Overview: Underwater Excavator for Global Markets

INDUSTRIAL SPECIFICATION REPORT 2026: EXECUTIVE OVERVIEW

Product: SEA LION Amphibious Excavator Series (Refurbished & New Deployment Models)
Target Audience: Fleet Managers, Construction & Mining Operations Directors

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1. PURPOSE & CORE APPLICATION

This report details the operational specifications and strategic deployment rationale for SEA LION International’s certified amphibious excavator platform, engineered for sub-aquatic earthmoving, dredging, and shoreline stabilization in mining, logistics infrastructure, and heavy civil construction. Unlike standard excavators, this platform operates at depths up to 5m with integrated corrosion-resistant hydraulics, sealed undercarriages, and dynamically stabilized buoyancy control. Primary applications include:
– Mining: Underwater overburden removal in alluvial diamond/gold operations (Africa), reservoir sediment management (Southeast Asia).
– Logistics: Port channel deepening, submerged pipeline trenching, and flood-resilient cargo terminal construction.
– Construction: Coastal erosion control, bridge foundation preparation in floodplains, and marshland infrastructure development.

Note: SEA LION utilizes terminology “amphibious excavator” per industry standards; “underwater excavator” denotes operational capability, not a distinct product class. All units are derived from XCMG/SINOTRUK heavy-duty chassis with marine-grade modifications.

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2. REGIONAL PREFERENCE DRIVERS: AFRICA, RUSSIA, SOUTHEAST ASIA

Field data (2023–2025) confirms 72% higher deployment rates in target regions versus global averages. Key drivers are operational resilience under region-specific constraints:

Region	Key Operational Demands	SEA LION Model Adaptations	Impact on ROI
Africa	Extreme dust, remote sites, fuel variability, high corrosion	Sealed hydraulic systems, multi-fuel engine calibration (diesel/kerosene), reinforced undercarriage plating	40% reduction in unscheduled maintenance vs. non-adapted units
Russia	Permafrost instability, sub-zero operation (-40°C), short working seasons	Arctic-grade lubricants, heated hydraulic reservoirs, reinforced track links for ice traction	22% extended operational window in seasonal projects
Southeast Asia	Monsoon flooding, high humidity, saline exposure, soft soil	Marine-grade stainless steel components, enhanced buoyancy control, deep-water sealing protocols	35% faster project completion in flood-prone zones

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3. SEA LION VALUE PROPOSITION FOR FLEET OPERATIONS

SEA LION’s 18-year expertise in heavy equipment lifecycle management directly addresses regional pain points:

• Refurbishment Rigor: All refurbished units undergo ISO 9001-certified processes, including ultrasonic weld testing of submerged structural joints and hydraulic pressure validation to 1.5x operational specs. Residual life of critical components (booms, buckets) exceeds 8,000 hours.
• Supply Chain Resilience: Dedicated spare parts hubs in Durban (Africa), Vladivostok (Russia), and Singapore (SEA) ensure <72-hour delivery of marine-specific components (seals, corrosion kits, buoyancy modules).
• Logistics Optimization: RO-RO vessel deployment for rapid mobilization to remote coastal sites; containerized modular assembly reduces port congestion delays by 30%.
• Transparency Protocol: Full digital twin integration tracks refurbishment history, component lifespans, and real-time operational health via SEA LION’s FleetSync™ platform.

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4. CONCLUSION

The SEA LION amphibious excavator platform is the preferred solution in Africa, Russia, and Southeast Asia due to proven adaptability to extreme environmental stressors and integrated lifecycle support infrastructure. Its deployment directly mitigates project delays caused by site-specific hydrological challenges while reducing total cost of ownership through SEA LION’s certified refurbishment standards and regional parts availability. For fleet managers, this translates to quantifiable uptime gains (validated at 89% in 2025 field audits) and de-risked project execution in high-consequence environments.

SEA LION International prioritizes equipment longevity over transactional sales, ensuring partners achieve sustained operational efficiency through engineering integrity and supply chain certainty.

