In modern physical security, the entryway is no longer just a partition. It is a complex security boundary. Today's commercial buildings, high-end residences, and industrial sites face advanced physical threats, varying climates, and strict regional safety building codes. This has driven the demand for high-performance stainless steel security doors to record highs globally.
As a leading CE-certified factory, Zhejiang Larsom Door Co., Ltd. addresses this need. We engineer doors using premium-grade 304 and 316 stainless steel alloys. These materials are chosen for their high tensile strength, resistance to cutting and impact, and natural corrosion protection. By securing CE certification (Conformité Européenne), our engineering processes meet the stringent requirements of EU Directive 305/2011 (Construction Products Regulation), providing architects and developers with reliable performance, long-term durability, and structural safety.
Zhejiang Larsom Door Co., Ltd. is a professional manufacturer specializing in the research, development, production, and global sales of high-quality security doors, armored doors, steel-wood doors, and customized entrance door solutions.
Since its establishment, Larsom Door has been committed to providing customers around the world with safe, durable, and stylish door products. Today, the company operates a modern manufacturing facility covering more than 16,000 square meters, supported by an experienced team of over 160 skilled employees. With advanced production management and efficient manufacturing systems, our daily production capacity exceeds 200 sets of premium doors, enabling us to meet both large-scale projects and customized orders with reliable delivery.
To continuously improve product quality and manufacturing efficiency, Larsom Door has invested heavily in advanced automated production equipment, including CNC laser cutting machines, CNC bending machines, automatic welding systems, high-speed turret punching machines, automatic sanding machines, and modern powder coating production lines. These advanced facilities, combined with strict quality control procedures, ensure that every door meets international quality standards.
Our stainless steel security doors are built to protect against forced entry, environmental wear, and structural degradation. Below are the key technical parameters for our CE-certified security doors:
| Parameter / Property | Standard Specification Range | Testing Methodology / Classification |
|---|---|---|
| Base Metal Material | Grade SUS304 / SUS316 High-Tensile Stainless Steel | ASTM A240 / EN 10088-2 Compliance |
| Core Infill Density | Rockwool (120kg/m³), Honeycomb, Polyurethane, or Custom Armored Plate | BS EN 1363-1 (Thermal insulation and structural stability) |
| Forced Entry Resistance | RC2, RC3, RC4 (Resistance Class classifications) | EN 1627:2011 / EN 1630 (Static load, dynamic load, manual burglary tests) |
| Corrosion Resistance Class | Class 4 & Class 5 (High/Very High exposure rating) | EN 1670 (Salt spray chamber testing for durability) |
| Acoustic Performance | 35 dB - 48 dB (Decibel reduction configuration) | ISO 10140-2 / ISO 717-1 Acoustic insulation rating |
| Fire-Resistant Durability | EI30, EI60, EI90, EI120 (Integrity and insulation) | EN 1634-1 / BS 476-22 Fire safety approvals |
Every door undergoes a structured quality-assurance workflow to ensure precise dimensions and reliable mechanical assembly.
Different architectural environments demand tailored security solutions. Zhejiang Larsom Door Co., Ltd. designs and manufactures security doors optimized for specific projects.
Combining luxury finishes, such as copper-plating, solid wood panels, and natural rift-cut oak veneers, with armored multi-point locking mechanisms to protect residential villas.
Featuring large-format aluminum alloy pivot systems, slim-frame glass integrations, and concealed self-closing hinges. These configurations are designed to handle high foot traffic while maintaining a clean look.
Constructed from reinforced double-skin stainless steel panels. These doors are filled with dense sound-dampening, fire-retardant materials to protect military, financial, and industrial facilities.
Zhejiang Larsom Door Co., Ltd. exports high-performance physical barrier solutions to over 130 countries and regions. We supply real estate developers, commercial contractors, public infrastructure engineers, and regional importers with products tailored to their local climates and building codes.
Our export divisions coordinate logistics, supply certificate-of-origin documentation, and ensure import compliance for markets in Europe, the Middle East, South America, and Southeast Asia. We also support OEM/ODM partnerships, enabling customizable dimensions, locks, and finishes while maintaining our quality standards.
All structural components are manufactured under ISO 9001:2015 quality guidelines. This ensures that raw materials, weld integrity, and lock mechanics are inspected at every phase of production.
The security door sector is shifting toward smart, energy-efficient, and sustainable solutions. Our research and development focuses on three primary areas:
We are developing advanced thermal break stainless steel door frames. These systems isolate the interior face from exterior temperatures, preventing condensation and helping buildings meet energy efficiency standards.
Our new door systems support biometric entry, facial recognition scanners, smart home systems, and remote access APIs, combining high physical security with convenient modern control options.
By optimizing our processes, using recycled alloys, and applying zero-VOC powder coatings, we are reducing our environmental footprint to support green building projects globally.
A CE certified security door complies with European standards for construction products (CPR 305/2011/EU). It is evaluated for mechanical strength, wind load resistance, air permeability, thermal transmittance (U-value), and fire performance under harmonized standards such as EN 14351-1 (for external pedestrian doorsets) or EN 16034 (for fire and smoke control configurations).
For coastal regions, offshore installations, or industrial areas with high pollution, Grade 316 stainless steel is highly recommended. Unlike standard Grade 304, Grade 316 contains 2-3% molybdenum. This addition improves its resistance to chlorides and salt spray, preventing pitting and surface rust.
RC classifications are determined by tests defined in European standards EN 1627 through EN 1630. To achieve RC3 or RC4, a security door must resist simulated manual forced-entry attempts using crowbars, hammers, chisels, and power drills for specific, regulated times. These performance ratings require a rigid structural design, thick internal reinforcing ribs, and multi-point lock systems.
We choose core materials based on project specifications. Rockwool is selected for fire-rated installations because of its heat resistance. Polyurethane foam is used for thermal insulation, and structured paper honeycomb is selected for lightweight interior partitions. High-security doors also feature internal steel plates for added drill resistance.
Yes, we specialize in high-capacity pivot entry systems. These doors use heavy-duty floor pivots that can support assemblies weighing over 500 kg. This allows for large, statement entrance designs while maintaining smooth manual operation.
Our daily capacity exceeds 200 custom sets. For standard large-volume commercial projects, lead times range between 25 to 40 days, depending on material specifications, custom sizing, finish requirements, and shipping schedules.
All products are packed using multi-layer PE foam, corner protectors, and heavy corrugated cartons. For LCL or long-distance ocean shipping, we package units in custom-built wooden crates to prevent movement and damage during transport.
Larsom Door
