Doors Supplier in China | Types, Pricing & Technical Specifications

China produces over 35% of global door exports annually, with Guangdong province housing more than 3,000 door manufacturing facilities. Aluminum doors—particularly from Foshan’s industrial cluster—dominate the export market due to standardized production, competitive material sourcing, and established supply chains. This article covers security doors, aluminum doors, interior doors, and entrance doors across pricing, manufacturing, specifications, and procurement data.

1. Security Door Specifications and Pricing

1.1 Aluminum Alloy Grades for Security Doors

Security door manufacturers in China use the following aluminum alloy grades for structural frames:

1.2 Frame Wall Thickness and Anti-Burglary Ratings

1.3 Locking Hardware Brands and Certifications

Security door locks sourced by Chinese suppliers:

• BKV (German): DIN 18251 Class 4 multi-point lock, RC2–RC4 certified, 5-year warranty
• HOPO (Foshan): 3–7 point locking system, CE EN 12209 certified, anti-drill cylinder
• SIEGENIA (German): Premium multi-point mechanism, RC3–RC4, keyed-alike options
• Kin Long (Dongguan): Chinese-manufactured, Intertek-tested, 100,000-cycle durability

1.4 Double Security Doors — Pricing Matrix

2. Aluminum Door Manufacturing Process and Quality Standards

2.1 Raw Material Sourcing and Extrusion

Foshan-based aluminum door manufacturers source primary aluminum billets mainly from:

• Guangdong Jianmei Aluminum: 6063-T5 billets, 99.7% purity, monthly output 50,000 tons
• Asia Aluminum Group (Nanhai): 6061-T6 and 6060-T66 billets, ISO 9001 certified
• Shandong Nanshan Aluminum: Large-diameter billets for heavy profiles

Extrusion lines typically run at 800–2,200 tons press capacity. Profile tolerances follow GB/T 5237 standard (±0.3mm for wall thickness, ±0.5mm for section dimensions). Post-extrusion aging at 185°C for 6 hours achieves T5 temper.

2.2 Surface Treatment and Coating Parameters

2.3 Thermal Break Technology for Aluminum Doors

Thermally broken aluminum doors use polyamide (PA66) insulating strips with 25% glass fiber reinforcement. Strip widths commonly used:

2.4 Quality Testing and Certification Standards

Each batch of aluminum doors from qualified Chinese factories undergoes:

• EN 14351-1: CE marking for external pedestrian doorsets
• NFRC 100/200: Thermal performance rating (U-factor, SHGC)
• AAMA/WDMA/CSA 101/I.S.2/A440: North American standard for windows and doors
• ISO 9001:2015: Quality management system
• Miami-Dade NOA: Florida Building Code compliance for hurricane zones (available on request)
• Water tightness: Class 4A (150 Pa), per EN 12208
• Air permeability: Class 4 (600 Pa), per EN 12207
• Wind load resistance: Class C5 (2,000 Pa), per EN 12210

3. Interior Doors: Design Options and Performance Data

3.1 Interior Door Types and Material Specifications

Chinese interior door manufacturers produce these door categories for global export:

3.2 Hardware Configurations for Interior Doors

3.3 Interior Door MOQ and Packaging

3.4 Fire-Rated Interior Door Options

Fire-rated interior doors are tested to GB 12955-2008 and BS 476-22 standards:

• FD30 (30-minute): 45mm solid core with intumescent strips, $95–160 FOB
• FD60 (60-minute): 54mm mineral core with steel reinforcement, $140–240 FOB
• FD90 (90-minute): 64mm composite core, galvanized steel frame, $200–350 FOB

4. Entrance Door Installation and Technical Requirements

4.1 Pre-Installation Site Preparation

Entrance door installation requires these measurements and preparations:

