheet WhatsApp info@tebaoflex.com

Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: Optical
Operating temp.: −40…+90 °C
Min. bend radius: 12 × OD
Core / conductor: Mica-Protected G
Outer protection: SHF2 Oil & Mud-R
Standard: NEK TS 606 / IEC

Typical values for this cable type, based on NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification — confirmed in the datasheet and quotation for your order.

Application fit

Is QFCU NEK 606 FO right for your machine?

Fixed installation

Suitable

Laser-welded stainless-steel / copper-tube FIMT or water-blocked loose-tube construction protects ITU-T G.652D / G.654E / OM3/OM4 fibres.

Immersion & wet locations

Suitable

Hermetic metallic optical tube, steel vault and high-density PE/PUR serving withstand up to 8,000 m deep-ocean hydrostatic pressure.

Offshore platform & shipboard deck trays

Suitable

Galvanized steel or bronze wire armour and SHF2-MUD / PUR / PE jacket resist seabed abrasion, fishing-gear impact, oil and drilling mud.

Drilling jumbo & rotary mast feed

Suitable

NEK 606 QFCU and IEEE 1580 S670T executions maintain high-speed optical telemetry across hazardous offshore topside zones.

Energy chain / drag chain

Not suitable

Submarine and armoured offshore optical cable is not intended for indoor factory automation drag chains.

Use Deepwater ROV Optical Tether

Typical machinesMarine & Offshore CableSubmarine Telecom & Cabled Ocean ObservatoriesIsland, Coastal & Inter-Platform Subsea Optical LinksOffshore Platform & FPSO Fire-Safe Optical BackbonesTactical Marine & Harsh-Environment Optical Deployment

Construction

Layer by layer

Shown: QFCU NEK 606 FO (NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification) featuring mica-protected gel-filled loose tubes (4–48f), lszh inner bedding sheath and shf2 oil & mud-resistant outer sheath (4-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Mica-Protected Gel-Filled Loose Tubes (4	PBT loose tubes wrapped with fire-resistant mica tape (IEC 60331-25)
2	LSZH Inner Bedding Sheath	Halogen-free flame-retardant inner protective jacket
3	Galvanized Steel Wire Braid (GSWB)	High-coverage galvanized steel wire braid armour
4	SHF2 Oil & Mud-Resistant Outer Sheath	Cross-linked low-smoke zero-halogen SHF2 offshore jacket

QFCU NEK 606 FO — Standard Subsea & Offshore Execution

Built to NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification with mica-protected gel-filled loose tubes (4–48f) and shf2 oil & mud-resistant outer sheath

QFCU NEK 606 FO — Custom Continuous Winch / Reel Length

Available in custom continuous subsea winch, tow or seabed lengths with water-blocked terminations

QFCU NEK 606 FO — Hydrostatic, Tensile & Routine Certified

Supplied with EN 10204 3.1 routine dielectric, optical OTDR / DC resistance & tensile test report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: Optical (NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification)
Core / conductor construction: Mica-Protected Gel-Filled Loose Tubes (4–48F) — PBT loose tubes wrapped with fire-resistant mica tape (IEC 60331-25)
Primary dielectric / buffering: LSZH Inner Bedding Sheath — Halogen-free flame-retardant inner protective jacket

Thermal

Continuous operating temperature: −40…+90 °C (subsea & offshore duty)
Hydrostatic & thermal stability: Verified thermal and hydrostatic stability per NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification
Storage & transport temperature: −40…+80 °C on export wooden/steel winch reel

Mechanical

Outer protection / armouring: SHF2 Oil & Mud-Resistant Outer Sheath — Cross-linked low-smoke zero-halogen SHF2 offshore jacket
Minimum bending radius: 12 × OD
Armour, strength member & mechanical duty: Galvanized Steel Wire Braid (GSWB) — High-coverage galvanized steel wire braid armour

Resistance

Seawater, hydrostatic & hydrolysis resistance: Engineered for continuous seawater immersion, pressure cycling and hydrolysis resistance per NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification
Oil, drilling mud & abrasion resistance: Resistant to marine hydraulic oils, salt mist, winch sheave wear and seabed abrasion per NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification
Environmental & test standards: IEC 60228 / IEC 60794 / ITU-T G.972 / IEEE 1580 / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: QFCU NEK 606 FO
Sheath colour & metre marking: Continuous metre-marked black outer finish (SHF2 Oil & Mud-R)
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard QFCU NEK 606 FO subsea & offshore configurations

