{"id":1232,"date":"2026-06-29T03:05:23","date_gmt":"2026-06-29T03:05:23","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?p=1232"},"modified":"2026-06-29T03:05:23","modified_gmt":"2026-06-29T03:05:23","slug":"winch-drive-planetary-gearbox-for-offshore-platform","status":"publish","type":"post","link":"https:\/\/planetary-gearboxes.com\/ja\/winch-drive-planetary-gearbox-for-offshore-platform\/","title":{"rendered":"Winch Drive Planetary Gearbox for Offshore Platform"},"content":{"rendered":"
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<\/p>\n

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Winch Drive Series \u2014 Marine & Offshore Equipment<\/p>\n

Winch Drive Planetary Gearbox for Offshore Platform<\/h1>\n

Fixed steel jackets, semi-submersible production platforms, tension-leg platforms, and FPSOs all rely on winch systems for platform crane operations, drilling equipment handling, pipe and riser management, and emergency escape and rescue. Every winch on an offshore production platform carries an additional requirement that no commercial vessel winch faces: the drive gearbox must operate safely in a potentially explosive atmosphere where hydrocarbon gas can be present at any time, requiring ATEX-rated design that covers not just the motor but the gearbox housing, seals, and lubricant specification.<\/p>\n

500 \u2013 50,000 Nm output torque<\/span>
\nATEX Zone 1 \/ Zone 2 rated<\/span>
\nIP68 offshore marine seal<\/span>
\nAPI \/ NORSOK \/ DNV compliant<\/span><\/div>\n<\/div>\n

<\/p>\n

Offshore production platforms \u2014 whether fixed steel jacket structures in shallow water, semi-submersibles in water depths to 3,000 metres, or FPSOs moored on deepwater fields \u2014 operate in a regulatory and safety environment that imposes requirements on mechanical equipment far beyond those of any other marine application. The winch drive planetary gearbox<\/a> on an offshore platform must simultaneously satisfy the mechanical performance requirements of a marine-grade lifting drive, the explosion protection requirements of IEC 60079 for equipment in hazardous areas, and the functional safety requirements of API RP 2D and NORSOK R-002 for offshore crane and lifting equipment. Korea Ever-Power supplies planetary winch drive gearboxes qualified for offshore platform service across the full application spectrum \u2014 from light utility crane auxiliary winches through heavy-duty drilling equipment handling winches on jackup and semi-submersible drilling rigs \u2014 with ATEX Zone 1 and Zone 2 certification, IP68 sealing, and fire-resistant hydraulic fluid compatibility as standard platform specifications.<\/p>\n

<\/p>\n

Offshore Platform Winch Applications and Drive Requirements<\/h2>\n

<\/p>\n

\"Offshore<\/div>\n

Platform Crane Main and Auxiliary Hoist (3,000\u201350,000 Nm):<\/strong> Every offshore platform carries at least one pedestal crane for supply vessel offloading, equipment installation, and maintenance lifting. Platform cranes range from 10-tonne capacity utility cranes on small unmanned platforms to 800-tonne capacity heavy-lift cranes on large production platforms and FPSO vessels. The main hoist winch gearbox must transmit the full rated hook load torque under continuous offshore crane duty \u2014 defined in API RP 2D as 25% of rated load at maximum speed, 100% of rated load at reduced speed, and 125% of rated load as a proof load test at no speed. The gearbox must hold this proof load statically with the holding brake engaged and the motor de-energised, without any movement, for the duration specified by the certifying authority.<\/p>\n

Drilling Equipment Handling Winches (5,000\u201340,000 Nm):<\/strong> Jackup drilling rigs and semi-submersible drilling rigs use a range of winches beyond the main drawworks and travelling block \u2014 including the mousehole winch that lifts drill string sections during connection, the catwalk winch that moves pipe from the pipe rack to the rotary table area, and the riser handling winch that controls the deployment and retrieval of marine risers between the drilling vessel and the seabed wellhead. These winches operate within the drilling derrick structure \u2014 a Zone 1 ATEX area due to the proximity to wellhead hydrocarbon releases \u2014 requiring ATEX-certified gearboxes throughout.<\/p>\n

