1–20T Straight Boom Hydraulic Marine Deck Crane | 360° Slewing Shipboard Crane

Product Specification

1–20T Straight Boom Hydraulic Marine Deck Crane | 360° Slewing Shipboard Crane

Product Overview

The 1–20T straight boom hydraulic marine deck crane is a shipboard lifting appliance for handling cargo, stores, spare parts, hoses, tools, and general deck equipment within the crane’s approved load chart and operating envelope. Its rigid straight boom, hydraulic hoisting winch, luffing cylinder, and slewing system provide a comparatively simple arrangement for vessels that have sufficient deck clearance and do not require the folding geometry of a knuckle boom crane.

The catalogue range covers SWL values from 1 to 20 tonnes and working radii from 2 to 15 m, depending on model. The stated SWL must not be interpreted as constant capacity at every radius: final allowable load is governed by the approved load chart, vessel operating condition, foundation reaction loads, heel/trim criteria, wind and dynamic factors, and the applicable flag/class requirements. This page is for shipboard marine crane applications; offshore lifting, personnel lifting, subsea lifting, or other special service requires a separately defined design basis and approval scope.

Quick Specifications

• SWL range: 1–20 t → model range for shipboard cargo and equipment handling; final capacity at each radius follows the approved load chart.

• Working radius: 2–15 m → radius range is model-dependent and must be matched to deck layout, outreach, and required lifting points.

• Slewing range: up to 360° → final continuous/unlimited slewing arrangement and hose/slip-ring configuration are to be confirmed for the selected model.

• Hoisting speed: 10–15 m/min → catalogue range; final speed depends on SWL, reeving, hydraulic package, and approved configuration.

• Luffing time: 40–80 s → varies with crane size and boom/radius range; used to evaluate deck-handling cycle time.

• Hydraulic drive with electric motor: 7.5–132 kW → power requirement varies by crane size; vessel voltage, frequency, starting method, and HPU arrangement must be confirmed.

• Reference pedestal diameter: 700–1900 mm → useful for preliminary deck arrangement only; final foundation and interface loads require approved GA and structural calculations.

• Surface protection: Sa 2.5 blasting + epoxy coating as stated → final coating system, DFT, colour, topcoat, and corrosion category are project-specific.

Main Technical Parameters

Catalogue parameters supplied for preliminary model selection. Final load chart, hoisting height, hook travel, foundation loads, overall dimensions, and approved GA drawing are to be confirmed for each project.

Crane Selection & Vessel Interface

Step 1: Define the lifting case: maximum lifted load, required working radius, hoisting height, hook travel, lifting frequency, cargo/equipment type, and whether operation is in harbour, sheltered water, or another defined vessel condition.

Step 2: Select the crane by load chart, not SWL alone. Provide the required load at each critical radius so the supplier can issue the correct rated-capacity / load-radius chart and avoid assuming full SWL over the complete radius range.

Step 3: Confirm vessel motions and design conditions: vessel type, installation position, heel/trim criteria, wind condition, ambient temperature, sea-state or dynamic requirement if applicable, and any special low-temperature or hazardous-area requirement.

Step 4: Confirm deck interface: pedestal location, available deck space, surrounding obstructions, deck/foundation structure, reinforcement concept, required interface loads, and whether the shipyard requires bolted or welded foundation details.

Step 5: Confirm power and controls: vessel electrical supply, hydraulic power unit arrangement, local or remote control requirement, emergency stop philosophy, and any class-required alarms, interlocks, limits, or monitoring.

Step 6: State the approval scope before quotation: flag state, classification society, applicable crane standard, certificate/test scope, quantity, delivery destination, required delivery time, and vessel GA / installation drawing if available.

Structure & Main Systems

Straight boom assembly | Hydraulic hoisting winch and wire-rope reeving | Luffing cylinder | Slewing bearing and drive | Pedestal / foundation interface | Hydraulic power unit and valve block | Local control station | Electrical control and protection | Hook block and sheaves

Marine Engineering & Safety Considerations

• Load-radius relationship is the primary selection basis. The crane structure, boom, winch, wire rope, slewing system, pedestal, and ship foundation must be verified against the approved design load cases rather than a single catalogue SWL value.

