Name: Subsea Enclosure Aluminum Tube
Brand: Blu-Sub
SKU: BS-SSC-ENCLT-ALU-A2A0
Price: 215.0 CAD
Availability: InStock

$215.00

8 Units Available for Quick Ship - Ships in 1-2 Business Days

Additional Units Made to Order - Ships in 2-5 Weeks

HS 7616.99 (CN)

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The Subsea Enclosure Aluminum Tube is a robust, pressure-rated housing component engineered for demanding underwater applications. Constructed from high-strength aluminum alloy, it functions as a compact underwater pressure housing or engineered pressure vessel (PV) for subsea systems. It offers excellent corrosion resistance and structural integrity, making it ideal for long-term deployments at depths up to 1,000 meters (3,280 feet). Unlike acrylic alternatives, aluminum is impervious to UV degradation, making this tube well-suited for surface-exposed systems or sunlit marine environments.

This tube is designed for seamless integration with the Subsea Aluminum Flange, which is used in combination with the Subsea Aluminum End-Cap to create a high depth-rated, mechanically retained sealing system. The flange uses dual O-rings and mechanical compression to ensure a reliable watertight seal, maintaining the integrity of this pressure vessel (PV) under deep-sea operating conditions.

For applications where internal visibility is required, the tube is also compatible with the Subsea Acrylic End-Cap, which requires the Subsea Aluminum Flange for installation and provides a cost-effective, transparent sealing solution for shallower deployments. For 115 mm systems, additional integrated flange/end-cap options include the Subsea Polymer Flange & End-Cap 115mm, the Subsea Optical Dome Flange & End-Cap 115mm, and the Subsea Optical Glass Flange & End-Cap 115mm, depending on optical and depth requirements.

Side locking ports on the Subsea Aluminum Flange and the Subsea Optical Glass Flange & End-Cap interface directly with the tube, offering optional mechanical retention of the end cap and flange. This is especially beneficial for high-vibration conditions or when deploying vertically in tethered systems, where movement or pressurization cycles could otherwise dislodge unfastened components. The Subsea Aluminum Flange secures to the tube using four set screws that engage with these locking ports.

This enclosure is well-suited for applications such as deep-sea ROVs, long-duration sensor pods, and other subsea systems requiring durable, corrosion-resistant housings. As an engineered pressure vessel, its compatibility with Blu-Sub’s modular sealing components ensures reliable performance in challenging underwater conditions.

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Material	Black anodized aluminum, precision-machined ends with Arca-Swiss grooves
Weight	Varies by length; see technical table
Color	Black
Depth Rating	1,000 m / 3,281 ft
Dimensions	Refer to dimension drawing

Description

The Subsea Enclosure Aluminum Tube is machined to tight tolerances for seamless integration with Blu-Sub’s modular flange and sealing components. Its rigid cylindrical structure resists deformation under pressure, enabling consistent O-ring compression and long-term watertight performance in subsea environments. This design forms the foundation of an engineered pressure vessel (PV) system capable of maintaining stability under extreme underwater conditions.

Aluminum's high thermal conductivity makes this enclosure well-suited for systems that generate internal heat. Unlike plastic or acrylic housings, it functions effectively as an underwater pressure housing, facilitating passive heat dissipation to the surrounding water, helping protect sensitive electronics and improving overall thermal stability in sealed systems.

When securing the Subsea Aluminum Flange or any other flange/end-cap assembly to the tube, be sure to thoroughly lubricate all flange O-rings using O-Ring Lubricant – MOLYKOTE® 111 Compound. Do not force the flanges into position, as inadequate lubrication can cause damage to the O-rings and/or the flange interface, compromising the pressure vessel (PV) seal integrity.

The tube is most commonly sealed using the Subsea Aluminum Flange paired with either the Subsea Aluminum End-Cap for high depth-rated deployments, or the Subsea Acrylic End-Cap for cost-effective, transparent builds where internal visibility is required (shallower use). For 115 mm systems, additional integrated options include the Subsea Polymer Flange & End-Cap 115mm, Subsea Optical Dome Flange & End-Cap 115mm, and Subsea Optical Glass Flange & End-Cap 115mm.

