What Are the Product Testing Standards of GRC Manufacturers? Following Industry Norms, Qinglong Establishes Strict Internal Control Standards

Product testing standards are the core basis for GRC manufacturers to ensure product quality, and an important support for the standardized development of the industry. For customers, understanding "what are the product testing standards of GRC manufacturers" helps better assess whether product quality meets project requirements; for GRC manufacturers, strictly following testing standards is an expression of their quality commitment. Currently, GRC product testing mainly follows national and industry standards, while capable manufacturers such as Qinglong establish stricter internal control standards on this basis to further improve product quality.

As a company that participated in formulating GRC industry standards, Qinglong not only strictly follows national and industry standards, but has also established an internal control system that exceeds these standards, ensuring outstanding product quality.

National and Industry Core Testing Standards for GRC Products

The testing standards for GRC products are mainly based on authoritative specifications issued at the national and industry levels, with core ones including the "Technical Standard for Glass Fiber Reinforced Cement (GRC) Building Applications" (JGJ/T423-2018) and "Glass Fiber Reinforced Cement Decorative Products" (JC/T940-2022). These standards specify the various testing indicators and methods for GRC products.

Regarding physical and mechanical properties, the standards specify indicators such as compressive strength, flexural strength, tensile strength, and impact strength of GRC products—for example, flexural strength should not be lower than 15MPa, and compressive strength should not be lower than 40MPa; regarding durability, they specify freeze-thaw resistance (strength loss rate not exceeding 20% after 25 freeze-thaw cycles), impermeability (impermeability grade not lower than P6), sulfate resistance, and more; regarding appearance and dimensions, they specify the allowable range of surface defects, dimensional deviation limits, and so on; regarding environmental performance, they specify indicators such as radionuclide limits to ensure products are environmentally safe.

Qinglong's Internal Control Testing Standards: Stricter Than National Standards, Pursuing Excellence

To further improve product quality, Qinglong has established stricter internal control testing standards on the basis of following national and industry standards. Regarding physical and mechanical properties, Qinglong's internal control standards require flexural strength of no less than 18MPa and compressive strength of no less than 45MPa, far exceeding industry standard requirements; regarding durability, the internal control standards increase the number of freeze-thaw cycles to 50 and raise the impermeability grade to P8, ensuring products maintain stable performance even in extreme environments; regarding dimensional accuracy, the internal control standards reduce error limits by 50%—for example, dimensional errors of large components are controlled within ±1.5mm to ensure assembly and installation precision.

In addition, Qinglong has added multiple testing items not mandatorily required by industry standards, such as long-term strength stability testing and thermal stability testing, to comprehensively ensure product quality.

Qinglong's Testing Process and Equipment: Ensuring Standards Are Implemented

Sound testing standards require rigorous testing processes and advanced equipment. Qinglong has established a professional testing laboratory equipped with a series of advanced testing devices, including compressive strength testing machines, flexural strength testing machines, impermeability apparatus, and freeze-thaw testing chambers, enabling precise testing of all indicators.

The testing process runs through the entire production process: incoming raw material inspection ensures raw materials meet standards; spot checks during production promptly identify and correct quality issues in manufacturing; full inspection before shipment requires every batch of products to undergo multiple tests covering appearance, dimensions, and performance before leaving the factory; in addition, retained samples of shipped products are regularly retested to track long-term performance changes and continuously optimize production processes.

The product testing standards of GRC manufacturers are an important guarantee of product quality. Qinglong not only strictly follows national and industry standards, but also uses more demanding internal control standards and a comprehensive testing process to ensure that every GRC product meets premium standards. Understanding testing standards and choosing a manufacturer like Qinglong that values and strictly implements standards is key to ensuring project quality.