Technical Specifications & Parameters

Industrial Specification Report 2026

Prepared for Fleet Managers & Construction Companies
Equipment: Underwater Excavator – Model UX-260WE

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Technical Specifications

Parameter	Specification
Engine Model	Weichai WD615 (Marine-Grade Sealed Variant)
Engine Configuration	6-Cylinder, Turbocharged, Intercooled Diesel
Horsepower (HP)	260 HP @ 2,200 rpm
Max Torque	1,100 Nm @ 1,400–1,600 rpm
Transmission	HW19710 10-Speed Manual (Heavy-Duty Wet Clutch)
Gear Range	10 Forward / 2 Reverse
Axle Load (Front/Rear)	6,800 kg / 10,200 kg (Total: 17,000 kg)
Tire Specifications	12.00R20, Radial, Deep-Tread, Cut-Resistant, Marine-Grade Rubber Compound
Tire Load Index	145 / 142 (Single / Dual), 18-Ply Rating
Operating Weight	16,800 kg (Dry), 17,500 kg (Submerged w/ tools)
Underwater Depth Rating	15 meters (Continuous Operation), 20 meters (Intermittent)
Fuel Tank Capacity	320 Liters
Cooling System	Pressurized, Sealed Dual-Circuit (Freshwater + Glycol)
Hydraulic System	3-Stage Load-Sensing, 210 bar Max Pressure
Bucket Capacity	0.85 m³ (Standard Dredge Bucket)
Swing Mechanism	360° Continuous, Hydraulic Rotary Bearing
Corrosion Protection	Cathodic Protection + Epoxy-Coated Chassis

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Fuel Efficiency Performance

The UX-260WE is engineered for optimal fuel economy in submerged and semi-submerged operations. Utilizing the Weichai WD615 engine with advanced electronic fuel injection (EFI) and adaptive load-sensing hydraulics, the excavator achieves:

• Average Fuel Consumption:
• Land Operation: 18.5 L/h at 75% load
• Underwater Operation: 21.0 L/h at 75% load (due to increased hydraulic resistance)
• Fuel Efficiency Index (FEI): 1.38 m³/fuel liter (under standard dredging conditions)
• Auto-Idle & Eco-Mode: Reduces idle consumption by up to 30%
• Regenerative Swing Circuit: Recovers 12–15% of swing energy, improving overall efficiency

Fuel consumption remains stable across temperature ranges from -15°C to +45°C due to integrated thermal management and engine pre-heating systems.

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Load Capacity & Operational Endurance

The UX-260WE is designed for high-capacity underwater excavation, pipeline trenching, and seabed grading. Key load and performance metrics include:

• Maximum Digging Depth: 14.2 meters
• Maximum Reach at Water Surface: 18.5 meters
• Lift Capacity (at 8m radius, surface): 4,200 kg
• Payload Tolerance (Submerged): 3,800 kg (accounting for buoyancy and drag)
• Axle Load Distribution: Optimized to maintain stability on soft substrates and floating platforms
• Tire Performance: 12.00R20 tires provide high flotation and low ground pressure (0.78 MPa), reducing rutting on muddy or marshy terrain

The HW19710 transmission ensures smooth power delivery under variable loads, with reinforced synchronizers for frequent shifting in dredging cycles. Axle load limits are calibrated to comply with ISO 10993-4 structural standards for amphibious machinery.

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Summary

The UX-260WE underwater excavator delivers industrial-grade performance for demanding marine and coastal construction projects. With a 260 HP Weichai WD615 engine, HW19710 transmission, and rugged 12.00R20 tire configuration, it balances high load capacity with measurable fuel efficiency. Its optimized axle load distribution and corrosion-resistant design ensure longevity in saline and abrasive environments, making it a strategic asset for fleet deployment in dredging, harbor maintenance, and offshore foundation work.

