Marine Insight: Steel Marine Door

The steel marine door is a critical component in the structural integrity and operational safety of commercial and naval vessels. As part of marine outfittings, these doors serve as primary access points between compartments and are engineered to meet stringent maritime safety standards. Their primary function extends beyond simple access control—they are designed to maintain watertight and fire-resistant barriers, essential for preventing the spread of flooding and fire in emergency situations. In the event of hull breach or onboard fire, the performance of steel marine doors directly impacts the vessel’s ability to remain afloat and protect crew and cargo. As such, international regulations including SOLAS (Safety of Life at Sea) mandate the installation of certified watertight and fire-rated doors in designated zones across all seagoing vessels.

Steel marine doors are typically installed in engine rooms, bulkheads, accommodation areas, and cargo holds, where compartmentalization is vital. Constructed from high-tensile marine-grade steel, these doors are resistant to corrosion, mechanical stress, and extreme environmental conditions encountered at sea. Their robust design ensures long-term reliability, minimizing maintenance downtime and enhancing vessel operability over its service life. Additionally, many steel marine doors are equipped with pressure seals, locking mechanisms, and visual indicators to confirm proper closure, further contributing to onboard safety protocols.

Sourcing high-performance steel marine doors from Hangzhou Star Marine Technology Co., Ltd. offers significant advantages in terms of quality assurance and cost-efficiency. As a specialized manufacturer in marine outfittings, Star Marine China adheres to international classification society standards, including CCS, ABS, DNV, LR, and BV. This ensures that every door produced meets global compliance requirements and is suitable for installation on vessels operating in international waters.

Moreover, Star Marine leverages advanced manufacturing technologies and streamlined supply chain operations based in China, allowing for competitive pricing without compromising on quality. The company’s in-house production capabilities—from raw material processing to final inspection—enable strict quality control and faster lead times compared to many Western suppliers. This makes Star Marine an ideal partner for shipbuilders, repair yards, and marine equipment distributors seeking reliable, certified marine doors at optimal cost structures.

The following table outlines key technical and commercial advantages of Star Marine’s steel marine doors:

Feature	Specification/Advantage
Material	Marine-grade mild steel, hot-dip galvanized or painted for corrosion resistance
Certification	CCS, ABS, DNV, LR, BV, and SOLAS compliant
Door Types	Watertight, fire-rated (A-0 to A-60), gas-tight, and acoustic insulation options
Standard Sizes	Customizable from 600×1800 mm to 900×2100 mm or client-specific dimensions
Operating Mechanism	Swing, sliding, or vertical lifting types with manual or hydraulic actuation
Lead Time	4–6 weeks for standard orders
Cost Advantage	15–30% lower than equivalent EU or South Korean manufactured units

By combining regulatory compliance, durable engineering, and cost-effective manufacturing, Hangzhou Star Marine Technology delivers steel marine doors that enhance vessel safety while supporting economical procurement strategies for global maritime operations.

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Technical Specs & Approval

Technical Specifications: Steel Marine Door

Hangzhou Star Marine Technology Co., Ltd. designs and manufactures steel marine doors to stringent international maritime safety standards, ensuring optimal performance in demanding marine environments. These doors serve as critical components in compartmentalization, providing watertight integrity, fire resistance, and structural reinforcement across vessel types. All units comply with SOLAS Chapter II-2 regulations and classification society requirements (e.g., DNV, ABS, LR), with materials and construction validated through rigorous hydrostatic and fire-testing protocols.

Primary structural components utilize ASTM A36 or A572 Grade 50 steel for frames and leaves, selected for high yield strength (≥250 MPa) and weldability. Aluminum variants (e.g., 5083-H116 or 6061-T6) are employed selectively for non-structural elements where weight reduction is prioritized, maintaining corrosion resistance in saline conditions. Watertight integrity is achieved through precision-machined knife-edge frames engaging elastomeric gaskets, tested to withstand hydrostatic pressures of 0.2–0.5 bar (2–5 m head) without leakage. Fire-rated models (A-0 to A-60) incorporate intumescent seals and insulation layers, certified per IMO FTP Code Annex 1.

