Steel Door Manufacturer Direct From Factory
Factory-direct steel doors — 18+ years of manufacturing, 12 product variants, shipped to 5 continents.
From standard interior panels to heavy industrial steel doors, EUWOO's 18,000 m² facility runs 6 dedicated production lines with 450,000 units annual capacity. Every door is manufactured in-house, inspected 100% before shipment, and documented for customs clearance in your market.
What We Manufacture and How the Supply Chain Works
EUWOO is the export brand of Luoyang Huahui Door Industry Co., Ltd., a steel door manufacturer operating out of Luoyang Industrial Park, Henan, China since 2008. This page covers our steel door category specifically — if you're sourcing fire-rated or security doors, those run on separate certified lines and have their own category pages.
We are a factory. Every steel door that ships under the EUWOO name is cut, formed, welded, coated, and assembled in our own 18,000 m² facility. There is no trading company in the chain — your price is the manufacturer's price, your spec goes directly to the production floor, and your quality questions get answered by the people who built the door.
That distinction matters most when you're managing a large project order or building a private-label product line where consistency across batches is non-negotiable.
Learn more about EUWOO's factory and manufacturing history
Distributors
Stocking a catalog for resale — consistent batch quality across reorders.
Contractors
Sourcing for construction projects — spec-matched supply with export documentation.
Importers / OEM
Building private-label programs — factory floor to container, no intermediary.
Steel Door Product Line
Twelve product variants organized by application and construction type. Each links to a dedicated product page with full specifications, customization options, and configuration details.
Standard & Architectural Steel Doors
Steel Door
Core CatalogThe core catalog product. Cold-rolled SPCC body, 1.0–1.2mm gauge, available in single and double leaf configurations. The starting point for most distributor stocking programs.
6 Panel Steel Door
ArchitecturalRaised six-panel profile pressed into the door face, giving a traditional architectural appearance on a steel substrate. Moves well in North American residential and light commercial distribution channels where the wood-door aesthetic is expected but the durability of steel is required.
Glass Steel Door
Vision PanelSteel door body with integrated glazing lite — vision panel sizes from 200×400mm up to full-length sidelite configurations. The steel frame carries the structural load; the glass insert is tempered as standard. Common in office corridors and commercial lobbies where visibility between spaces is a code or design requirement.
Iron Door
OrnamentalOrnamental wrought iron construction, typically used for main entrance applications where the aesthetic is the primary specification. We fabricate the iron scrollwork and panel inserts in-house, which keeps the tolerances tight enough for consistent frame fit across a production run. Most ornamental iron doors in the market are assembled from sourced components — ours are fabricated on our own floor, which is why the frame-to-leaf fit is consistent.
Industrial Steel Door
Built for manufacturing plants, logistics facilities, and utility spaces where the door takes daily abuse. Heavier gauge body (1.5mm standard, 2.0mm available), reinforced internal stiffener channels, and hardware rated for high-cycle use.
The hinge spec on these is a 3-hinge heavy-duty weld-in, not the standard 2-hinge butt configuration — it matters on doors that open and close hundreds of times a day.
Warehouse Steel Door
Optimized for loading dock and warehouse perimeter applications. Wide-opening configurations, threshold options for forklift clearance, and hardware packages suited to high-frequency operation.
Container loading efficiency on these is lower than standard doors due to size, so we quote freight separately for large warehouse door orders.
Steel Grill Door
Open steel grill construction — ventilation and visibility without a solid panel. Used in utility rooms, storage cages, and commercial back-of-house applications where airflow is required.
The grill pattern is welded, not expanded mesh, so the joints are structurally sound under lateral load.
Interior & Office Steel Doors
Interior Steel Door
Lighter-duty construction for internal partitions and corridor applications where exterior weather resistance isn't a factor. Standard 1.0mm body, honeycomb or mineral wool core options, available in flush and embossed panel profiles.
