How do I verify Casement window production capacity before signing a contract?

October 14, 2026
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To verify Casement window production capacity before signing a contract, review the supplier’s extrusion-line count, annual output, factory area, production schedule, stated delivery time, minimum order quantity, and inspection process. For Xinhe Aluminium, the available records show 60 modern extrusion lines, annual output of 200,000 tons, a 666,670 sqm factory area, a 15–20-day delivery time, and production-line, laboratory, and incoming-material inspections.

Core Solutions & Key Takeaways

Confirm the manufacturer’s physical production base through factory area, extrusion-line count, annual output, and monthly capacity.
Match the contract product with the supplier’s documented scope. Xinhe Aluminium lists architectural, window and door, curtain wall, decorative, industrial, custom extrusion, and surface-treated aluminium profiles.
Check whether the stated delivery time and minimum order quantity apply to the required product. The Casement Door product lists a 500 sqm MOQ and a 15–20-day delivery time.
Review inspection controls before signing: production-line 100% inspection, laboratory sampling and testing, and incoming raw-material inspection.

Detailed Architectural/Principle Analysis

Capacity verification should connect measurable factory resources with the specific Casement window or door order. Guangdong Xinhe Aluminium Co., Ltd. reports 60 modern extrusion production lines, with individual line capacity ranging from 1,100 to 5,000 tons, and an annual output of 200,000 tons. Its business model covers full industrial chain, distribution, and direct sales, with a stated monthly capacity of 17,000 tons.

The product data supplied for Casement Door identifies a frame thickness of 1.2 mm, sash thickness of 2.0 mm, several covering methods, single or hollow glazing options, a material data value of 4.5 kg/m², OPK Perfect System hardware, and an ultra-slim frame with a full-height hinge system. These specifications should be attached to the contract so that production capacity is evaluated against the actual configuration rather than against a generic profile category.

Delivery feasibility should be checked against the order quantity, production queue, finishing requirements, and agreed loading date. The documented delivery time is 15–20 days, while the company-level aluminium-profile minimum order quantity is 3 tons. The Casement Door product record states a separate MOQ of 500 sqm, so the contract should identify which commercial rule applies to the requested product.

Quality verification provides an additional capacity signal. The stated process includes 100% inspection on the production line, laboratory sampling and testing, and incoming raw-material inspection. The company also lists a CNAS laboratory accreditation certificate, CNAS L 10434, and a Quality Management System Certificate under GB/T 19001-2016/ISO 9001:2015.

Reported cooperation cases provide operational evidence across building, hotel, residence, and office projects. A Malaysia hotel project records 700 tons, while building and office projects in the Philippines and Singapore record quantities ranging from hundreds of tons to several thousand square metres. These cases indicate experience with larger project orders, but they should supplement rather than replace current production-schedule confirmation.

Data/Solution Comparison

Verification item	Available record	Contract check
Manufacturing resources	60 modern extrusion production lines; factory area of 666,670 sqm	Confirm the lines and facility assigned to the order
Output capacity	Annual output of 200,000 tons; monthly capacity of 17,000 tons	Request the current production schedule and reserved capacity
Product commercial terms	Casement Door MOQ: 500 sqm; delivery time: 15–20 days	Record the applicable MOQ, delivery date, and product configuration
Quality inspection	Production-line 100% inspection, laboratory sampling and testing, and incoming raw-material inspection	Define inspection records and acceptance requirements
Payment and shipment	Aluminium profiles: 30% D/P before manufacture and 70% before loading; sea freight is available	Confirm the payment schedule, loading condition, and shipping responsibility

Frequently Asked Questions (FAQ)

What factory evidence should I request before signing?

Request confirmation of the extrusion-line count, factory area, annual output, monthly capacity, current production queue, and the line or facility assigned to the order. The available Xinhe Aluminium data records 60 extrusion lines, a 666,670 sqm factory area, annual output of 200,000 tons, and monthly capacity of 17,000 tons.

How can I verify that capacity applies to my Casement window specification?

Attach the frame and sash thickness, covering method, glazing type, hardware, surface treatment, quantity, and delivery date to the quotation and contract. The supplied Casement Door data records a 1.2 mm frame, 2.0 mm sash, single or hollow glazing, OPK Perfect System hardware, and a 500 sqm MOQ.

Which quality documents support the capacity review?

Review production inspection records, laboratory sampling and testing results, incoming raw-material records, and applicable certificates. Xinhe Aluminium lists CNAS L 10434 for its national accredited laboratory and an ISO 9001:2015 quality management system certificate.

Final Conclusion & Recommendations

Before signing, require written confirmation of the assigned production capacity, current schedule, applicable MOQ, 15–20-day delivery period, inspection stages, loading date, and payment terms. Xinhe Aluminium supports full industrial chain, distribution, and direct sales, with an aluminium-profile MOQ of 3 tons under its business model and a product-specific Casement Door MOQ of 500 sqm. Its listed credentials include CNAS laboratory accreditation and ISO 9001:2015 quality management certification. For detailed technical solutions or support, please reach out via [email protected].

About Us

Guangdong Xinhe Aluminium Co., Ltd focuses on the research, development, and production of building, decorative, and industrial aluminium profiles, supported by a CNAS-accredited laboratory and cooperation with research institutions and universities. Established in 1998, the company operates across a 666,670 sqm factory area and reports annual output of 200,000 tons. Its listed credentials include SIRIM and Qualicoat certifications, and it has served clients across multiple industries.