Mooring and Anchor Handling Winches on FPSOs (8,000\u201350,000 Nm):<\/strong> FPSOs (floating production, storage, and offloading vessels) use chain or wire mooring systems to maintain station over the subsea production wells they serve. The mooring winches \u2014 or chain jacks \u2014 that tension the mooring lines must occasionally be operated for line adjustment during platform life, typically once every few years during mooring inspection campaigns. The low operation frequency does not reduce the ATEX or IP68 requirement: the gearbox must be ready to operate correctly after years of idle storage in the marine environment, requiring a lubricant and seal specification that maintains adequate protection during extended non-operation periods as well as during active service.<\/p>\n

<\/p>\n

ATEX Hazardous Area Requirements for Platform Winch Gearboxes<\/h2>\n

<\/p>\n

\"Winch<\/div>\n

IEC 60079 and the ATEX Directive divide offshore platform deck areas into hazardous zones based on the likelihood and duration of explosive gas atmosphere presence. Platform cranes and most winch equipment sit in Zone 1 (explosive atmosphere likely during normal operation) or Zone 2 (explosive atmosphere possible but not likely during normal operation). Each zone classification imposes specific equipment design requirements that go beyond what a standard marine-grade gearbox provides:<\/p>\n

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\ud83d\udd25<\/span><\/p>\n

Surface Temperature \u2014 T4 Class<\/h3>\n<\/div>\n

In Zone 1 and Zone 2 areas, the external surface temperature of any equipment must remain below the ignition temperature of the surrounding gas mixture at all times, including during gearbox overload events. For the hydrocarbon gas mixtures present on production platforms, the applicable temperature class is T4 \u2014 maximum surface temperature 135\u00b0C. Korea Ever-Power offshore platform winch gearboxes are thermally designed so that the maximum external surface temperature at 110% of rated torque and maximum ambient temperature (45\u00b0C) does not exceed 120\u00b0C, providing a 15\u00b0C margin below the T4 limit.<\/p>\n<\/div>\n

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\ud83d\udd0c<\/span><\/p>\n

Stainless Flame Arrester Breather<\/h3>\n<\/div>\n

The gearbox housing breather is a potential ignition path \u2014 if the internal oil mist ignites during an internal fault, the flame must not propagate to the external atmosphere through the breather opening. Korea Ever-Power ATEX-rated gearboxes are fitted with a stainless steel 316L sintered flame arrester on the breather outlet, rated to IEC 60079-1 for Group IIA gases (propane group) as the standard specification, with Group IIB (ethylene group) available for platforms processing ethylene-rich streams. The flame arrester is integrated with the desiccant breather assembly as a single replaceable unit.<\/p>\n<\/div>\n

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\u2693<\/span><\/p>\n

Non-Sparking External Materials<\/h3>\n<\/div>\n

In Zone 1 areas, impact between metal surfaces can generate sparks capable of igniting a surrounding gas mixture. External components that could be struck during normal operation \u2014 the drain plug, fill plug, breather assembly, and inspection cover \u2014 are manufactured from non-sparking aluminium bronze or stainless steel 316L rather than carbon steel. External fasteners are A4 stainless steel. The gearbox housing exterior paint is an anti-static formulation with surface resistivity below 10 G\u03a9 per EN 13463-1, preventing electrostatic charge accumulation on the housing surface.<\/p>\n<\/div>\n

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\ud83d\udca7<\/span><\/p>\n

Fire-Resistant Hydraulic Fluid Compatibility<\/h3>\n<\/div>\n

Offshore platform hydraulic systems frequently use fire-resistant hydraulic fluids \u2014 HFDU (polyol ester synthetic), HFDR (phosphate ester), or HFC (water-glycol) \u2014 instead of mineral oil to reduce fire risk from hydraulic line rupture near ignition sources. The SAHR brake release circuit of the winch gearbox contacts the platform hydraulic fluid directly. Korea Ever-Power offshore platform gearboxes use stainless steel 316L internal hydraulic circuits, PTFE-lined hose connections, and FKM O-ring seals throughout the brake release system \u2014 compatible with all three fire-resistant fluid types without the compatibility failures that occur when standard NBR seals contact phosphate ester fluids.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Korea Ever-Power Offshore Platform Winch Drive Selection Guide<\/h2>\n