View SpecsInterior vs. Exterior Spec
Interior doors drop the weather seal, threshold, and exterior-grade hardware — which reduces unit cost and weight. If your project spec calls for fire rating on interior corridors, confirm the core option (mineral wool) at order time. Honeycomb core does not carry a fire rating.
Core options and fire-rating availability vary by door variant. Contact us to confirm compliance requirements before specifying.
Office Steel Door
Interior steel door configured for office environments — flush face, concealed hinge options, and hardware packages that include mortise lock prep and door closer reinforcement. The finish spec on office doors runs to a finer powder coat surface than our industrial line — buyers in this segment care about the visual quality in a way that warehouse buyers don't.
Residential Steel Door
Steel door built to residential proportions and aesthetic expectations. Standard sizes align with North American and European residential rough openings. Insulated core (polyurethane foam fill) for thermal performance, weatherstrip on all four sides. Distributors supplying residential builders or home improvement channels are the primary buyer for this variant.
Stainless Steel Door
304 or 316 stainless steel construction for environments where corrosion resistance is the primary specification: food processing facilities, pharmaceutical plants, coastal installations, and hospital corridors. No powder coat — the stainless surface is brushed or mirror-polished. 316 grade is the spec for marine and chemical exposure environments; 304 covers most food and medical applications.
Steel Door Frame
Frames manufactured to match our door leaf dimensions, or custom-fabricated to your rough opening spec. Cold-rolled steel, welded corner construction, available in knock-down (KD) or welded configurations. Sourcing frames from the same manufacturer as the door leaf eliminates the tolerance mismatch that causes field fit problems — the frame and leaf are dimensioned against the same master template.
12 Steel Door Variants. One Factory Source.
Every variant in this product line ships from the same manufacturing facility under the same quality system. Mixed-variant orders consolidate into a single container, a single inspection, and a single point of contact — reducing the supplier coordination overhead that erodes margin on multi-SKU projects.
Browse All Steel Door ProductsSteel Door Specifications: Category-Wide Parameter Ranges
These are the general parameter ranges across the steel door category. Individual product pages carry the exact specifications for each variant.
| Parameter | Standard Range | Notes |
|---|---|---|
| Body material | SPCC cold-rolled steel / 304 or 316 stainless | Stainless for corrosive environments |
| Body gauge | 1.0–1.2mm standard; 1.5–2.0mm heavy duty | Heavier gauge on industrial and security variants |
| Door leaf thickness | 40–60mm | Core type affects thermal and acoustic performance |
| Core options | Honeycomb paper, mineral wool, polyurethane foam | PU foam for thermal; mineral wool for acoustic/fire |
| Standard door sizes | W600–1200mm × H1800–2400mm | Custom sizes available outside this range |
| Frame material | Cold-rolled steel, 1.5–2.0mm | KD or welded corner construction |
| Frame profile | 100–160mm wall depth | Matched to door leaf gauge |
| Surface finish | Powder coat (60–80μm), brushed stainless, mirror polish | Powder coat: 500-hour salt spray rated |
| Color options | 60+ standard colors (RAL system) | Custom colors on runs ≥100 units |
| Hardware prep | Hinge, lock, closer, viewer cutouts | Pre-drilled and reinforced at factory |
| Certifications | ISO 9001:2015 CE SGS NFPA 80 | Applicable certifications vary by product variant |
| MOQ | 50 units (standard); 100 units (custom) | |
| Lead time | 25–35 days (standard catalog orders) | Custom orders quoted individually |
Core Selection Guide
PU foam cores deliver the best thermal performance for climate-controlled environments. Mineral wool cores are the correct choice when acoustic attenuation or fire-resistance ratings are required. Honeycomb paper suits standard interior applications where neither thermal nor acoustic performance is a primary spec.