With no transparent surfaces or light-transmitting properties, this enclosure type is preferred for systems where visual access is unnecessary or where shielding from light, biofouling, or EMI is advantageous. As part of Blu-Sub’s modular subsea system, it performs as a dependable engineered pressure vessel for deep-ocean electronics and long-duration deployments.

Flange & End-Cap Options

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Subsea Aluminum End-Cap
Provides a rugged sealing interface for the aluminum tube, using dual O-rings and mechanical compression. The Subsea Aluminum Flange is required to mount the Aluminum End-Cap and achieve a secure, watertight seal. We offer several pre-configured hole patterns for common setups, making integration with penetrators and connectors easy. Depth Rating: Up to 1,000 m / 3,281 ft.

Subsea Acrylic End-Cap
A cost-effective, transparent end-cap option for applications where internal visibility is required. Used with the Subsea Aluminum Flange to create a watertight seal. Thru-hole only design with lower depth ratings depending on diameter (up to 300 m / 984 ft).

Subsea Plastic Flange & End-Cap 115mm
An economical option for general-purpose use. Only available for 115 mm tube systems. Depth Rating: Up to 30 m / 98 ft.

Subsea Optical Dome End-Cap
Provides a wide-angle acrylic viewing dome for underwater vision systems requiring minimal distortion. Only available for 115 mm tube systems and requires the Subsea Aluminum Flange for installation. Depth Rating: Up to 1,000 m / 3,281 ft.

Subsea Optical Glass Flange & End-Cap 115mm
Features a precision optical window for imaging and sensor payloads. Only available for 115 mm tube systems. Depth Rating: Up to 300 m / 984 ft.

Alternative Blu-Sub Enclosure Options

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Blu-Sub Enclosure Acrylic Tube
Offers a lightweight and optically clear alternative for underwater applications. Available in 85 mm, 115 mm, and 165 mm diameter sizes, the acrylic tube supports visual inspection, lighting, and compact electronics. Compatible with Blu-Sub flanges, end-caps, and internal tray sets. Depth Rating: 20 m – 250 m / 66 ft – 820 ft (varies by size and length).

Blu-Sub Watertight Enclosure Box
A rugged subsea housing solution for compact electronics and battery modules. Made from corrosion-resistant aluminum, it provides a direct thermal path for component heat dissipation and is pre-drilled with M10 holes for cable penetrator and connector installation. Depth Rating: Up to 300 m / 984 ft.

Compatible With: Aluminum Tube Enclosure Mounting Plate

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Aluminum Tube Enclosure Mounting Plate
Designed specifically for Blu-Sub Aluminum Tube Enclosures, this mounting plate enables secure installation onto Arca-Swiss compatible systems. Available in both wide (46 mm) and narrow (10 mm) formats, each version clamps laterally using M4 screws and offers flexible installation with threaded and countersunk mounting holes. Manufactured from black anodized aluminum, it provides durable, corrosion-resistant support for a variety of subsea deployment scenarios.

Aluminum Tube Enclosure Mounting Plate

Enclosure Interior Fitting Options

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Electronic Tray Set for Enclosure Tube
Provides a modular mounting system for internal electronics, batteries, and PCBs within Blu-Sub enclosures. Available for 85 mm, 115 mm, and 165 mm tubes, the tray includes base mounts, shelf supports, and mounting hardware. It is fully compatible with both aluminum and acrylic tube housings, offering a structured and secure layout for subsea components.

Insulated PCB Board Shelf for Enclosure Tube
Designed to fit directly into the tray set using single-point or double-point shelf supports. Made from green, double-sided electrically insulated PCB material, it includes pre-marked point holes to assist with component drilling, pass-throughs, and cable routing.

Optional Vent & Vacuum Control Solutions

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Blu-Sub offers two compatible solutions for managing pressure equalization, enclosure servicing, and vacuum leak testing. Each option supports different operational needs and levels of sealing performance:

Subsea M10 Self-Sealing Vent & Vacuum Plug
An advanced self-sealing port that allows both vacuum leak testing and retention of negative internal pressure after hose removal. The internal valve and lock cap maintain vacuum post-disconnection, making it ideal for preventing condensation or stabilizing pressure. Includes bulkhead, copper vacuum plug, and lock cap. Rated to 1,000 m / 3,280 ft. Applying negative pressure can also help hold the enclosure closed, improving seal performance during storage or deployment.

