Navigation
Related

Navigation

Related

Marine folding boom crane, 22t capacity (Technical supply specification)


1. General Data (Operating Conditions)

The folding boom crane operates reliably in marine environments under the following conditions:

  • Continuous exposure (unlimited duration) to 98% relative humidity at +35 °C with seawater splashing.
  • Permanent vessel heel to any side up to 5°.
  • Permanent vessel trim by bow or stern up to 2°.
  • Sea state 2–3.
  • Shipboard vibration.

Operating conditions in stowed position:

  • After prolonged (unlimited duration) non-operational storage at a minimum ambient air temperature down to -45 °C.
  • Vessel heel to any side up to 15°.
  • Vessel trim by bow or stern up to 5°.
  • Roll amplitude up to 40°.
  • Pitch amplitude up to 10°.
  • Wind load up to 2000 Pa (200 kgf/m²).

2. Purpose

Cargo handling operations at the pier and onboard the vessel at sea with non-explosive cargoes, including offshore supply and boat handling operations.

Folding boom crane 22 t capacity, side view dimensional drawing
Folding boom crane 22 t capacity, side view dimensional drawing

About

Folding Boom Crane: Modern Approach to Lifting Operations

The folding boom crane provides a versatile solution for operations in confined spaces. Its design enables lifting where traditional equipment cannot physically deploy. Due to its compact stowed footprint, the crane is suitable for industrial sites and installation works in tight urban developments.

Design Evolution and Advantages

The folding boom concept is based on maximizing structural kinematics. The multi-link articulation enables smooth geometry adjustments during operation, allowing the operator to maneuver loads with high precision. This is critical for equipment installation, structural assembly, and maintenance of architecturally complex facilities.

Operational Flexibility Across Industries

The folding boom crane is utilized in shipbuilding, industrial facilities, and power generation plants where a combination of compact footprints and functional flexibility is required. It operates with equal efficiency in open yards and indoor production areas where precise load positioning is critical and interference with adjacent machinery must be avoided.

Manufacturer’s Contribution to Equipment Quality

Izhora Hydrosystems LLC manufactures this equipment in compliance with engineering standards and lifting system development experience. The company’s manufacturing approach focuses on reliability, operational convenience, and the seamless integration of cranes into existing technological processes without onsite modification.

Intelligent Control Systems

Modern models utilize advanced operator-machine interfaces. Control panels, sensors, automatic safety correctors, and real-time visualization of operating parameters increase operational predictability. This enables the operator to control the process with high precision, maintaining operational safety even at complex boom configurations.


3. Scope of Supply

3.1. Folding boom crane, 22 t capacity

3.1.1 Product Composition

ComponentQuantity
Crane with electrical and hydraulic equipment (control cabin, electrical switchboards)1 set
Pedestal with lower edge prepared for welding and integrated hydraulic power unit (HPU)1 set
Portable control panel with cable1 set
Toolkit for securing the crane to the adapter flange1 set
Tooling for hydraulic system filling and draining1 set
Electrical safety markers (“high voltage”, “grounded”)1 set
Folding boom crane 22 t capacity, top view dimensional drawing
Folding boom crane 22 t capacity, top view dimensional drawing

3.1.2 Main Parameters

ParameterValue
Model typeElectro-hydraulic folding boom crane
SWL, harbor conditions, at 10 m outreach22 t
SWL, harbor conditions, at 21.8 m outreach9 t
Operating radius, max.21.8 m
Operating radius, min.3.5 m
Hook lowering depth below crane baseline15 m
Crane duty cycleIntermittent duty, 25% cyclic duration factor (ED)
Slewing angleContinuous
Boom length in stowed position (from crane centerline)14 m
Pedestal outer diameter1.7–2.1 m
Pedestal materialGrade D40 steel
Cabin arrangementRight-hand side
Total weight including HPU, equipment, pedestal, boom, cabin, and oil35 t
Total power consumption75 kW
Climate execution classOM1 according to GOST 15150-69
Main power supply400 V, 50 Hz, 3-phase, 3-wire
CertificationRMRS (RS) Certificate form 6.5.30

3.1.3 Spare Parts and Tools (ZIP)

Manufacturer’s standard spare parts, tools, and accessories kit for 1 year of operation.

