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

The testing standard system for GRC products comprises three tiers—national standards, industry standards, and internal enterprise control standards—forming a complete specification system ranging from basic requirements to high-end positioning. Qinglong Group strictly adheres to the JC/T940 standard 'Glass Fiber Reinforced Cement (GRC) Decorative Products', while also establishing more stringent internal control standards to ensure product performance comprehensively exceeds baseline requirements. Understanding this standard system helps owners establish appropriate quality expectations and acceptance criteria.

National and industry standards are 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 against these standards from the development stage onward to ensure compliance with national regulations. It should be noted, however, that standards define 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, and appearance—for example, raising the flexural strength standard from 15MPa to 18MPa and controlling thickness deviation 50% more tightly than the standard. This self-imposed rigor ensures products maintain excellent performance throughout long-term use. Internal control standards also cover full-process requirements such as raw material inspection and process control, forming a complete quality assurance system.

The scientific soundness of testing methods directly affects result accuracy. Qinglong Group's laboratory ensures testing consistency through regular comparison tests, and key equipment is sent for periodic calibration. For special performance requirements, such as the light transmittance of translucent GRC and the pollution coefficient of self-cleaning GRC, the company has developed dedicated testing methods. During acceptance, owners can select appropriate testing indicators and methods according to project characteristics; this standardized evaluation system provides a scientific basis for quality judgment.