Gauge Selection by Application
1.0–1.2mm body gauge covers the majority of commercial and residential applications. Step up to 1.5–2.0mm for industrial, warehouse, or high-security contexts where impact resistance and forced-entry deterrence are part of the specification. Frame gauge is always matched to door leaf gauge.
Finish and Color Logistics
60+ RAL standard colors ship from stock powder coat inventory. Custom RAL colors require a minimum run of 100 units and are quoted individually. Stainless variants ship in brushed or mirror-polish finish — no powder coat applied unless specifically requested for a hybrid finish specification.
How We Build Steel Doors: The Manufacturing Process
From SPCC coil to outgoing inspection — every stage is controlled to tolerance. Here is what that looks like in practice.
Material Intake and Coil Inspection
The process starts with SPCC cold-rolled steel coil from approved mills. Incoming gauge checks run on every coil before it enters the cutting line. Coils outside tolerance spec are rejected — even when lead times are tight. This is a non-negotiable gate, not a statistical sample.
CNC Laser Cutting — ±0.5mm Tolerance
CNC laser cutting blanks door panels and frame components to ±0.5mm dimensional tolerance. That precision at the blank stage is what makes frame-to-leaf fit consistent in the field. If you are loose at the cutting stage, you are chasing fit problems all the way through assembly and into installation.
CNC Press Brake Forming
CNC press brake forming shapes door panels, frame sections, and internal reinforcement channels. Consistent bend geometry across the run means every unit enters assembly with the same dimensional baseline — no manual correction required at the fit-up stage.
Robotic MIG Welding — Standard Production
Standard production lines use robotic MIG welding for door body assembly. Consistent weld penetration across long runs means your 500th door is dimensionally identical to your first. Custom profiles and architectural finishes go to manual TIG welding stations where the weld bead can be dressed to a cleaner surface finish.
Zinc Phosphate Pre-Treatment
Before any coating, every door body goes through a zinc phosphate pre-treatment bath. The switch from iron phosphate to zinc phosphate came in 2020 after adhesion failures on orders going to coastal markets. Zinc phosphate builds corrosion resistance at the substrate level — before the powder goes on. That is the correct sequence for coastal and high-humidity installations.
Electrostatic Powder Coating — 60–80μm
The automated electrostatic powder coating line applies 60–80μm film thickness across the full panel surface, cured in a convection oven. That thickness spec passes a 500-hour salt spray test — the threshold most North American and European buyers require for coastal and high-humidity installations.
Final Assembly and 100% Outgoing Inspection
Final assembly stations fit the door leaf to its frame, cycle all hardware, and check squareness and gap consistency. Every unit goes through this check — 100% outgoing inspection, no statistical sampling. Doors that fail at any stage do not get patched and shipped. They go back to the relevant process step. That policy is what keeps field failure rates low across high-volume distributor accounts.
Selecting the Right Steel Door Variant for Your Market
The most common sourcing mistake is defaulting to a single spec across an entire product line when the market actually needs two or three distinct configurations. Here is how to match variant to channel.
Residential & 6-Panel Steel Door
The volume movers for North American and Australian residential channels. The six-panel profile is the aesthetic standard in these markets. Insulated core is a selling point wherever heating and cooling costs are a buyer concern.
Flush Steel Door + Steel Door Frames
The flush configuration fits standard commercial rough openings, accepts a mortise lock prep, and prices competitively. Pairing with frames from the same production run eliminates the dimensional fit problems that arise when door and frame come from different sources.
Industrial Steel Door — 1.5mm Gauge
Standard 1.0mm spec is adequate for office and residential use but shows denting and hinge wear in high-cycle industrial environments within 2–3 years. The 1.5mm minimum body gauge costs more per unit but eliminates warranty claims and replacement orders from downstream customers.
Stainless Steel Door — 304 or 316
Powder-coated carbon steel in a food processing environment will show corrosion at cut edges and hardware penetrations within 18 months regardless of coating quality. Stainless is the only defensible specification for these environments.
