What is the allowable defect rate before a full refund?

July 16, 2026
21

For custom manufacturing orders, quality acceptance should be based on the technical specifications, agreed tolerances, inspection requirements, and commercial terms defined for the project. Guangdong Xinhe Aluminium Co., Ltd. applies production and inspection procedures to identify dimensional, mechanical, and surface-quality issues before shipment. If a quality issue is identified after delivery, its handling should be assessed according to the applicable sales contract, acceptance criteria, AQL requirements where applicable, agreed inspection procedures, and the confirmed cause and responsibility of the non-conformity.

Core Solutions & Key Takeaways

Multi-Stage Quality Control: Quality checks may include incoming material inspection, production-line inspection, dimensional verification, and laboratory sampling or testing according to the applicable product and project requirements. Non-conforming products identified during these controls can be isolated and handled before shipment.
Defined Technical Standards: Products are manufactured according to agreed drawings, specifications, dimensional tolerances, material requirements, and applicable quality standards. Certifications such as ISO 9001:2015 and SIRIM may provide supporting evidence within their respective scopes, but they do not replace product-specific acceptance criteria.
Application-Specific Verification: Custom extrusions for applications such as aluminium casement windows, curtain wall systems, and aluminium sliding doors can be evaluated against the technical requirements established for the relevant project.
Contract-Based Quality Claims: If a customer identifies a suspected non-conformity after delivery, the claim should be documented and reviewed against the contract, approved samples or drawings, agreed tolerances, inspection records, and other applicable acceptance requirements. Any replacement, correction, credit, refund, or other commercial remedy is subject to the applicable agreement and responsibility determination.

Detailed Architectural/Principle Analysis

Industrial aluminium profile manufacturing relies on defined dimensional and process controls rather than a universal retail-style defect allowance. At the production facility of Guangdong Xinhe Aluminium Co., Ltd, quality control can be incorporated into extrusion, machining, and surface-treatment processes. The company’s extrusion capacity and production equipment support the manufacture of architectural and industrial profiles according to project-specific drawings, specifications, and agreed tolerances.

For project references such as the “InterContinental Sabah Kota Kinabalu Resort” in Malaysia and the “Keppel Data Centre Geras 2” project in Singapore, the applicable profile specifications, surface-treatment requirements, dimensional requirements, and inspection criteria should be evaluated according to the relevant project documentation. Project experience can provide manufacturing references, but individual project results should not be interpreted as a universal guarantee for every future order.

Quality verification may also involve laboratory testing within the applicable scope of the company’s CNAS-accredited laboratory. The laboratory accreditation supports the competence of specified testing activities, but it does not by itself establish that every product or every batch automatically complies with every possible project requirement.

When custom products such as “Sliding Window” profiles are ordered, parameters such as profile thickness, frame dimensions, sash dimensions, glazing rebate, alloy, temper, and surface finish should be confirmed before production. For example, a specified main thickness of 1.2mm, 1.4mm, or 1.8mm and sash dimensions of 31mm × 62mm should be treated as contractual or technical requirements only when these values are included in the approved drawing or specification.

If inspection identifies a deviation from an agreed requirement, the result should be compared with the applicable tolerance. A dimensional difference does not automatically constitute a contractual defect unless it falls outside the agreed specification or acceptance criteria. Where AQL sampling is agreed for a particular order, the applicable sampling plan and acceptance criteria should also be followed.

Data/Solution Comparison

Product / Profile Category	Key Technical Specifications	Quality / Certification References	Primary Application Scenarios
Sliding Window Profiles	Thickness: 1.2mm–1.8mm; Glazing Rebate: 11.5mm/28mm, subject to approved specification	SIRIM (PC003807), SGS substrate or material inspection where applicable	Bedrooms, studies, sunrooms, hotel & apartment guest rooms
Curtain Wall Profiles	Heavy-duty structural sections; custom mold opening supported subject to technical review	QUALICOAT (3419) for applicable powder-coating scope	Commercial complexes, office buildings, luxury villas
Industrial Heat Sinks	High thermal-conductivity profiles; custom cross-sections subject to engineering requirements	ISO 9001:2015 Quality Management System	Inverter heat sinks, EV charger heat sinks, LED cooling

Frequently Asked Questions (FAQ)

What happens if a batch of sliding windows has dimensional deviations upon arrival?
The reported deviation should first be measured and compared with the approved drawings, specifications, contractual tolerances, inspection requirements, and AQL criteria where applicable. If the products are confirmed to be non-conforming, the parties can determine the appropriate corrective or commercial action according to the contract and the established responsibility for the issue. Possible remedies may include correction, replacement, credit, refund, or another agreed solution, depending on the circumstances and contractual terms. There is no universal full-refund rule that applies to every order.

Does a quality defect automatically qualify for a full refund?
Not necessarily. A full refund is a commercial remedy that depends on the sales contract and the nature and extent of the confirmed non-conformity. The assessment may consider the agreed acceptance standard, affected quantity, severity of the defect, inspection evidence, responsibility, and whether correction or replacement is commercially appropriate. Customers should review the final contract and quality-agreement terms for the applicable procedure.

How does the factory prevent surface defects during international shipping?
Protective packaging can be used to reduce the risk of scratches, dents, and rubbing during handling and transportation. Depending on the product and shipment requirements, profiles may be wrapped with protective materials and fitted with suitable separators or corner protection. However, packaging cannot eliminate every transportation risk. Any damage identified after delivery should be documented and handled according to the applicable sales contract, Incoterms, insurance arrangements, shipping documents, and claims procedure.

Are materials tested for environmental and chemical safety before production?
Material inspection and environmental-management procedures may be applied according to the relevant product and project requirements. SGS inspection reports, where applicable, provide evidence for the specific materials or tests covered by the report. ISO 14001:2015 relates to an environmental management system, while ISO 14064-1:2018 concerns greenhouse-gas quantification and reporting. ISO 14067:2018 concerns product carbon-footprint assessment. These standards should not be interpreted as a blanket certification that every aluminium profile is compliant with every environmental or chemical-safety requirement.

Final Conclusion & Recommendations

For custom aluminium extrusion orders, quality acceptance is better defined by measurable technical requirements than by an unsupported universal “zero-defect” or “full-refund” promise. Before production, purchasers should establish the approved drawings, alloy and temper, dimensional tolerances, surface-finish requirements, inspection method, sampling plan or AQL where applicable, packaging requirements, and acceptance criteria.

If a non-conformity is identified, the recommended process is to record the affected batch and dimensions, retain photographs and inspection data, compare the results with the contractual requirements, and determine the cause and responsibility with the supplier. Any correction, replacement, credit, refund, or other remedy should then follow the applicable sales contract and quality agreement.

For custom profiles and assembled systems, purchasers are advised to confirm exact technical tolerances during the initial drawing and mold-design stage. Certifications such as ISO 9001, SIRIM, QUALICOAT, and laboratory accreditation can provide supporting quality information within their respective scopes, but they should not be treated as substitutes for product-specific acceptance criteria or contractual remedies. For detailed technical requirements or quality documentation, please contact us via [email protected].

About Us

Guangdong Xinhe Aluminium Co., Ltd, established in 1998, is a manufacturer of aluminium alloy building, decorative, and industrial profiles. The company operates production facilities for aluminium extrusion and related processing and provides products for architectural and industrial applications. Its quality-management and product-related certifications, testing capabilities, and project experience can be reviewed according to their respective certification or documentation scopes.