Factory Strength
Featured System
Global Project Support
Supports design detailing and OEM/ODM customization services.
From sample confirmation to bulk delivery, we help make engineering procurement and installation more efficient.
FOB/CIF/DDP multiple delivery methods, covering major global ports.
The product is a 55-series single-open aluminum alloy window, with a reference configur…
Learn More
This 80-series single-opening aluminum alloy window uses 6063-T5 aluminum alloy profile…
Learn More
This product is an 80 series thickened single-opening aluminum alloy window, with refer…
Learn More
This product is a 90 series single-opening aluminum alloy window, made of 6063-T5 alumi…
Learn More
This product is a 90-series thickened single-open aluminum alloy window, with a referen…
Learn More
This 93 series single-opening aluminum alloy window is specially designed for overseas…
Learn MoreCustomer Solutions
Don't know how to choose when replacing windows for the first time? Worried about quality and installation issues?
Offline 2,000m² Showroom with video viewing, on-site consultation, and scheme comparison.
One-on-one follow-up by our business team, providing full guidance from dimension measurement to scheme confirmation, so you can buy with clarity and install with peace of mind.
| Comparison Dimension | Regular Trading Supplier | Qinhan System Windows & Doors |
|---|---|---|
| Factory Capability | Tends towards order transfer and inquiries, with production details being uncontrollable. | Owns processing, manufacturing, and sample display, making product structure, craftsmanship, and delivery schedule more controllable. |
| Solution Confirmation | Only quotes based on model number, easily overlooking project conditions. | First, review drawings, dimensions, opening methods, performance targets, and application scenarios. |
| Configuration Support | Profiles, glass, hardware, colors, and packaging confirmed separately. | Profiles, glass, hardware, colors, packaging, and documentation confirmed simultaneously. |
| Delivery Follow-up | Issues are temporarily transferred, making information prone to gaps. | Business, technology, production, and quality control are divided and followed up, making the milestones clearer. |
| Export Support | Packaging, documentation, and after-sales coordination are unstable. | Supports export packaging, documentation synchronization, sample prototyping, and OEM/ODM customization. |
We will fully present our door and window factory's product types, profile structures, performance configurations, production processes, quality inspection milestones, and export coordination to help you determine if the product matches your project requirements before inquiry.
Procurement Confirmation Path
20 Years
of door and window manufacturing experience
System Windows · Sliding Doors · Curtain Walls
12,000m²
production base
Integrated processing and manufacturing
2,000m²
sample showroom
System window and profile display
OEM/ODM
customization support
Color · Hardware · Packaging · Materials
About Us
We are an aluminum alloy door and window factory with 20 years of manufacturing experience, located in Shaanxi Province, China. We do not subcontract orders. Every window is completed in our own workshop, from aluminum alloy profile testing, precision CNC cutting, whole window assembly, to finished product inspection.
Export quality complies with the EN 14351-1 standard, covering thermal break windows, heavy-duty sliding doors, curtain walls, and facade supporting products. We use project drawings, profile samples, glass configurations, hardware solutions, and packaging requirements as the basis for communication, helping clients clarify product direction, performance boundaries, and delivery conditions before inquiry.
From sample procurement, small-batch trial orders to project bulk supply—Qinhan provides stable OEM/ODM customization support for global engineering contractors, distribution channels, and door and window brands.
20
Years of manufacturing experience
Performance Indicators
1.1W/m²K
Heat Transfer Coefficient
Complies with EN 14351-1
45dB
Sound Insulation Rating
Rw + Ctr combined configuration
2400Pa
Wind Pressure Resistance
Suitable for high-rise and strong wind environments
70-120mm
Frame Depth
93 Series Thermal Break Structure
10 Years
Seal Lifespan
EPDM Sealing System
50+
Projects Covered
Countries & Regions Served
Factory
12,000m²
production base
2,000m²
Showroom
20 Years
Design Team
The factory will clearly break down product configurations, performance requirements, packaging methods, and delivery timelines in advance.
Reduce time loss from repeated confirmations in overseas projects
Mass production after sample confirmation
Key milestones include profile processing, machining, corner assembly, glass configuration, finished product inspection, and export packaging.
01
Testing Aluminum Profile Production & Selection02
Processing CNC Cutting & Machining03
Assembly Window Assembly & QC04
Customization OEM / ODM Support05
Documents Engineering Files & Node Diagrams06
Delivery FOB / CIF / DDPFrom initial drawing communication to final pre-shipment review, customers can find a dedicated point of contact for each step. Someone is following up at every stage, ensuring clearer information and more stable delivery.
01We respond quickly to your inquiries, help you sort out project requirements, coordinate internal resources, and prepare quotation documents.
——Making project initiation smoother.
02We understand your project drawings, confirming the profile structure, glass configuration, hardware solutions, and performance parameters — reducing communication and rework.
03We closely monitor the schedule and delivery dates, notifying you in advance at each key milestone — making batch production predictable.
04Pre-shipment Door-by-Door Inspection:
(Airtightness, watertightness, appearance, dimensions),
Ensuring the goods you receive match the confirmed samples
Send drawings, dimensions, or project requirements. Haipai Chuang can provide product selection, structural detailing, sample prototyping, and OEM/ODM customization support.