Subsea M8 Vent & Vacuum Plug
A compact two-part system for manual venting and temporary vacuum testing. Vacuum must be resealed manually by inserting the plug after test. Best for quick leak checks or venting during servicing. Rated to 1,000 m / 3,280 ft. Brief vacuum pressurization can assist with pulling flanges tight or holding enclosure lids shut prior to fastener installation.

SHIPPING LIST

1 x Enclosure Aluminum Tube

Technical Specifications

Item	Material	Depth Rating	Weight
115 Aluminum Tube / 150 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	832 g
115 Aluminum Tube / 200 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	1,116 g
115 Aluminum Tube / 250 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	1,435 g
115 Aluminum Tube / 300 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	1,715 g
115 Aluminum Tube / 350 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	2,020 g
115 Aluminum Tube / 400 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	2,307 g
115 Aluminum Tube / 450 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	2670 g
115 Aluminum Tube / 500 Length	Black Anodized Aluminum	1,000 meters / 3,281 ft	2965 g

NOTE: There may be some white residue or discoloration at both ends due to the anodization process. This is purely cosmetic and does not affect waterproofing or sealing performance.

Item	Inner Diameter (A)	Outer Diameter (B)	Length (C)	Arca-Swiss Interface (D)	Interface Distance (E)	Piston Hole Depth (F)
115 Aluminum Tube	104 mm	115 mm	Total Length ±0.5 mm	38.1 mm	119 mm	28 mm

Can it still be used if the O-ring contact surface is scratched?
No. Any damage to the O-ring contact surface may compromise sealing and poses a risk of leakage. The enclosure should not be used if the sealing surface is scratched, as even minor imperfections can affect the watertight integrity of the pressure vessel (PV).

Can custom lengths be requested?
Yes, custom lengths are available upon request for an additional fee. Please note that longer tubes may have lower pressure resistance, and lead times may vary based on the length and order quantity. Custom dimensions are often used in specialized engineered pressure vessel builds and underwater pressure housings for research and industrial applications.

Are other diameter sizes available?
Yes, other internal and external diameter configurations are in development. Contact us if you require a specific size for your system or for integration into a modular pressure vessel (PV) assembly.

Are they compatible with Blu-Sub Acrylic Tubes?
Yes, Blu-Sub Subsea Aluminum Enclosure Tubes are designed to be compatible with Blu-Sub Acrylic Tubes and can be interchanged. Minor differences in internal volume or fit may apply due to material differences, but both function as underwater pressure housings within Blu-Sub’s modular subsea enclosure system.

What are the four holes on the side of the tube for?
These holes align with threaded holes on the flange body and are intended for optional mechanical locking using set screws. While not required for operation, they provide added protection against flange separation. Unlike acrylic tubes, aluminum tubes do not rely on vacuum retention and are mechanically lockable by design—ensuring structural reliability under engineered pressure vessel conditions.

3D Model Viewer

Note: The 3D model shown above is for reference purposes only. It may include components, accessories, or alternate sizes not included with the product. For simplicity, only a single representative size is typically displayed when multiple versions exist. Please refer to the product Shipping Guide for detailed information on included contents and size-specific differences.

Download 3D Model (STEP) - 115 Aluminum Tube 200 Length

Download 3D Model (STEP) - 115 Aluminum Tube 250 Length

Download 3D Model (STEP) - 115 Aluminum Tube 300 Length

Download 3D Model (STEP) - 115 Aluminum Tube 350 Length

Download 3D Model (STEP) - 115 Aluminum Tube 400 Length

Download 3D Model (STEP) - 115 Aluminum Tube 150 Length

Download 3D Model (STEP) - 115 Aluminum Tube 450 Length

Download 3D Model (STEP) - 115 Aluminum Tube 500 Length