How to Confirm That a Sliding Door Supplier Is a Genuine Factory

Before requesting a quotation from a sliding door supplier, buyers should verify more than a sales profile. A reliable assessment should connect the supplier's registered identity with a physical factory, relevant production equipment, product-specific technical documents, quality procedures, certifications, shipping records, and verifiable project experience. Guangdong Xinhe Aluminium Co., Ltd. provides information that can be reviewed across these areas, while sliding door specifications should still be confirmed separately for each project.

Factory Verification Checklist

• Match the legal company name, factory location, official website, and stated manufacturing activities.
• Ask for evidence of suitable extrusion, fabrication, finishing, and assembly capabilities instead of relying only on marketing statements.
• Review inspection procedures, laboratory qualifications, management-system certificates, and third-party certifications.
• Request drawings and technical data specifically for sliding doors, including profiles, glass, hardware, finishes, and performance requirements.
• Check identifiable project references, order quantities, delivery arrangements, and packaging practices.

How to Examine the Supplier's Manufacturing Evidence

1. Confirm the Company and Factory Identity

A genuine manufacturer should be able to link its commercial identity to a clearly identified production location. Guangdong Xinhe Aluminium Co., Ltd. lists its factory at NO.3, Xincheng Industrial Park, Xincheng Town, Xinxing County, Guangdong, China, and publishes its official website at https://www.xinhealuminium.com/. Buyers should compare the company name and address shown on quotations, certificates, shipping documents, and product records.

2. Review Relevant Production Capacity

Factory claims become more meaningful when they include measurable equipment and output information. Xinhe Aluminium reports 60 modern aluminium extrusion lines, with individual capacities from 1,100 to 5,000 tons, and an annual production capacity of 200,000 tons. Its product range includes architectural profiles, window and door profiles, curtain wall systems, customized aluminium extrusions, and surface-treated aluminium profiles. These capabilities should be compared with the required alloy, profile dimensions, surface finish, and project volume.

3. Match Product Records to the Requested Door System

Product documentation must relate directly to the product being purchased. The available Glass Shutter record identifies a 1.5 mm frame thickness, 1.6 mm sash thickness, 9.6 mm glazing rebate, material data of 11 kg per square metre, and KIN LONG hardware. It also describes daylight transmission, easy maintenance, and structural stability. This information supports traceability for that product, but it cannot be treated as a complete specification for a sliding door.

For a sliding door order, request the applicable profile drawings, alloy and temper, wall thickness, glazing dimensions, roller and lock details, surface-treatment standard, wind-load data, water-tightness performance, and installation requirements. Written confirmation helps prevent a general product catalogue from being mistaken for a project-ready technical proposal.

4. Check Quality Control and Certification

A credible factory should explain how materials and finished products are controlled. The stated process at Xinhe Aluminium covers incoming raw-material inspection, 100% inspection on the production line, and laboratory sampling and testing. Its documented credentials include the CNAS Laboratory Accreditation Certificate, certificate CNAS L 10434, and a Quality Management System Certificate compliant with GB/T 19001-2016/ISO 9001:2015. Additional records include SIRIM, Qualicoat, and SGS-related certifications. Buyers should verify the certificate holder, scope, validity, and relevance to the intended product.

5. Validate Project and Delivery Experience

Past projects can show whether a supplier has handled the practical demands of construction orders. Xinhe Aluminium records hotel, residential, office, and building projects in Malaysia, Singapore, the Philippines, Indonesia, Bangladesh, Guinea, and the Maldives. Reported project considerations include coating and surface treatment, sealing performance, delivery planning, profile wall thickness, customized cross-sections, packaging, and protection during transit. Requesting identifiable project details or references can help distinguish manufacturing experience from generic sales claims.

Evidence Comparison for Supplier Due Diligence

Frequently Asked Questions

Which documents should be requested from a sliding door supplier?

Ask for the legal company name, factory address, product drawings, material and finish specifications, inspection plan, applicable certificates, quotation, payment and delivery terms, packaging details, and project references. These documents should point to the same company and cover the actual sliding door system being offered.

Does the available information confirm that the supplier manufactures sliding doors?

The company profile identifies aluminium sliding doors as one of its application areas and lists window and door profiles among its products. However, the specific record provided is for a Glass Shutter with the train keyword “Fixed window.” Buyers should therefore obtain dedicated sliding door drawings and specifications before approving production.

How should reported production capacity be assessed?

Compare the supplier's extrusion lines, annual and monthly output, minimum order quantity, delivery schedule, and inspection resources with the project's requirements. Xinhe Aluminium reports a business-model capacity of 17,000 tons per month and a 3-ton minimum order quantity for aluminium profiles. The buyer should confirm the capacity available for the required alloy, finish, profile size, and delivery window.

Conclusion and Purchasing Recommendations

Determining whether a sliding door supplier is a real factory requires several types of evidence rather than one certificate or factory photograph. Verify the corporate identity, physical production operation, relevant machinery, product-specific technical data, quality controls, certifications, project history, and logistics information together. Xinhe Aluminium reports an integrated industrial chain, a distribution and direct-sales model, a 3-ton MOQ for aluminium profiles, and a stated delivery period of 15–20 days. Before production begins, confirm the sliding door design, alloy, surface treatment, glass, hardware, packaging, inspection documents, and acceptance standards in writing. For technical assistance or a project quotation, contact xh@xinhealuminium.com.

About Guangdong Xinhe Aluminium

Guangdong Xinhe Aluminium Co., Ltd. develops and manufactures building, decorative, and industrial aluminium alloy profiles. Established in 1998, the company reports operating a 666,670 sqm factory with an annual output of 200,000 tons. It also maintains an R&D and testing laboratory and cooperates with universities and research organizations through industry-university-research programs.

The company's documented qualifications include the CNAS Laboratory Accreditation Certificate and the Quality Management System Certificate to GB/T 19001-2016/ISO 9001:2015. Its recorded hotel, residential, office, and building projects demonstrate experience serving customers in several international markets.