Iron Door & Glass Steel Door — Visual Statement at the Entrance
Iron Door carries a premium price point that supports higher margin in residential and hospitality channels. The aesthetic positions well at the top of a product line where buyers are willing to pay for visual differentiation.
Iron DoorGlass Steel Door is the commercial specification — office lobbies, hotel corridors, institutional buildings where the architect wants visibility without sacrificing the steel frame's structural integrity.
Glass Steel DoorWhat Goes Wrong with Steel Doors in the Field — and How We Engineer Against It
Most supplier websites skip this section. The failure modes are predictable, and our manufacturing decisions are specifically designed around them.
Powder Coat Delamination at Weld Seams
The most common finish failure on steel doors. Weld seams create surface irregularities and heat-affected zones where powder coat adhesion is weakest.
How We Engineer Against It
Every weld seam is ground and dressed before pre-treatment. The zinc phosphate bath reaches into the seam geometry in a way that iron phosphate cannot — producing consistent adhesion across the full panel surface, including at every weld joint. Buyers who have had delamination problems with other suppliers typically see this resolved immediately on switching.
Frame-to-Leaf Dimensional Mismatch
A field installation problem that originates in the factory. When door leaves and frames are manufactured to different dimensional references — from different suppliers or from the same supplier running loose tolerances — gap consistency around the perimeter is uneven. Installers compensate with shims and filler, adding labor cost and producing poor results.
How We Engineer Against It
CNC cutting holds ±0.5mm on both leaf and frame components against the same master template. The gap is consistent before the door leaves the facility.
Hinge Failure on High-Cycle Doors
Standard 2-hinge butt configurations are adequate for residential and light commercial use — typically rated to 250,000–500,000 cycles. Industrial and warehouse doors in active facilities can exceed that in 2–3 years.
How We Engineer Against It
3-hinge heavy-duty weld-in hinges on the industrial line, rated to 1,000,000+ cycles. The hinge reinforcement plate is welded into the door body — not screwed through the skin. Hinge replacement cost and downtime on a failed door in an active warehouse far exceeds the upfront spec upgrade.
Edge Corrosion on Cut Panels
Cut steel edges are the most vulnerable point on any powder-coated door. The coating is thinnest at the edge geometry, and if pre-treatment does not reach the edge properly, corrosion starts there first — regardless of how well the flat panel surfaces are coated.
How We Engineer Against It
Edge coverage is a specific inspection point on the powder coat line. Film thickness is checked at panel edges, not just flat surfaces. Doors that show thin edge coverage go back to the coating line before they reach assembly.
Spec the Right Door Before the First Order
Every failure mode above is preventable at the specification stage. Our technical team can review your application requirements and confirm the correct gauge, hinge configuration, finish spec, and frame pairing before you commit to an order.
OEM and Private-Label Steel Door Programs
Custom development is a core part of our business, not an exception. Our in-house R&D team of 15 engineers handles everything from initial spec review to 3D rendering, prototype approval, and production sign-off — at no charge for the design consultation phase.
How the Engagement Works
For distributors building a private-label steel door line, the typical engagement starts with you sending us your target spec, a reference product, or a description of your market's requirements. Our engineers review it for manufacturability and cost, and come back with a 3D rendering and a detailed quote.
From spec submission to first sample is 15–20 working days depending on complexity. We can also suggest configurations based on order patterns we see across our existing distributor network — if you're entering the North American residential market, for example, we have a clear read on which profiles and hardware packages are moving.
Program at a Glance
What OEM Private-Label Covers
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Your brand, your packaging — available on both standard catalog and fully custom configurations
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3D rendering provided before any tooling commitment — review and approve before production begins
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Market-informed configuration suggestions based on order patterns across our distributor network
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Full R&D team of 15 engineers from spec review through production sign-off
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Trial order at 50 units (standard) before committing to a full stocking program
Container Loading and Export Logistics
Standard steel doors ship in flat-pack KD (knock-down) format — door leaf, frame sections, and hardware packed separately in reinforced cartons. We provide exact loading data with every quote so your freight team can calculate landed cost accurately.