Quality Control & Inspection Standards

SEA LION INTERNATIONAL

INDUSTRIAL SPECIFICATION REPORT: MODEL UX-2026 UNDERWATER EXCAVATOR
Document ID: SL-UX2026-MS-001 | Revision: 1.2 | Effective Date: 2026-01-15

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1. EXECUTIVE SUMMARY

SEA LION’s UX-2026 underwater excavator is engineered for 24/7 operation in hyper-saline, high-sediment marine environments. This report details manufacturing quality controls and Pre-Delivery Inspection (PDI) protocols focused on chassis structural integrity and marine-engine durability – critical factors for fleet uptime in dredging, offshore foundation, and coastal infrastructure projects. All specifications exceed ISO 20474-8:2021 (Earth-moving machinery – Underwater excavators) and DNV-RU-SHIP Pt.5 Ch.18 standards.

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2. MANUFACTURING QUALITY: CHASSIS STRENGTH FOR ROUGH TERRAIN

The UX-2026 chassis employs a monocoque hull design with strategic reinforcement zones to withstand dynamic loads during seabed excavation (0-30m depth). Key quality controls:

Component	Material/Process	Quality Control Metric	SEA LION Standard	Industry Baseline
Primary Hull Frame	Marine-grade AL-6082-T6 aluminum alloy	Ultrasonic thickness mapping (per ASTM E797)	±0.5mm tolerance	±1.2mm tolerance
Stress Points	Laser-welded 316L stainless steel inserts	Dye penetrant testing (ASTM E1417)	Zero defects per 10m²	≤2 defects per 10m²
Articulation Joints	Forged HY-100 steel (yield: 890 MPa)	3D coordinate measurement (ASME B89.4.1036)	<0.1° angular deviation	<0.3° deviation
Ballast System	Pressure-tested HDPE compartments (1.5x op. depth)	Hydrostatic test @ 45 bar (ISO 14647)	Zero leakage	5% leakage allowance

Design Validation:
– Finite Element Analysis (FEA) simulates 150% overload scenarios (e.g., rock strike at 5m/s impact velocity).
– Chassis tested to 30% overdesign margin for torsional rigidity (vs. ISO min. 15%).
– Salt-fog resistance: 2,000-hour ASTM B117 test with <0.5% pitting corrosion.

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3. MANUFACTURING QUALITY: ENGINE DURABILITY

The UX-2026 utilizes the proprietary SEA LION MARINECORE™ 8.2L Tier V diesel engine, optimized for continuous submersion and thermal cycling.

System	Durability Feature	Validation Protocol	Performance Metric
Cylinder Block	Centrifugally cast CGI (Compacted Graphite Iron)	Thermal cycle testing (SAE J1090)	15,000 hr life @ 95°C coolant
Cooling System	Dual titanium heat exchangers + sacrificial anodes	500-hr saltwater immersion test	ΔT < 3°C after 1,000 cycles
Fuel System	Corrosion-resistant Inconel 625 injectors	Particle contamination test (ISO 16232)	<5mg debris per 10L fuel
Sealing	Triple-lip ceramic-coated shaft seals	Pressure decay test @ 10 bar (ISO 10685)	<0.01 bar/min leakage

Key Durability Metrics:
– Cold-start reliability: -25°C operational within 8 seconds (verified per ISO 1585).
– Sediment tolerance: Engine validated with 2,500 ppm suspended solids (exceeds ISO 19438 by 2.5x).
– Predictive maintenance: IoT sensors monitor bearing wear (vibration < 2.8 mm/s RMS) and coolant pH in real-time.

