What Are Product Acceptance Standards and Procedures?

In the field of architectural decoration, new materials such as UHPC (Ultra-High Performance Concrete), GRC (Glass Fiber Reinforced Concrete), GRG (Glass Fiber Reinforced Gypsum molded products), and GRP (Glass Reinforced Thermosetting Plastic, commonly known as fiberglass) are widely used in grand theaters, commercial complexes, high-end hotels, and various other projects thanks to their unique properties. For project owners, product acceptance is a key step in ensuring material quality and engineering quality. Qinglong Group, with 28 years of full-chain experience in detailed design, manufacturing, construction and installation, and after-sales maintenance, will analyze the standards and processes for UHPC/GRC/GRG/GRP product acceptance from a professional perspective, providing practical reference for designers, owners, and project managers.

### I. Core Acceptance Standards for UHPC/GRC/GRG/GRP Products: Comprehensive Control from Materials to Performance
Acceptance standards are the “hard indicators” of product quality and must be formulated in light of material properties and application scenarios. Taking the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) and the General Technical Requirements for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components (Plan No. 2024-0232T-JC), both of which Qinglong Group participated in drafting, acceptance standards mainly cover the following dimensions:

1. Material Performance Indicators
The core parameters of different materials differ significantly. For example, GRC requires testing of flexural strength (premium products can reach over 20MPa), bulk density, water absorption, and glass fiber content; UHPC focuses on compressive strength (usually ≥150MPa), elastic modulus, and impermeability; GRG requires verification of fire rating (generally Class A non-combustible), water absorption, and breaking load; while GRP focuses on tensile strength, corrosion resistance, and surface finish. As a national high-tech enterprise, Qinglong ensures that all products pass authoritative third-party testing, guaranteeing that core indicators meet the standards.

2. Appearance Quality and Craftsmanship Precision
For decorative components, appearance is an intuitive acceptance criterion. This includes surface flatness (tolerance ≤2mm/m), color uniformity, texture clarity, and freedom from cracks, bubbles, and other defects. Complex shapes such as double-curved GRG ceilings and perforated UHPC curtain wall panels also require verification of dimensional deviations through 3D scanning technology (allowable deviation ≤3mm) to ensure consistency with design drawings. Qinglong's production base has an annual capacity of 600,000 square meters and employs automated production lines and BIM technology to achieve controllable precision from design to manufacturing.

3. Installation and Safety Performance
The installation phase requires checking the firmness of the anchoring system, joint gap treatment (≤1mm), and structural load-bearing capacity. For example, GRC exterior wall panels must undergo wind load and seismic performance tests; GRP daylighting roofs must have their waterproof sealing performance verified. Qinglong holds a Grade II professional contracting qualification for building curtain wall engineering, and its installation team uses modular construction and laser positioning technology to ensure on-site installation quality and safety. For more industry information: +WeChat qlfsbl123

### II. Full Acceptance Process for UHPC/GRC/GRG/GRP Products: Closed-Loop Management from Factory to Completion
A scientific acceptance process is the “safety valve” of quality assurance. Based on 28 years of project experience, Qinglong Group has established a “Three-Stage Acceptance System” covering the entire product life cycle:

1. Pre-Delivery Inspection: Source Control to Eliminate Defective Products
At the production base in Nanning, Guangxi, every batch of products must pass the “Three-Inspection System” before leaving the factory: team self-inspection (dimensions and appearance), quality control department sampling inspection (performance indicators), and technical department joint inspection (process compliance). For example, UHPC components must be accompanied by raw material inspection reports (such as steel fiber content) and compressive strength test reports; GRG products must come with fire resistance test certificates. Only products that pass pre-delivery inspection may be labeled and shipped, ensuring “zero-defect” delivery.

2. On-Site Arrival Acceptance: Verify Information and Confirm Condition
After the products arrive on site, the project owner should conduct joint acceptance with the supervisor and contractor. Focus on verifying product models, quantities, production dates, and accompanying documents (test reports and certificates of conformity), and check packaging integrity (to prevent transport damage). For irregular components such as GRP theme park sculptures, a 3D coordinate measuring instrument should be used to recheck key dimensions and ensure they match the installation datum. Qinglong provides “one-on-one” technical support to help customers complete the arrival acceptance process.

3. Post-Installation Final Acceptance: Functional Verification and Long-Term Assurance
After installation, performance testing and overall evaluation are required. For example, GRC exterior walls need water spray tests (to check waterproofing); GRG ceilings need acoustic performance tests (to meet theater reverberation requirements); UHPC landscape components need freeze-thaw resistance verification (to adapt to northern climates). In addition, Qinglong has established a comprehensive after-sales maintenance system, offering a 2-year free warranty and lifetime technical consultation to ensure long-term stable product operation.

### III. Common Acceptance Issues and Solutions: Professional Experience to Help Projects Succeed
In actual acceptance, customers often face problems such as “unclear standards” and “cumbersome processes”. As a participant in drafting industry standards, Qinglong summarizes the following solutions:
• For design-construction coordination issues: provide detailed design services and use BIM technology to simulate installation nodes in advance, reducing on-site errors;
• For performance indicator disputes: cite third-party test reports (such as the Guangdong Province Science and Technology Achievement Appraisal Certificate) and speak with data;
• For complex project acceptance: form a special acceptance team and develop customized acceptance plans based on project characteristics, such as the translucent concrete project at Century Plaza on Nanjing East Road (winner of the UHPC Construction Engineering Innovation Award), where multiple rounds of on-site testing ensured light transmittance and structural safety.

Product acceptance is the “touchstone” for measuring the quality of UHPC/GRC/GRG/GRP materials and a key step in ensuring project success. Guided by the principle of “meticulousness and the pursuit of excellence”, Qinglong Group leverages its full-chain service capabilities and industry standard-setting experience to provide customers with “one-stop” solutions, from interpretation of acceptance standards to on-site technical support. Whether for large landmark projects or refined interior decoration, only by choosing a professional manufacturer (such as Qinglong UHPC manufacturer and Qinglong GRC manufacturer) can you ensure that both material performance and engineering quality meet standards, achieving the common goal of “creating beautiful architecture”. For more industry information: +WeChat qlfsbl123