<\/p>\n

\"ZL55<\/p>\n

Korea Ever-Power winch drive gearboxes for offshore platform applications cover the full range from compact ZL55 units on platform utility cranes and personnel basket winches through the 419W3 heavy units on platform crane main hoists and FPSO mooring winches. All platform-specified units are supplied with ATEX Zone 1 certification (IEC Ex and ATEX Directive 2014\/34\/EU), IP68 FKM sealing, stainless steel flame arrester breather, fire-resistant hydraulic fluid compatible brake release circuit, and C5-M marine corrosion protection as part of the baseline platform specification \u2014 not as optional extras.<\/p>\n

The two-digit temperature class (T4, surface limit 135\u00b0C) and gas group (IIA standard, IIB available) are specified at order placement based on the platform area classification drawing provided by the customer or the ATEX area classification study for the installation.<\/p>\n

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<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
\u30e2\u30c7\u30eb<\/th>\n\u51fa\u529b\u30c8\u30eb\u30af<\/th>\n\u30b9\u30c6\u30fc\u30b8<\/th>\n\u6bd4\u7387\u7bc4\u56f2<\/th>\nPlatform Application<\/th>\nATEX Class<\/th>\n\u30b7\u30fc\u30eb<\/th>\n<\/tr>\n<\/thead>\n
ZL55<\/td>\n500 \u2013 2,000 Nm<\/td>\n1\u20135<\/td>\n3.7 \u2013 3,497<\/td>\nUtility crane, personnel basket<\/td>\nZone 2 \/ T4<\/td>\nIP67 FKM<\/td>\n<\/tr>\n
ZR75<\/td>\n1,500 \u2013 6,000 Nm<\/td>\n2\u20135<\/td>\n5.1 \u2013 4,884<\/td>\nPlatform crane auxiliary hoist<\/td>\nZone 1 \/ T4<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
407AW<\/td>\n3,000 \u2013 10,000 Nm<\/td>\n2\u20133<\/td>\n50 \u2013 1,200<\/td>\nDrilling rig pipe handling, mousehole<\/td>\nZone 1 \/ T4<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
414W3<\/td>\n8,000 \u2013 22,000 Nm<\/td>\n3<\/td>\n100 \u2013 2,500<\/td>\nPlatform crane main hoist, riser handling<\/td>\nZone 1 \/ T4<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
417W3<\/td>\n15,000 \u2013 35,000 Nm<\/td>\n3<\/td>\n100 \u2013 2,500<\/td>\nHeavy crane main hoist, FPSO mooring<\/td>\nZone 1 \/ T4<\/td>\nIP68 FKM<\/td>\n<\/tr>\n
419W3<\/td>\n25,000 \u2013 50,000 Nm<\/td>\n3\u20134<\/td>\n200 \u2013 5,000<\/td>\n800-tonne platform crane, deepwater mooring<\/td>\nZone 1 \/ T4<\/td>\nIP68 FKM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

API RP 2D and NORSOK R-002: Design Standards for Platform Crane Winch Drives<\/h2>\n

<\/p>\n

\"419W3<\/p>\n

API RP 2D (Recommended Practice for Operation and Maintenance of Offshore Cranes) and NORSOK R-002 (Lifting Equipment) define the design and performance requirements for offshore crane winch systems that go substantially beyond the structural requirements of commercial marine crane standards. Korea Ever-Power platforms winch drive gearboxes are designed to comply with these requirements as the baseline engineering standard:<\/p>\n

Design Factor and Proof Load:<\/strong> API RP 2D requires that the winch gearbox be rated for a minimum design factor of 1.5 on the maximum rated line pull \u2014 meaning the gearbox static strength must support 1.5 times the rated line pull without permanent deformation of any gear or shaft component. For a proof load test requirement of 125% of rated load (per API RP 2C for offshore pedestal cranes), the combined load on the gearbox during proof testing reaches 125% of rated line pull, which the gearbox must hold statically with the brake engaged without shaft deflection exceeding the limits that would affect gear tooth contact. Korea Ever-Power platform crane winch gearboxes are designed to the API 1.5 design factor on all critical load-carrying components.<\/p>\n