Dimensions adhere to ISO 1807 standards, with standard clear openings ranging from 700 × 1,800 mm to 1,000 × 2,100 mm. Custom sizes up to 1,200 × 2,400 mm are feasible, subject to structural validation. Tolerances for frame alignment are maintained within ±1.5 mm over 2 m to ensure gasket compression efficacy. All moving parts—including stainless steel (AISI 316) hinges, dogging mechanisms, and locking bars—undergo salt-spray testing per ASTM B117 (≥500 hours) to guarantee operational reliability. Surface treatment involves abrasive blasting to Sa 2.5 standard and epoxy/polyurethane coating systems (dry film thickness 250–300 μm), compatible with shipyard painting specifications.

The following table summarizes critical technical parameters:

Parameter	Specification Detail	Compliance Standard
Material (Frame/Leaf)	ASTM A36/A572 Steel; Optional 5083/6061 Aluminum for non-structural components	ASTM A6/A6M, AMS 4027
Thickness Range	6–12 mm (varies by class and size; calculated per IACS UR S11)	IACS Unified Requirements
Watertight Pressure	0.2 bar (standard), 0.5 bar (heavy-duty); zero leakage at rated pressure	ISO 14918, MSC.1/Circ.1120
Fire Rating	A-0, A-15, A-30, A-60 (tested per IMO FTP Code Annex 1, Part 2)	IMO FTP Code
Standard Dimensions	Width: 700–1,000 mm; Height: 1,800–2,100 mm (custom sizes available)	ISO 1807
Sealing System	Nitrile rubber (NBR) or EPDM gaskets; knife-edge compression design	ISO 14918
Surface Protection	Epoxy primer + polyurethane topcoat; 250–300 μm DFT	ISO 12944
Operating Temperature	-25°C to +60°C (standard); extended range options available	IMO MSC/Circ.1120

All steel marine doors undergo 100% hydrostatic testing at 1.5× working pressure and dimensional verification prior to export. Hangzhou Star provides full documentation, including Material Test Reports (MTRs), Pressure Test Certificates, and Classification Society Type Approval Certificates, ensuring seamless integration into global shipbuilding projects. Custom engineering solutions are available for specialized vessel applications, subject to technical feasibility assessment.

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Shipbuilding Solutions

Comprehensive Steel Marine Door Solutions for Shipbuilding and Repair by Hangzhou Star Marine Technology

Hangzhou Star Marine Technology Co., Ltd. delivers engineered steel marine door solutions tailored for the demanding requirements of modern shipbuilding and vessel repair operations. As a specialized provider in marine outfittings, we offer a complete end-to-end service that ensures compliance, durability, and operational efficiency across a wide range of vessel types, including cargo ships, offshore support vessels, passenger ferries, and naval craft.

Our steel marine doors are designed and manufactured in strict accordance with international maritime standards, including ISO 13775, IMO A.754(18), and SOLAS regulations. Each door is engineered to provide watertight, fire-rated, or gastight integrity as required by the installation zone, ensuring safety and structural performance under extreme marine conditions. We support both standard and custom configurations, accommodating specific frame dimensions, opening mechanisms, and corrosion protection requirements for integration into new hull designs or retrofit projects.

For shipyards and repair facilities, time is critical. Star Marine offers rapid response times with streamlined project coordination, technical documentation, and global logistics. Our engineering team collaborates directly with naval architects and shipbuilders during the design phase to ensure compatibility with structural layouts and regulatory compliance. For repair and retrofit projects, we provide on-site assessment support, expedited manufacturing, and certified installation guidance to minimize downtime.