Manufactured to NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification for subsea, oceanographic, ROV, seismic and offshore applications.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Breaking / tensile kN ≈	Min. bend R mm
QFCU NEK 606 FO Construction Schedule (−40…+90 °C)
QFCU NEK 606 FO 4–12F EOM/Sub	4–12 × ITU-T G.652D / G.654E SM (+ Power)	Laser-welded SS FIMT + Steel/Aramid Armour	8.2	260	48.0	125
QFCU NEK 606 FO 24–48F EOM/Sub	24–48 × ITU-T G.652D / G.654E SM (+ Power)	Laser-welded SS FIMT + Contra-Helical Steel	17.5	680	120.0	260
QFCU NEK 606 FO 96–192F Trunk	96–192 × ITU-T G.654E / G.652D Submarine	SS Tube + Steel Vault + Cu Tube + DA Armour	28.0	1,650	300.0	420

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom core cross-sections, pair/fibre counts, armour breaking loads and continuous winch/seabed lengths available per NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
4–12 × ITU-T G.652D / G.654E SM (+ Power)	0.35	≤0.35 dB/km @ 1310 nm	−40…+90 °C
24–48 × ITU-T G.652D / G.654E SM (+ Power)	0.21	≤0.21 dB/km @ 1550 nm	−40…+90 °C
96–192 × ITU-T G.654E / G.652D Submarine	0.18	≤0.18 dB/km @ 1550 nm	−40…+90 °C

Every production length undergoes routine conductor DC resistance, high-voltage dielectric or OTDR continuity and dimensional verification.

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.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
Conductor resistance, optical OTDR continuity & dimensional verification (NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification)	DC resistance at 20 °C / optical attenuation and outer diameter within NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification)	Zero dielectric breakdown and verified insulation resistance for Optical rating	Every manufactured drum length
Sample tests
Hydrostatic pressure, tensile breaking load & water-blocking qualification (NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification)	Verified subsea pressure integrity, torque-balanced tensile performance and thermal stability across −40…+90 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

NEK TS 606 / IEC 60331-25 CompliantEN 10204 3.1 Factory Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX QFCU NEK 606 FO NEK TS 606 / IEC 60331-25 Optical CE

Delivery form: Heavy-duty export fumigated wooden drums, steel oceanographic winch reels or submarine turntables
Standard lengths: 500 m, 1,000 m, 3,000 m, 6,000 m or custom continuous subsea lengths
MOQ: 100 m (standard configurations) · 500 m (custom subsea builds)
Lead time: 2–6 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFQFCU 4–48F NEK TS 606 & IEC 60331-25 Fire- & Mud-Resistant Steel-Braid – technical datasheet3 sizes · construction, technical data, approvals XLSXQFCU NEK 606 FO spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-26
Updated: 2026-10-26

FAQ

Questions engineers ask first

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

What governing standard and construction define QFCU NEK 606 FO (QFCU 4–48F NEK TS 606 & IEC 60331-25 Fire- & Mud-Resistant Steel-Braid Armoured Marine FO Cable)?

QFCU NEK 606 FO (QFCU 4–48F NEK TS 606 & IEC 60331-25 Fire- & Mud-Resistant Steel-Braid Armoured Marine FO Cable) is manufactured in accordance with NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification for Optical service over -40 to +90 °C. Its 4-layer construction comprises mica-protected gel-filled loose tubes (4–48f), lszh inner bedding sheath and shf2 oil & mud-resistant outer sheath.

What is the minimum bending radius and operating temperature range for QFCU NEK 606 FO?

The minimum bending radius for QFCU NEK 606 FO is 12 × OD across its continuous operating temperature range of -40 to +90 °C, ensuring mechanical, hydrostatic and dielectric reliability in subsea and offshore service.

How are the concentric layers of QFCU NEK 606 FO arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Mica-Protected Gel-Filled Loose Tubes (4–48F) — PBT loose tubes wrapped with fire-resistant mica tape (IEC 60331-25); (02) LSZH Inner Bedding Sheath — Halogen-free flame-retardant inner protective jacket; (03) Galvanized Steel Wire Braid (GSWB) — High-coverage galvanized steel wire braid armour; (04) SHF2 Oil & Mud-Resistant Outer Sheath — Cross-linked low-smoke zero-halogen SHF2 offshore jacket.

What factory test certificates are supplied with QFCU NEK 606 FO?

Every production drum of QFCU NEK 606 FO undergoes routine conductor resistance/OTDR continuity, high-voltage dielectric and dimensional testing per NEK TS 606 QFCU SHF2-MUD & IEC 60331-25 Fire-Resistant Armoured Offshore Optical Specification, and is delivered with an EN 10204 3.1 factory test certificate.

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01Selected sizes

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02Reel & motion

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03Message for our engineers

QFCU 4–48F NEK TS 606 & IEC 60331-25 Fire- & Mud-Resistant Steel-Braid Armoured Marine FO Cable

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