• Rough opening tolerance: +10mm width, +15mm height beyond frame dimensions
• Sill/threshold preparation: Level surface, max 2mm deviation across 1m. Use polymer-modified mortar for masonry substrates, aluminum sill with thermal break for timber-frame construction
• Structural anchoring: Minimum 6 anchor points per jamb (150mm from corners, ≤600mm spacing)
• Required tools: Laser level (≤1mm/m accuracy), 6mm masonry drill bit, M8×80mm stainless steel frame fixings, low-expansion PU foam (Sika Boom or equivalent), EPDM compression seal

4.2 Step-by-Step Installation Sequence

1. Frame positioning: Insert frame into rough opening. Use plastic packers at 300mm intervals. Check plumb (vertical) and level (horizontal) with laser. Adjust packers until square tolerance is within 1.5mm per meter.
2. Anchoring: Pre-drill through frame anchor holes into substrate. Insert M8 stainless steel frame fixings (minimum embedment 60mm into concrete/brick). Torque to 15–18 N·m. Do not over-tighten — this can deform the aluminum frame.
3. Hanging the leaf: Mount hinges to frame first, then attach door leaf. Adjust each hinge’s 3-axis screw (height ±3mm, lateral ±2mm, compression ±1.5mm) until the leaf has a uniform 3mm gap on all sides.
4. Weather sealing: Apply continuous EPDM gasket around the frame-leaf interface. Install bottom sweep seal (adjustable drop-down type) on the door bottom. Check compression: seal should compress 25–30% when door closes.
5. Foam insulation: Fill the 10–15mm gap between frame and rough opening with low-expansion PU foam. Apply in 3 stages (bottom third, middle third, top third) allowing 10 minutes between layers. After curing (2 hours), trim excess foam flush.
6. Hardware installation: Mount lock body, cylinder, handle, and strike plate. Test locking mechanism — all bolts must fully extend and retract without friction. Adjust strike plate position if needed.
7. Final sealing: Apply exterior-grade silicone sealant (neutral cure, UV-resistant) at the frame-to-wall junction on the exterior side. Tool the bead to a concave profile for water shedding.

4.3 Common Installation Defects and Corrections

4.4 Entrance Door Maintenance Schedule

5. Procurement Data and Supply Chain Overview

5.1 Order Quantities, Lead Times, and Payment Terms

5.2 Sample Policy and Quality Assurance

• Sample cost: 1.5× unit FOB price for custom samples. Refundable on first container order exceeding $30,000.
• Sample lead time: 7–12 working days for standard; 15–20 days for custom design.
• Quality inspection: 100% pre-shipment inspection at factory. Third-party inspection (SGS, Bureau Veritas, TUV) available at buyer’s cost ($350–500 per man-day).
• Warranty: 5 years on aluminum frame structure, 2 years on hardware and glass units, 1 year on surface finish against peeling, cracking, or fading exceeding ΔE 5 (ASTM D2244).

5.3 Shipping and Packaging Specifications

6. Door Performance Comparison: Configurations by Application

6.1 Exterior vs Interior Door Performance Data

6.2 Regional Market Preferences and Specification Differences

7. Factory Audit Essentials and Supplier Evaluation

7.1 Evaluating Door Manufacturers in China

Key indicators for assessing a Chinese door manufacturer:

• Annual export volume: ≥$2 million suggests established international operations
• Production floor area: ≥10,000m² for comprehensive in-house capability (extrusion, fabrication, assembly)
• CNC machining centers: Elumatec or Emmegi 4-axis CNC for precise corner crimping and routing
• Double-head miter saw: For 45° corner cutting with ±0.2mm accuracy
• Corner crimping machine: Hydraulic, 4-corner simultaneous crimp with pressure monitoring
• Testing lab in-house: Air/water/wind test rig per EN 14351-1, thermal chamber, cycle test fixture
• Certifications on file: ISO 9001 (minimum), CE for EU market, NFRC for NA

7.2 Project Case Data: Residential Development, Dubai

For aluminum door procurement inquiries, contact ROGENILAN Doors Collection for catalog requests. Technical specification sheets and sample ordering available through the supplier inquiry page. Browse additional aluminum door configurations at Exterior Doors Product Line.