Brake Holding Under Dynamic Load:<\/strong> NORSOK R-002 requires the winch brake to hold the rated load for a minimum of 10 minutes without load movement under a dynamic load factor of 1.3 times static load \u2014 accounting for the dynamic amplification of wave-induced vessel motion. The brake holding torque calculation must therefore use 1.3 times the static line pull as the brake design load, not the static rated load. Korea Ever-Power SAHR brake packages for offshore platform cranes are sized against this 1.3 dynamic factor as standard, without requiring special order specification from the customer.<\/p>\n

Two Independent Brakes:<\/strong> API RP 2D requires two independently-acting brakes on offshore crane main hoist winches \u2014 primary and secondary \u2014 each capable of holding the rated load independently. Korea Ever-Power satisfies this requirement by integrating the primary SAHR brake within the planetary gearbox housing (on the high-speed input side) and providing a secondary external band brake or disc brake mounting flange on the winch drum side of the gearbox output. The secondary brake is supplied and installed by the crane manufacturer, but the gearbox output flange geometry is designed to the secondary brake specification provided by the crane manufacturer from the project engineering package.<\/p>\n

Emergency Lowering (ELO):<\/strong> Offshore crane regulations require provision for controlled emergency lowering of the load in the event of complete power failure \u2014 a requirement that is unique to offshore platforms where personnel may be suspended in a personnel transfer basket when power is lost. Korea Ever-Power platform crane winch gearboxes include an emergency lowering oil circuit connection on the SAHR brake hydraulic release port, sized to allow a gravity-fed oil reservoir to supply the brake release pressure needed for controlled lowering at a speed regulated by the secondary band brake.<\/p>\n

<\/div>\n<\/div>\n

<\/p>\n

Drilling Rig Winch Drives: Derrick Zone 1 and High-Cycle Pipe Handling<\/h2>\n

<\/p>\n

\"414W3<\/p>\n

The drilling derrick on a jackup or semi-submersible drilling rig is classified Zone 1 throughout its operational envelope \u2014 from the rotary table level to the crown block at the top of the derrick \u2014 because hydrocarbon gas can be present at the wellhead at any point during drilling operations. Every powered component within this zone, including all pipe-handling winches, must carry Zone 1 ATEX certification.<\/p>\n

Mousehole and Rathole Winches:<\/strong> The mousehole winch lifts individual drill pipe joints from horizontal storage to vertical orientation for connection to the drill string at the rotary table \u2014 executing 30 to 50 connection cycles per hour during tripping operations. This is among the highest-cycle offshore winch applications, and the gearbox holding brake, input shaft seal, and planet bearing lubrication must be rated for this cycle intensity. Korea Ever-Power drilling rig winch gearboxes for mousehole duty are rated for 100,000 brake cycles between disc pack inspection intervals \u2014 the same sintered metal disc specification used for high-cycle tugger winch duty, applied here in the more demanding Zone 1 ATEX drilling environment.<\/p>\n

Iron Roughneck and Top Drive Auxiliary Winches:<\/strong> Modern drilling rigs use iron roughneck machines (automated pipe tong systems) and top drive systems that require auxiliary winch drives for positioning and stab-in operations. These winches operate at low loads but require very precise positioning \u2014 the iron roughneck must be positioned to within \u00b120 mm of the drill string centreline for the tong to engage correctly. Korea Ever-Power provides low-backlash planetary gearboxes for these positioning applications, with the sub-8 arcminute backlash specification that ensures the positioning accuracy required for reliable iron roughneck engagement without manual adjustment.<\/p>\n