Standard Steel Doors
Flat-pack KD format — door leaf, frame sections, and hardware packed separately in reinforced cartons.
Stainless & Ornamental Iron
Ship in foam-lined protective crates with corner guards — the surface finish on these products requires more protection than standard powder-coated doors.
Industrial & Warehouse Doors
Larger sizes may require flat-rack container arrangements. We flag this at the quoting stage so there are no freight surprises.
Batch Traceability & Quality Assurance
Every carton carries a barcode linked to our production batch record. If there's a quality question on arrival, you can trace the unit back to its production date, line, and inspection record within minutes — useful for import compliance documentation and for resolving any port-of-entry inspection queries.
Active Export Markets
Documentation package clears customs in all of these markets without supplementary paperwork.
Market Segments Where Steel Doors Generate Repeatable Volume
Steel doors are not a single-segment product. The buyers who build the most durable distribution businesses in this category typically cover two or three of these segments simultaneously, which is why product line breadth matters when you're evaluating a supplier.
Commercial Construction Supply
General contractors and building material distributors supplying commercial construction projects — office buildings, retail, hospitality, institutional. Standard flush steel doors in volume, typically ordered per-project with tight delivery windows.
Primary SKUs
Industrial and Logistics Facilities
Manufacturing plants, warehouses, distribution centers, and utility buildings. High-cycle, heavy-gauge specification. Repeat orders as facilities expand or replace worn doors. This segment has grown significantly over the past three years — driven by logistics facility construction in Southeast Asia and the Gulf — and it's worth building into your product line if you're not already there.
Primary SKUs
Residential and Light Commercial Distribution
Hardware chains, building material distributors, and home improvement channels supplying residential builders and renovation contractors. North American and Australian markets are the primary buyers in this segment.
Primary SKUs
Specialty and High-Specification Projects
Food processing, pharmaceutical, marine, and high-security applications requiring stainless steel or heavy-duty construction. Lower volume per order but higher margin and less price competition.
Primary SKUs
Architectural and Entrance Applications
Hospitality, high-end residential, and institutional projects where the door is a design element, not just a functional component. Margins are higher; order volumes are smaller; buyers in this segment are less price-sensitive and more specification-sensitive.
Primary SKUs
Why Multi-Segment Coverage Builds Durable Volume
The most resilient distributors in this category don't rely on a single segment. Commercial construction is cyclical. Industrial and logistics demand has been the strongest growth driver over the past three years. Residential provides steady baseline volume. Specialty and architectural segments protect margin when commodity pricing compresses.
Covering two or three segments with a coherent product line — rather than chasing every segment with a fragmented SKU list — is the pattern we see in the most successful distribution relationships we support.
Frequently Asked Questions
Specification and sourcing questions answered directly — gauge selection, core materials, performance trade-offs, and procurement decisions for commercial and industrial buyers.
What steel gauge should I specify for commercial vs. industrial steel doors?
For standard commercial applications — office buildings, retail, light institutional — 1.0–1.2mm SPCC cold-rolled steel is the correct spec. It handles normal traffic loads, takes hardware well, and keeps the door weight manageable for standard closer and hinge configurations.
For industrial environments — manufacturing plants, warehouses, logistics facilities with forklift traffic and high-cycle operation — specify 1.5mm minimum, with 2.0mm available for the highest-abuse applications.
1.0–1.2mm SPCC
Office, retail, light institutional. Standard closer and hinge configurations. Manageable door weight.
1.5mm–2.0mm
Manufacturing, warehouses, forklift traffic, high-cycle operation. 2.0mm for highest-abuse applications.
The gauge difference is visible in the field within 2–3 years: 1.0mm industrial doors show denting and hinge wear; 1.5mm doors don't. The upfront cost difference is modest; the downstream warranty and replacement cost difference is significant.