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4. PRE-DELIVERY INSPECTION (PDI) PROTOCOLS

All UX-2026 units undergo 72-hour simulated operational PDI at SEA LION’s Marine Validation Basin (MVB). Critical checks for fleet readiness:

4.1 Chassis Structural Verification

PDI Step	Method	Acceptance Criteria	Duration
Dynamic Load Simulation	10,000-cycle articulation under 120% max load	No plastic deformation (laser scan verified)	16 hours
Pressure Integrity Test	Submersion @ 35m depth for 4 hours	0 pressure loss (ISO 13628-5)	4 hours
Corrosion Protection Audit	Anode consumption measurement + coating adhesion	Anodes >80% intact; coating >5 MPa pull-off	2 hours

4.2 Engine & Powertrain Validation

PDI Step	Method	Acceptance Criteria	Duration
Full-Load Endurance Run	24-hour operation @ 95% RPM in saline water	Oil contamination < 15 ppm (ASTM D7647)	24 hours
Thermal Shock Cycle	10 rapid transitions: -20°C to 105°C	No seal failure; <2% power fluctuation	8 hours
Hydraulic Contamination Check	NAS 1638 particle count (system fluid)	Class 6 or better	1 hour

PDI Documentation:
– Digital twin synchronization: All test data uploaded to SEA LION FleetLink™ for predictive maintenance baselining.
– Final sign-off requires 100% pass rate on critical checkpoints (chassis, engine, sealing).

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5. OPERATIONAL IMPACT FOR FLEET MANAGERS

• Chassis longevity: Field data shows 40% reduction in frame repairs vs. competitors in rocky seabed operations (2025 SEA LION fleet survey).
• Engine availability: 9,500-hour mean time between overhauls (MTBO) in continuous dredging – 25% above industry average.
• PDI ROI: Units passing SEA LION’s MVB protocol demonstrate 32% lower unscheduled downtime in first 1,000 operating hours (per 2025 third-party audit).

Conclusion: The UX-2026’s manufacturing rigor and exhaustive PDI ensure operational resilience in extreme underwater conditions. SEA LION’s chassis and engine specifications directly translate to reduced total cost of ownership (TCO) through extended service intervals and minimized corrosion-related failures. All units ship with full PDI certification and digital health baseline for fleet integration.

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SEA LION International | Engineering the Depths
This document contains proprietary technical data. Unauthorized reproduction prohibited.

Shipping & Logistics Solutions

INDUSTRIAL SPECIFICATION REPORT 2026
Prepared for: Fleet Managers & Construction Companies
Subject: Logistics Solutions for Exporting Underwater Excavators from China
Date: January 2026

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1. Executive Summary

This report evaluates three primary maritime shipping methods—Roll-on/Roll-off (RO-RO), Bulk Cargo, and Flat Rack container transport—for the export of underwater excavators from manufacturing hubs in China to global project sites. The analysis focuses on operational efficiency, equipment integrity, cost structure, and corrosion protection measures, with specific emphasis on long-term exposure to marine environments. A recommended best practice for seawater corrosion mitigation—wax spraying—is detailed in Section 5.

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2. Equipment Overview: Underwater Excavator

Parameter	Specification
Weight Range	28,000 – 42,000 kg
Dimensions (L×W×H)	12.5 m × 3.8 m × 4.2 m (avg.)
Operational Environment	Submerged (up to 30 m depth), saline/brackish water
Material Composition	High-tensile steel, marine-grade hydraulics, corrosion-resistant seals
Special Handling	Non-stackable, sensitive hydraulic systems, tracked mobility

Due to size, weight, and sensitivity to environmental exposure, transport method selection critically impacts delivery timelines, cost, and post-arrival operational readiness.

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3. Shipping Method Comparison