Riser Handling Gantry Winches:<\/strong> The marine riser that connects the drilling vessel to the subsea blowout preventer is handled by a gantry crane system on the main deck \u2014 typically outside the Zone 1 boundary of the derrick but still within Zone 2 due to proximity to riser joints that may carry drilling fluid residue. Riser handling winches operate at 5 to 10 m\/min speed with line pulls of 30 to 80 kN per wire, with the gearbox required to hold each riser joint stationary during the manual connection procedure. Korea Ever-Power Zone 2 gearboxes for riser gantry duty use the same FKM floating face seal and marine corrosion protection as Zone 1 units, with a simplified SAER brake configuration in place of the Zone 1 hydraulic release system where the platform electrical system is the preferred release medium.<\/p>\n

<\/div>\n<\/div>\n

<\/p>\n

FPSO Mooring and Riser Pull-in Winches: Long-Term Reliability in Unmanned Operation<\/h2>\n

<\/p>\n

\"Winch<\/div>\n

FPSOs are moored on location for periods of 5 to 25 years between dry-dock intervals, and the mooring winch or chain jack equipment that maintains their station may be operated only once every 3 to 5 years for mooring line inspection and adjustment. This operating profile \u2014 very infrequent operation after years of static exposure \u2014 imposes a unique preservation requirement on the winch drive gearbox that differs from any other application in the Korea Ever-Power product range.<\/p>\n

Long-Term Lubricant Stability:<\/strong> A fully synthetic gear oil that provides excellent viscosity-temperature characteristics during active operation may separate, oxidise, or develop corrosion inhibitor depletion during 5 years of static storage in a tropical marine environment. Korea Ever-Power FPSO mooring winch gearboxes are filled as standard with a long-term storage-capable synthetic gear oil formulated with enhanced oxidation inhibitors and rust preventive additives \u2014 providing corrosion protection to DIN 51 360-2 standard during static storage periods and full rated lubrication immediately upon the first post-storage operation without requiring an oil change before the mooring winch is used.<\/p>\n

Flexible Riser Pull-in Winches:<\/strong> During FPSO first oil commissioning, flexible risers and umbilicals connecting the FPSO to the subsea production manifold must be pulled in through the FPSO hull turret or I-tube and connected to the topside process equipment. The pull-in winch executes this operation once at commissioning \u2014 a single high-load, low-speed operation where the line pull may be 50 to 200 kN and the wire speed is 1 to 3 m\/min. The winch drive gearbox must be capable of this full-rated operation immediately after up to 12 months of installation in the marine environment without pre-commissioning oil changes or test runs. Korea Ever-Power FPSO pull-in winch gearboxes undergo a full factory test, are filled with the long-term storage oil grade, and are sealed with tamper-evident caps on all connections \u2014 providing confidence that the gearbox will perform correctly at first commissioning operation.<\/p>\n

Cathodic Protection Compatibility:<\/strong> FPSOs and fixed offshore platforms use impressed current cathodic protection (ICCP) systems to protect the hull and structural steel from seawater corrosion. The DC current flowing through the platform structure can cause stray current corrosion of gearbox housings and output shaft components if the gearbox is not electrically isolated from the platform structure. Korea Ever-Power FPSO and platform-mounted winch gearboxes include an electrically insulating flange at the gearbox-to-winch-frame mounting interface, with resistance above 1 M\u03a9 verified during factory acceptance testing, preventing stray current paths from affecting the gearbox components.<\/p>\n

<\/p>\n

Testing, Certification, and Third-Party Verification<\/h2>\n

<\/p>\n

\"Korea<\/div>\n

Offshore platform winch gearboxes require a more extensive certification and testing process than commercial marine winch drives, involving both the gearbox manufacturer and external certification bodies:<\/p>\n

\n
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\u2460 ATEX Type Examination<\/p>\n

IEC Ex\/ATEX type examination by a notified body (SGS, Bureau Veritas, TUV) verifying the gearbox design meets IEC 60079-0 general requirements and the applicable protection concept standard. The type examination certificate covers the specific model, rating, and hazardous area zone classification.<\/p>\n<\/div>\n

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\u2461 API RP 2D Load Test<\/p>\n

Proof load test at 125% rated line pull with brake engaged, witnessed by the certifying authority (DNV, ABS, Lloyd Register, or independent inspection). Zero load movement required over 10-minute hold. Complete test report provided with shipment.<\/p>\n<\/div>\n