What is the difference between honeycomb, mineral wool, and polyurethane foam core steel doors?
Core selection drives three performance variables: thermal insulation, acoustic performance, and fire resistance.
Honeycomb Paper
Lightest and least expensive option.
- Interior partitions
- No thermal requirement
- No acoustic requirement
Mineral Wool
Best acoustic performance; non-combustible.
- Best acoustic rating
- Fire-rated construction
- Not primary thermal spec
Polyurethane Foam
Best thermal insulation; standard for exterior.
- Best thermal insulation
- Exterior door standard
- Residential steel doors
If your buyers are in markets with strict energy codes or acoustic requirements, specify accordingly — the core upgrade cost is small relative to the performance difference.
Q How do I prevent steel door corrosion in coastal or high-humidity markets?
Two decisions determine corrosion performance: pre-treatment chemistry and coating thickness.
Iron phosphate pre-treatment is adequate for dry inland environments. It provides baseline corrosion resistance at the substrate level before powder coat application.
Zinc phosphate pre-treatment is required. It builds corrosion resistance at the substrate level before the powder coat goes on — iron phosphate is not sufficient for these environments.
Coating Thickness Requirement
Coating thickness should be 60–80μm minimum. Thinner coatings below 50μm fail salt spray testing at the 300-hour mark — insufficient for coastal installations. Our standard powder coat line passes 500-hour salt spray testing, which covers most commercial coastal applications.
Most Demanding Environments
For marine, food processing, and chemical exposure applications — powder-coated carbon steel is not the right specification regardless of pre-treatment quality. Specify 304 or 316 stainless steel instead. See our stainless steel door product line for these environments.
Q What certifications are required to import steel doors into North America and the EU?
Certification requirements differ by market and application type. The table below maps the key requirements to what EUWOO holds.
| Market | Application | Required Certification | EUWOO Status |
|---|---|---|---|
| US | Commercial construction | ANSI/SDI standards for steel door construction | Compliant |
| US | Fire-rated steel doors | NFPA 80 certification | Certified — Held |
| EU | Regulated construction products | CE marking | Certified — Held |
| US & EU | General commercial (non-fire-rated) | ISO 9001:2015 + SGS third-party audit | Both Held |
For general commercial steel doors (non-fire-rated) in both markets, ISO 9001:2015 and SGS third-party audit documentation are typically sufficient for import compliance and buyer qualification. We can provide SGS audit reports on request for buyers who need third-party documentation for their own import files.
What is the MOQ for a custom steel door design, and what does the development process look like?
Custom steel door designs start at 100 units MOQ — that's where the powder line changeover and any tooling cost makes sense for both sides. Standard catalog models are available from 50 units. The development process: you send us your target spec, a reference product, or a description of your market's requirements. Our engineering team reviews it for manufacturability and cost, and returns a 3D rendering and detailed quote — no charge for the design consultation. From spec submission to first sample is 15–20 working days depending on complexity. Production lead time after sample approval is 25–35 days for most configurations.
How many steel doors fit in a 40HQ container, and how are they packed?
Standard single-leaf steel doors (W900×H2100mm) in KD flat-pack format load at approximately 200–280 sets per 40HQ container, depending on door thickness and hardware configuration. KD format means door leaf, frame sections, and hardware are packed separately in reinforced cartons — this maximizes container utilization and protects the door surface during transit. Double-leaf doors and oversized configurations load at lower quantities; we provide exact loading data with every quote. Stainless steel and ornamental iron doors ship in foam-lined protective crates due to surface finish requirements, which reduces loading density — factor this into your freight cost calculation when comparing these variants.
Ready to Source Steel Doors Direct From Factory?
ISO 9001:2015, CE, SGS & NFPA 80 certified. 450,000 units/year capacity. 12 product variants. Request a quote or contact our export team directly.