We maintain an agile production workflow supported by advanced CNC fabrication, automated welding, and rigorous quality control protocols. All steel marine doors undergo hydrostatic testing, dimensional inspection, and non-destructive testing (NDT) to guarantee performance and long-term reliability. Our supply chain integration allows for fast material sourcing and reduced lead times, ensuring on-schedule delivery for both single-unit replacements and bulk vessel outfittings.

Whether supporting new construction programs or emergency repair operations, Hangzhou Star Marine Technology ensures seamless integration of steel marine doors into the vessel’s safety and access systems. Our commitment to precision engineering, regulatory compliance, and responsive service makes us a trusted partner in global maritime projects.

Key Product Specifications – Steel Marine Door Series

Parameter	Specification
Material	ASTM A36 or equivalent structural steel
Door Types	Watertight, Fire-rated (A-0 to A-60), Gastight
Frame Construction	Welded steel, anti-corrosion primed
Sealing System	EPDM or Neoprene gasket, compression-type
Operation Mechanism	Single or multi-bolt, swing-open (inward/outward)
Fire Rating Compliance	IMO Resolution A.754(18), SOLAS Ch. II-2
Pressure Resistance	Up to 15 kPa (2.17 psi) for watertight variants
Finishing	Epoxy primer, optional anti-fouling coating
Certification	CCS, ABS, DNV, LR, BV (upon request)
Standard Sizes	Customizable; typical range 800x2000mm to 1000x2200mm

With a proven track record in supplying to shipyards across Asia, the Middle East, and Africa, Hangzhou Star Marine Technology continues to set benchmarks in quality and service delivery for marine door systems.

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Packaging & Logistics

Packaging & Logistics Protocol for Steel Marine Doors: Hangzhou Star Marine Technology

Hangzhou Star Marine Technology Co., Ltd. implements rigorous, standardized packaging and logistics procedures for all exported steel marine doors to ensure product integrity, regulatory compliance, and seamless international delivery. As critical marine outfittings designed for demanding vessel environments, these doors require specialized handling from factory to vessel. Our protocols adhere strictly to international maritime shipping standards and destination country requirements, minimizing risk of damage and customs delays.

All steel marine doors are secured within robust, custom-engineered wooden export crates conforming to International Standards for Phytosanitary Measures No. 15 (ISPM 15). This mandatory certification guarantees the wooden packaging material has undergone approved heat treatment (HT) to eliminate pest infestation risks, a non-negotiable requirement for entry into virtually all global ports. Crates are constructed from high-grade, kiln-dried lumber, featuring internal bracing and corner protectors precisely fitted to the door’s dimensions and weight. Critical surfaces are shielded with VCI (Vapor Corrosion Inhibitor) paper, and desiccant packs are included to control internal humidity during extended ocean voyages. For exceptionally heavy or large custom doors, reinforced steel pallet bases may be integrated within the wooden crate structure for enhanced stability during lifting and transit. Alternative packaging utilizing heavy-duty, galvanized steel pallets with welded securing frames is available upon specific client request or for certain project specifications; these pallets feature anti-slip surfaces and corrosion-resistant coatings suitable for marine exposure during handling.

Our primary export hubs are the major deep-water container ports of Ningbo (CNNBO) and Shanghai (CNSHA), both offering extensive global liner services and efficient customs clearance channels for Hangzhou-based exports. Goods are transported from our Hangzhou facility to the port terminal via secure, enclosed trucks under bonded transit. We coordinate closely with pre-vetted international freight forwarders specializing in project cargo and marine equipment, ensuring optimal routing, container selection (typically 20ft or 40ft High Cube), and accurate documentation. All export documentation, including the critical ISPM 15 mark visibly affixed to each wooden crate, commercial invoice, packing list, and certificate of origin, is meticulously prepared to meet destination port authority and carrier stipulations. We strongly advise clients to confirm specific destination port handling capabilities and any local packaging regulations during the order finalization phase. Proactive communication with the consignee regarding shipment tracking and expected arrival windows is standard practice to facilitate smooth discharge and onward movement.

