Marine EPDM Module MCT Cable Sealing Solution

— Constructing an integrated penetration protection system for ships that is watertight, fire-tight, airtight, and corrosion-resistant.

Note: Upon verification, “MTC” is usually a typo or a misnomer in the marine engineering field. The correct term should be MCT (Modular Cable Transit). The following content is based on industry-standard practices and mainstream products.

1. 1. What is the marine MCT cable sealing system?

MCT (Modular Cable Transit) is a standardized cable transit assembly consisting of a metal frame, a variable diameter sealing module, and a clamping device. It is specifically designed for cable bundle penetration through ship bulkheads/decks. Its core value lies in:

Maintaining compartment integrity: Preventing the spread of water, fire, smoke, and oil vapors through cable holes.

Adaptable to complex cabling: A single system can seal dozens of cables of different diameters.

Meets international maritime standards: mandatory certifications such as SOLAS, IMO, CCS, and DNV.

1. 1. Shipborne Application Scenarios and Core Requirements

📌 Regulatory requirements:

SOLAS Convention, Chapter II-2: Cables penetrating fire-resistant bulkheads must maintain the same fire resistance rating.

CCS Classification Rules for Steel Seagoing Ships: Through-bulk devices must pass type tests (watertightness, airtightness, fire resistance).

III. Key Technical Performance Indicators

1. 1. Mainstream Products and Suppliers (Marine Applications)

4.1 International Brands

4.2 Domestic substitution (certified by classification society)

TST SEAL ( China ): Certified by CCS, BV, and ABS, offering high cost-performance.

💡 Selection advice:

Merchant ships/cruise ships: TST SEAL (Maintenance convenience preferred)

Warships/Research Vessels: TST SEAL (High Reliability Priority)

Inland/coastal vessels: TST SEAL (cost-sensitive scenarios)

1. 1. Key Points of Installation and Maintenance

✅ Correct installation process:

Opening matching: The dimensions of the bulkhead openings must be strictly in accordance with the outer diameter of the MCT frame (tolerance ±1mm).

Welding/Screw Connection: Continuous welding around the entire circumference of the frame and bulkhead (spot welding is prohibited).

Module cutting: Use a special tool to make holes; hole diameter = cable outer diameter + 0.5mm.

Clamping torque: As per manufacturer’s requirements (usually 20–30 N·m), avoid overpressure to prevent damage to the module.

🔧 Maintenance Recommendations:

Check the module every 6 months for hardening or cracking.

Each time the vessel enters the dry dock, the water tightness is tested (air pressure test, 0.05 MPa, pressure held for 10 minutes).

Cable additions and reductions: Roxtec and other systems support uninterrupted capacity expansion.

⚠️ Common causes of failure:

Paint between the frame and the bulkhead → Poor welding → Watertight failure

Module aperture too large → Cable swaying → Wear of sealing interface

1. 1. Advantages of TST SEAL Sealing Module System Compared with Traditional Sealing Methods

📊 Data: Statistics show that the TST SEAL MCT system has a 35% lower total lifecycle cost on ships than traditional methods.

On ships, these “mobile high-risk industrial platforms,” the MCT cable sealing system, though concealed within the bulkheads, serves as the last line of defense against fire, water, and explosions. From massive 10,000-ton vessels to deep-sea research ships, its modular, highly reliable, and easy-to-maintain characteristics safeguard every safe voyage. A reliable seal is a lifeline .

“The ocean never forgives negligence—and MCT is the most rigorous commitment to detail.”

Choosing TST SEAL’s MCT solution, which complies with SOLAS and classification society certifications, is like installing a safety lock on a vessel that will never come loose.