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\u2462 Surface Temperature Measurement<\/p>\n

Gearbox run at 110% rated torque until thermal equilibrium at maximum ambient temperature. External surface temperature mapped by IR thermometer at 12 points on the housing. Maximum recorded temperature documented and compared to T4 limit of 135\u00b0C.<\/p>\n<\/div>\n

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\u2463 IP68 Pressure Test<\/p>\n

All offshore platform units individually pressure tested \u2014 not batch sampling \u2014 at 0.15 bar for 60 minutes in water bath. Zero ingress required. Test record forms part of the permanent equipment dossier submitted to the certifying authority.<\/p>\n<\/div>\n

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\u2464 Stray Current Isolation<\/p>\n

Insulation resistance measured across the mounting flange isolation interface using a 500V DC megohmmeter. Minimum 1 M\u03a9 required. Result recorded in test documentation. Relevant for FPSO and platform-mounted units subject to cathodic protection stray current.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Manufacturing Standards for Offshore Platform Service<\/h2>\n

<\/p>\n

\"Korea<\/div>\n

<\/p>\n

\"Planetary<\/p>\n

Korea Ever-Power offshore platform winch drive gearboxes are manufactured to a higher specification standard than the commercial marine winch drive range, reflecting the safety-critical nature of the ATEX and API-regulated applications they serve:<\/p>\n

Material Traceability:<\/strong> All load-bearing components \u2014 gears, shafts, planet carriers, and housing \u2014 carry full material traceability to mill certificate level, with heat number and chemical composition documented against each component serial number. This traceability satisfies the material certification requirements of API Specification 2C (Offshore Pedestal Mounted Cranes) and NORSOK R-002 for structural components in offshore lifting equipment.<\/p>\n

NDE Inspection of Critical Components:<\/strong> Planet carrier arms, output shaft flanges, and ring gear housings for platform crane main hoist applications undergo magnetic particle inspection (MPI) after final machining, verifying freedom from surface-breaking discontinuities that would reduce the fatigue life below the design target. MPI reports are included in the material certification package shipped with each unit.<\/p>\n

Gear Accuracy Certification:<\/strong> Each gear set is measured on a coordinate measuring machine or dedicated gear measuring centre after grinding, producing a numerical accuracy report showing profile error, lead error, and pitch error at multiple measurement points around the gear circumference. This report is included in the shipment documentation and referenced in the ATEX type examination file, confirming that the as-built gear geometry matches the type-examined design.<\/p>\n

<\/div>\n<\/div>\n

<\/p>\n

Common Platform Winch Gearbox Failures and Prevention<\/h2>\n

<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Failure Mode<\/th>\nRoot Cause<\/th>\nDetection<\/th>\nPrevention<\/th>\n<\/tr>\n<\/thead>\n
ATEX seal degradation<\/td>\nPhosphate ester hydraulic fluid contact with NBR seals in brake circuit \u2014 swelling and leakage within 6 months of service<\/td>\nBrake release circuit fluid leak; sluggish brake response; brake failure to release fully<\/td>\nSpecify FKM seals and PTFE-lined hose throughout brake release circuit for all fire-resistant fluid platforms<\/td>\n<\/tr>\n
Stray current corrosion<\/td>\nICCP current flowing through gearbox housing \u2014 galvanic pitting of output shaft and housing bore surfaces<\/td>\nPitting corrosion on output shaft and adjacent housing bore at annual inspection; reduced insulation resistance at mounting flange<\/td>\nVerify insulation resistance at mounting flange annually; replace insulating flange if resistance falls below 100 k\u03a9<\/td>\n<\/tr>\n
Lubricant degradation in storage<\/td>\nStandard mineral oil oxidising and developing corrosion inhibitor depletion during multi-year FPSO storage between mooring operations<\/td>\nCorrosion on gear and bearing surfaces found at first post-storage inspection; viscosity out of specification in oil sample<\/td>\nSpecify long-term storage synthetic oil at commissioning; conduct annual oil sample check even during non-operation periods<\/td>\n<\/tr>\n
Brake dragging under API dynamic load<\/td>\nBrake sized to static rated load only \u2014 insufficient holding torque when API 1.3 dynamic factor is applied during wave-induced vessel motion<\/td>\nChain slippage during load hold in moderate sea state; brake disc overheating from continuous slip<\/td>\nSize brake to 1.3 x static rated load as per NORSOK R-002; verify at proof load test with dynamic load factor applied<\/td>\n<\/tr>\n
ELO circuit blockage<\/td>\nEmergency lowering oil reservoir valve corroded shut \u2014 gearbox brake cannot be released for emergency lowering<\/td>\nELO function test failure at annual crane inspection; valve impossible to operate manually<\/td>\nAnnual ELO function test with load suspended; use stainless steel valve and reservoir with annual corrosion inspection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Why Offshore Platform Designers and Operators Choose Korea Ever-Power<\/h2>\n