3.1.4 Documentation

DocumentQuantity
Technical Passport1 set
Installation and Operation Manual1 set
Rigging and lifting diagram for installation1 set
Onboard testing procedure1 set

3.1.5 Certificates

  • RMRS (RS) Certificate form 6.5.30

4. Additional Requirements

  • Ingress protection rating for electrical equipment on open deck is IP56, and minimum IP22 indoors according to GOST 14254-2015.
  • The crane control system provides stepless speed control for all crane motions from zero to maximum, as well as simultaneous motions (with reduced maximum speeds).
  • Crane control is operated both from the cabin and via a portable wireless control unit.
  • The portable wireless control unit creates no radio interference for helicopters in compliance with ICAO Doc 9718.
  • The portable control unit features an auxiliary cable connection for operation when wireless control is unavailable, with a minimum cable length of 15 m.
  • A carbon dioxide fire extinguisher with a 5 kg charge capacity is installed inside the operator’s cabin.
  • Cabin arrangement and anti-reflective glazing provide an unobstructed view of the cargo handling area.
  • An autonomous cabin window washing system, window heating, wipers, and sun blinds are provided.
  • Cabin features thermal and acoustic insulation, a heating unit, and an autonomous air-cooled air conditioning system (split-system).
  • Crane cabin is manufactured in compliance with GOST 33173.1-2014.
  • Controls feature inscriptions in Russian and/or symbols unambiguously defining their purpose.
  • The control system incorporates an interlocking device to prevent simultaneous operation from the cabin and the portable control panel.
  • Red “EMERGENCY STOP” buttons are installed on both the cabin console and the portable control panel to disconnect the main electric drive circuits and brake all crane motion mechanisms, along with “Operation” and “Common Fault” indicator lights.
  • The control panel features an operating conditions selector switch: “1. Harbor conditions (sea state 0). 2. Sea state 2–3.”
  • The crane is supplied with a pedestal to be welded to the vessel foundation.
  • The pedestal shell at the vessel interface section features an edge prepared for welding.
  • Fasteners and the required toolkit for securing the crane to the pedestal are included in the scope of supply.
  • The crane pedestal accommodates a dedicated hydraulic power unit (HPU) compartment, complete with access door, standard lighting, and ventilation.
  • All hydraulic connections between the HPU and the crane actuators are included in the scope of supply and installed by the supplier. Placement of the HPU inside the crane engine room is permitted.
  • An emergency escape route via a ladder to the crane platform is provided for the operator in emergency situations.
  • An emergency hand pump is provided to bring the crane to the stowed position from any intermediate position.
  • The crane design ensures compliance with safety requirements during installation, operation, maintenance, and repair.
  • Failure of any crane component, voltage fluctuation, or pressure drop will not result in an emergency situation.
  • The folding boom crane is equipped with automatic limiters for overload, slack rope, and hook/boom end-of-travel positions. Reverse motion is enabled after limiter activation.
  • Adjustable safety devices are sealed.
  • The electric drive features zero-voltage protection, overload protection, interlocking contact start-up protection, and short-circuit current protection.
  • Pump unit power circuits are equipped with soft starters to limit starting currents.
  • The crane is equipped with a siren bell, an outreach indicator, a boom floodlight, and two red obstruction lights (on the column top and the boom tip).
  • The folding boom crane is supplied complete with switch boxes containing circuit breakers to disconnect power from the pump units.
  • Separate power supply is provided for the cabin lighting system. The power feeder switch is standardly installed in the crane adapter.
  • A socket (1~230 V, 50 Hz) is provided in the cabin for maintenance purposes.
  • The slewing structure, boom, electrical equipment, and all live components are reliably grounded.
  • The design prevents accidental contact with live components, and all electrical equipment enclosures are marked with electrical hazard symbols.
  • Hoisting and slewing mechanisms are equipped with normally-closed brakes, and luffing cylinders feature hydraulic lock valves.
  • Rope sheaves are fitted with retainers to prevent rope dislodgement.
  • The hook is of a safety closed type with a latch, and the load block and wire rope are made of corrosion-resistant materials.
  • Non-combustible or flame-retardant materials are utilized throughout the crane structure.
  • Equipment is delivered fully coated and marked, with a coating system thickness of 250–300 μm (minimum 3 layers) and a 5-year service life.
  • The color of open deck equipment is subject to Customer approval, and for icebreakers, to the approval of the designer and the shipyard.
  • Electrical equipment is marked in compliance with GOST IEC 61293-2016.
  • Standard grounding points are provided.
  • External surfaces feature anti-corrosion protection, and hydraulic piping is made of salt-spray-resistant stainless steel.
  • Interfaces support communication protocols for all connected equipment and systems.

5. Manufacturer

Izhora Hydrosystems LLC


6. Warranty Period

12 months from the date of shipment, unless otherwise provided by the contract.


Contacts

Phone: +7 (812) 339-61-68

Email: contact@i-hydro.tech