The following table summarizes our standard packaging specifications for steel marine door exports:

Packaging Component	Material & Construction	Treatment/Standard	Typical Dimensions (LxWxH)	Weight Capacity	Key Features
Primary Export Crate	Kiln-dried hardwood lumber	ISPM 15 HT Certified	Custom per door order	Up to 5,000 kg	Internal bracing, corner protectors, VCI paper
Alternative Base	Heavy-gauge galvanized steel	Marine-grade coating	Custom per door order	Up to 8,000 kg	Welded frame, anti-slip surface, corrosion resistant
Internal Protection	VCI paper, foam inserts, straps	ASTM D3951 Level B	N/A	N/A	Non-abrasive, moisture resistant, secure hold
Desiccant	Silica gel packets	MIL-D-3464E	Standard sizes	N/A	Humidity control for transit duration

Hangzhou Star Marine Technology maintains full oversight of the export process from Hangzhou to the port of loading, ensuring our steel marine doors arrive at the vessel in optimal condition, ready for installation and meeting all international shipping prerequisites. We prioritize reliability and compliance as fundamental elements of our export service.

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Contact Star Marine

For marine outfittings that meet the highest international standards in durability, safety, and performance, Hangzhou Star Marine Technology Co., Ltd. stands as a trusted name in the global maritime industry. Specializing in the design, engineering, and export of steel marine doors, we deliver solutions engineered to withstand the harshest marine environments while ensuring compliance with classification societies such as CCS, ABS, DNV, LR, and BV. Our steel marine doors are meticulously fabricated using high-grade marine steel, precision welding techniques, and rigorous quality control protocols to guarantee watertight integrity, fire resistance, and structural reliability across a wide range of vessel types—including cargo ships, offshore platforms, passenger vessels, and naval craft.

At Hangzhou Star Marine Technology, we understand that every vessel project presents unique operational and regulatory challenges. That is why our engineering team works closely with shipyards, naval architects, and marine equipment suppliers to provide customized door solutions tailored to specific舱室 requirements, pressure ratings, fire ratings (A-0, A-15, A-30, A-60), and installation configurations. Whether you require sliding watertight doors, hinged watertight doors, or fire-rated steel doors with insulated cores, our product line supports full integration into modern marine superstructures and hull designs.

To ensure seamless procurement and project coordination, we assign dedicated product managers to support clients from initial inquiry through final delivery. For all inquiries related to our steel marine door series, we recommend direct contact with Kacher YE, Product Manager for Marine Outfittings. Mr. YE brings extensive technical knowledge in marine door systems and export logistics, ensuring accurate specification review, competitive pricing, and timely production scheduling. With years of experience serving clients across Southeast Asia, the Middle East, Europe, and Africa, he is well positioned to assist with technical documentation, certification support, and shipment coordination via FOB, CIF, or DDP terms.

Below are key specifications commonly requested for our standard steel marine door series:

Parameter	Specification
Material	Q235B or equivalent marine-grade steel
Fire Rating	A-0, A-15, A-30, A-60 (per IMO Resolution A.754(18))
Gasket Type	EPDM or silicone rubber, compression-sealing
Operation Mode	Manual lever latch, swing or sliding type
Frame Fixing	Welded or bolted flange mounting
Surface Treatment	Primer coating (epoxy-based), optional topcoat
Applicable Standards	ISO 1751, EN 12067, CCS Technical Rules
Delivery Time	4–6 weeks after order confirmation
Payment Terms	T/T or L/C at sight

For technical consultations, project-specific quotations, or certification documentation, please contact Kacher YE directly at [email protected]. We respond to all inquiries within 12 business hours and provide multilingual support in English, Mandarin, and Arabic. Partner with Hangzhou Star Marine Technology for reliable, code-compliant steel marine doors backed by professional engineering and global export expertise. Your vessel’s safety and integrity start at the door—choose a solution engineered to perform.

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