Criteria	RO-RO (Roll-on/Roll-off)	Bulk Cargo	Flat Rack Container
Loading Mechanism	Self-propelled or towed onto vessel	Craned/lifted into hold	Craned onto open-frame container
Cargo Securing	Wheel chocks, lashings	Custom cradles, welding to hold structure	Lashing chains, twist locks, timber dunnage
Vessel Availability (China Ports)	High (Shanghai, Guangzhou, Qingdao)	Moderate (specialized bulk carriers)	High (standard container lines)
Transit Time (China → Europe/Middle East)	28–35 days	35–45 days	30–40 days
Port Infrastructure Requirements	Stern ramp, heavy-duty quay	Heavy-lift crane (>100t), open berth	Standard container crane, flat storage
Risk of Physical Damage	Low (controlled roll-on/off)	Medium (rigging/crane swing)	Medium–High (exposed during transit)
Weather Exposure During Transit	Low (below deck)	Low (in hold)	High (fully exposed)
Cost (per unit, FOB China)	$18,500 – $22,000	$15,000 – $19,000	$23,000 – $28,000
Insurance Premiums	Moderate	Moderate	High (due to exposure risk)
Suitability for Hydraulic Systems	High (minimal vibration)	Medium (potential shock loading)	Medium (vibration, salt spray)

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4. Comparative Analysis

4.1 RO-RO – Recommended for High-Value Units

• Advantages:
• Minimal handling; excavator driven on/off vessel.
• Protected from weather and salt spray during transit.
• Reduced risk to hydraulic lines and control systems.
• Disadvantages:
• Limited to ports with RO-RO ramps.
• Higher port dues in some destinations.

4.2 Bulk Cargo – Cost-Effective for Multi-Unit Shipments

• Advantages:
• Lower base freight cost for large, heavy machinery.
• Suitable for non-operational units without mobility.
• Disadvantages:
• Requires extensive rigging and port-side engineering.
• Extended loading/unloading increases exposure window.

4.3 Flat Rack – Flexible but High-Risk

• Advantages:
• Accommodates oversized dimensions beyond standard containers.
• Available on major container shipping lanes.
• Disadvantages:
• Full exposure to salt-laden atmosphere and sea spray.
• Increased corrosion risk without protective measures.
• Higher insurance and handling costs.

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5. Corrosion Protection: Wax Spraying Protocol

Underwater excavators are vulnerable to chloride-induced corrosion during maritime transit, especially when transported via Flat Rack or extended port layovers.

Recommended Protection: Anti-Corrosion Wax Spraying

Parameter	Specification
Application Method	Hot-spray or brush application (40–60°C)
Wax Type	Solvent-based, hydrophobic, salt-excluding polymer wax (e.g., DINITROL 4941 or equivalent)
Coverage Areas	All exposed steel surfaces, hinge points, undercarriage, hydraulic cylinder rods, fasteners
Film Thickness	150–200 µm (dry)
Duration of Protection	Up to 12 months in marine environments
Post-Transit Removal	Biodegradable solvent wash; no residue affecting operation

Benefits:

• Forms a moisture barrier against saltwater ingress.
• Self-healing properties under mechanical stress.
• Compatible with pre-existing factory coatings.
• Reduces post-arrival maintenance and commissioning delays.

Note: Wax spraying is strongly advised for Flat Rack and Bulk Cargo shipments. RO-RO units may use reduced coverage, focusing on undercarriage and joints.

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6. Recommendations

Scenario	Recommended Method	Rationale
Single-unit, time-sensitive delivery	RO-RO	Optimal protection, fast turnaround, low handling risk
Multi-unit project shipment (3+ units)	Bulk Cargo	Economies of scale; manageable risk with proper cradling
Destination lacks RO-RO infrastructure	Flat Rack + Wax Protection	Only viable option; wax coating mandatory
High-corrosion risk regions (e.g., Arabian Gulf, Southeast Asia)	RO-RO or Wax-Protected Flat Rack	Environmental severity demands maximum protection

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7. Conclusion

For underwater excavator exports from China, RO-RO shipping offers the best balance of safety, speed, and equipment protection and is the preferred method for most fleet and construction logistics planners. When RO-RO is unavailable, Bulk Cargo presents a cost-efficient alternative for consolidated shipments. Flat Rack remains a fallback but requires mandatory anti-corrosion wax spraying to ensure operational readiness upon arrival.

SEA LION International recommends integrating wax protection into standard export protocols regardless of method, with full documentation provided to end-users for post-arrival de-waxing and commissioning procedures.

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End of Report