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Watertight shell door 1300x800mm (Technical supply specification)


1. General Data (Operating Conditions)

Operating conditions:

  • Storage temperature, °C: -40 to +45
  • Operating temperature, °C: -20 to +45
  • Resistance to marine vibration
  • Resistance to periodic marine water splashing

2. Purpose

The shell door is designed to open and close the opening in the vessel hull during oil product recovery from the water surface.

Watertight shell door 1300x800mm dimensional drawing: coaming, side view, front view
Watertight shell door 1300x800mm dimensional drawing: coaming, side view, front view

About

Shell Doors: A Critical Component of Maritime Infrastructure

Marine vessels operate in harsh environments, experiencing extreme seasonal temperatures, constant saltwater exposure, and severe wave loads. The shell door is a critical system designed to withstand these environmental challenges, ensuring precise open and close control of openings within the vessel hull.

Function and Application

The shell door acts as a structural barrier between the internal compartments of the vessel and the open sea. It enables safe liquid intake from the water surface while maintaining hull integrity and protecting internal spaces. This equipment is essential for vessels engaged in oil product recovery and liquid cargo operations, where precise process control is critical.

Operating Principle

The system integrates mechanical and hydraulic solutions. The door operates seamlessly during opening and closing sequences, with a manual override capability included for emergency operations. This combination ensures reliable performance under extreme weather conditions, across the full specified operating and storage temperature ranges.

Materials and Design Features

To withstand marine vibration and continuous saltwater exposure, the shell door is manufactured from high-tensile steel and treated with a heavy-duty marine coating system. The structural design optimizes installation and maintenance workflows, ensuring seamless integration into the vessel hull structure.

Manufacturing and Quality Assurance

Izhora Hydrosystems LLC specializes in the design and manufacture of these complex marine systems. Each shell door undergoes rigorous factory acceptance testing and is delivered with a comprehensive technical documentation package confirming compliance with applicable maritime standards.

Modern Fleet Integration

Shell doors are widely integrated into various vessel types. They allow the crew to execute fluid intake operations safely, minimizing operational risks and increasing efficiency during offshore tasks.


3. Scope of Supply

3.1 Watertight Shell Door 1300x800mm Assembly

3.1.1 Component List

ComponentQuantity
Coaming assembly with door leaf1 set
“Open/closed” position sensors, cabling, cable glands, fasteners, terminal boxes1 set
Hydraulic hoses, pipes, fittings, counter-connections, fasteners, valves, manifold blocks, internal shell door piping1 set
Door leaf open/close actuators, cleats (hydraulic cylinders with counterbalance valves and piping)1 set
Hydraulic cylinder mounting brackets1 set
Emergency manual open/close drive (mechanical lever and valve system)1 set
Technical documentation and certificates1 set
Spare parts, tools, and accessories (SPTA) kit1 set
Local control station (option)1 pc.
Watertight shell door 1300x800mm dimensional drawing: top view
Watertight shell door 1300x800mm dimensional drawing: top view

3.1.2 Main Parameters

ParameterValue
Shell door typeA-30, single-leaf, hinged, weathertight against sea action, hydraulically operated, right-hand and left-hand configurations
CertificateManufacturer’s certificate
Clear opening size1300×800 mm (clear dimensions per drawing, with radiused corners)
Design external pressureMin. 25 kPa
Fire resistanceClass A-30 thermal insulation
Nominal hydraulic system pressure17.5 MPa
Door leafSteel grade 09G2S, thickness 8 mm, flush with the vessel hull plating
CoamingSteel grade 09G2S, category min. 12, welded installation
InsulationROCKWOOL SeaRox 620 ALU A30 or equivalent
HingesHinged type, structural steel
Opening directionRight-hand and left-hand (door leaf retracts completely clear of the opening, secured by a hydraulic cylinder)
SealingFire-resistant sealing gasket
CleatsCentralized hydraulic actuator, structural steel
Drive typeHydraulic
Electrical equipmentMotor protection rating min. IP56, HPU power cabinet min. IP56
Control typeRemote
Internal liningSteel sheet, thickness 2 mm

3.1.3 Spare Parts, Tools, and Accessories (SPTA) Kit

Standard manufacturer’s scope for 1 year of operation.

3.1.4 Documentation

DocumentQuantity
Technical documentation1 set
Factory acceptance test (FAT) report1 pc.
Manufacturer’s certificate1 pc.

3.1.5 Certificates

The manufacturer’s certificate and factory acceptance test report are included in the scope of supply.

4. Additional Requirements

  • All materials are resistant to the specified operating and storage temperature ranges (-40°C to +45°C).
  • Coating system and color code are subject to customer approval.
  • Scope of supply includes all counter-connections for piping, flanges, fasteners, grounding lugs, and cable glands.
  • Labeling and nameplates are provided in Russian.
  • Packaging allows for crane and forklift handling, road transport, and sheltered storage.
  • Final dimensions of finished assemblies may vary by ±2 mm.

5. Manufacturer

Izhora Hydrosystems LLC


6. Warranty Period

12 months from the delivery date, unless otherwise specified in the contract.


Contacts

  • Phone: +7 (812) 339-61-68
  • Email: contact@i-hydro.tech