• The ship’s deck and supporting structure are part of the lifting system. Foundation reaction forces and moments should be issued for shipyard structural verification, and the final pedestal connection should follow the approved installation drawing.

• Hydraulic components, wire rope, brakes, sheaves, bearings, and slewing gear should be selected and inspected for the intended duty cycle and marine environment. Maintenance access and safe service points should be considered at GA stage.

• Safety devices such as hoist limits, overload protection, emergency stop, fail-safe braking, alarms, and motion limits are project/class items and should be confirmed in the technical specification rather than assumed from the catalogue table.

• The stated −40 °C to +50 °C temperature range is not treated as a blanket standard condition. Operation below −20 °C requires specific low-temperature design consideration, while +50 °C operation also requires component and hydraulic-system confirmation.

• Marine and offshore crane duty are not interchangeable. Offshore lifting can introduce different dynamic, environmental, structural, and certification requirements and should be quoted as a separate design basis when required.

Custom Attributes

• Crane Type: Straight boom hydraulic slewing marine deck crane → rigid boom arrangement for general shipboard lifting where folding geometry is not required.

• Rated Capacity: 1–20 t SWL range → final allowable load is defined by the approved load chart at the applicable radius.

• Working Radius: 2–15 m range → select according to vessel layout and required outreach, with model-specific minimum and maximum radius.

• Slewing: Up to 360° → continuous/unlimited rotation, hose routing, collector/slip-ring arrangement, and slewing limits are to be confirmed.

• Drive: Electro-hydraulic → vessel electrical data and HPU configuration are required for final motor and starter selection.

• Control: Local control as basic project concept → remote pendant, radio remote, cabin control, or dual station only when specifically required and approved.

• Ambient Temperature: −40 °C to +50 °C stated range → project-specific design verification required, especially below −20 °C and above +45 °C.

• Surface Treatment: Sa 2.5 blasting + epoxy coating as stated → final paint system and DFT follow vessel/project coating specification.

• Personnel Lifting: Not included by default → only permitted when the crane is specifically designed, equipped, tested, and approved for personnel handling.

How It Works

Electric motor powers the hydraulic system → Hydraulic winch hoists or lowers the hook → Luffing cylinder changes boom angle and working radius → Slewing drive rotates the crane around the pedestal → Operator controls coordinated motions within the approved load chart and safety limits

Applications

Cargo and stores handling on merchant vessels | Workboats and service vessels | Tug and support-vessel deck handling | Fishing-vessel equipment handling | Spare-parts and machinery transfer | Shipboard hose / tool / provision handling | Newbuilding and retrofit projects

Certifications & Compliance

For SOLAS ships, onboard lifting appliances are subject to SOLAS Regulation II-1/3-13 from 1 January 2026, including requirements for design/construction/installation, examination, load testing, maintenance, inspection, and operation as applicable. The final compliance route depends on vessel flag, class, installation date, crane service, and approved design basis.

Class approval, product certification, load testing, witness inspection, material traceability, and documentation can be arranged according to project requirement and are subject to the selected classification society’s approval procedure.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

Drawing & Photos

FAQ

Q1: Is a 20T crane able to lift 20 tonnes at the full 15 m radius?

A1: Not necessarily. The catalogue table gives model SWL and working-radius ranges, but the permitted load at each radius must follow the approved load chart. Please provide the required load at each critical radius for correct selection.

Q2: Can this marine deck crane be used for offshore lifting?

A2: Offshore lifting is not assumed for this standard shipboard page. If the crane will operate on an offshore unit or under offshore dynamic conditions, the environmental loads, dynamic factors, applicable offshore/class rules, safety functions, and certification scope must be defined separately before quotation.

Q3: What information is required for a technical offer and GA drawing?

A3: Please provide SWL and required load-radius points, hoisting height, vessel type, installation location, deck/foundation information, vessel operating condition, heel/trim criteria, ambient temperature, power supply, control requirement, class/flag requirement, quantity, destination, and required delivery time.

• Product photos