<\/p>\n

\"Korea<\/div>\n

<\/p>\n

\"Korea<\/p>\n
\n
\n

IECEx<\/p>\n

ATEX type examination certification by accredited notified body \u2014 Zone 1 and Zone 2 ratings available, T4 temperature class standard<\/p>\n<\/div>\n

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API 1.5x<\/p>\n

Design factor on all structural components \u2014 125% proof load compliance per API RP 2C, with dynamic brake sizing per NORSOK R-002<\/p>\n<\/div>\n

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1 M\u03a9<\/p>\n

Cathodic protection isolation at mounting flange \u2014 preventing ICCP stray current corrosion on FPSO and platform installations<\/p>\n<\/div>\n

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MPI<\/p>\n

Magnetic particle inspection of critical components with full material traceability \u2014 satisfying API Spec 2C and NORSOK R-002 documentation requirements<\/p>\n<\/div>\n<\/div>\n

Korea Ever-Power works with platform crane manufacturers, EPCI contractors, and offshore operators from the earliest project specification stage, providing ATEX type examination certificates, material data sheets, dimensional drawings, and test procedure proposals that support the project documentation requirements of all major classification societies and flag state authorities. Contact our application engineering team with your platform area classification drawing and crane specification for a free ATEX compliance review and winch drive sizing proposal.<\/p>\n

<\/div>\n<\/div>\n

<\/p>\n

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Source Your Offshore Platform Winch Drive Planetary Gearbox<\/h2>\n

Whether you are specifying winch drives for a new offshore platform or drilling rig build, sourcing replacement gearboxes for platform crane certification renewal, or upgrading existing winches to meet current ATEX and API requirements \u2014 Korea Ever-Power delivers ATEX-certified, API-compliant planetary winch drive gearboxes built for the full offshore platform service life. Send us your area classification zone, rated line pull, motor type, and applicable standards for a free compliance review, gearbox sizing, and documentation package proposal within 48 hours.<\/p>\n

\ud83d\udcd1 View Winch Drive Range<\/a>
\n\ud83d\udcde Request Application Review<\/a><\/div>\n<\/div>\n

Edit by Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Winch Drive Series \u2014 Marine & Offshore Equipment Winch Drive Planetary Gearbox for Offshore Platform Fixed steel jackets, semi-submersible production platforms, tension-leg platforms, and FPSOs all rely on winch systems for platform crane operations, drilling equipment handling, pipe and riser management, and emergency escape and rescue. Every winch on an offshore production platform carries an additional requirement that no commercial vessel winch faces: the drive gearbox must operate safely in a potentially explosive atmosphere where hydrocarbon gas can be present at any time, requiring ATEX-rated design that covers not just the motor but the gearbox housing, seals, and lubricant specification. 500 \u2013 50,000 Nm output torque ATEX Zone 1 \/ […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[965],"tags":[],"class_list":["post-1232","post","type-post","status-publish","format-standard","hentry","category-application-and-technical-guid"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts\/1232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/comments?post=1232"}],"version-history":[{"count":2,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts\/1232\/revisions"}],"predecessor-version":[{"id":1236,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/posts\/1232\/revisions\/1236"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/media?parent=1232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/categories?post=1232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/tags?post=1232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}