What Are the Product Testing Standards of GRC Manufacturers? National Standards and Internal Control Systems Explained

The GRC product testing standard system comprises three levels: national standards, industry standards, and internal enterprise control standards, forming a complete specification framework ranging from basic requirements to premium positioning. Qinglong Group strictly complies with the JC/T940 standard for Glass Fibre Reinforced Cement (GRC) Decorative Products, while also establishing more stringent internal control standards to ensure product performance comprehensively exceeds basic requirements. Understanding this standard system helps owners establish proper quality expectations and acceptance criteria.

National and industry standards represent the baseline requirements for product quality. The JC/T940 standard specifies the classification, technical requirements, test methods, and inspection rules for GRC products. Mechanical performance requirements include indicators such as flexural strength and impact resistance, while durability requirements include tests such as frost resistance and alkali resistance. Qinglong Group designs its products to these standards from the development stage onwards, ensuring compliance with national specifications. However, it should be noted that standards specify minimum requirements, and premium products often far exceed these indicators.

Internal enterprise control standards reflect a manufacturer's pursuit of quality. Qinglong Group's internal control standards are stricter than national standards in terms of strength, durability, appearance, and other aspects—for example, raising the flexural strength standard from 15MPa to 18MPa and tightening thickness deviation control by 50% beyond the standard. This self-imposed rigor ensures products maintain excellent performance over long-term use. Internal control standards also cover whole-process requirements such as raw material inspection and process control, forming a complete quality assurance system.

The scientific rigor of testing methods directly affects result accuracy. Qinglong Group's laboratory ensures testing consistency through regular comparative tests, with key equipment periodically sent for calibration. For special performance requirements, such as the light transmittance of translucent GRC or the pollution coefficient of self-cleaning GRC, the company has developed dedicated testing methods. Owners can select appropriate testing indicators and methods based on project characteristics during acceptance, and this standardized evaluation system provides a scientific basis for quality judgment.