Full definition
ISO 14890 is an international standard that outlines the requirements for rubber covers on conveyor belts specifically designed for general-purpose bulk material handling. This standard plays a crucial role in ensuring that the belts meet specific performance criteria, which is vital for maintaining operational efficiency and safety in industrial settings. The classification under ISO 14890 is based on three main resistance properties: abrasion resistance, oil resistance, and additional properties that ensure the durability of the rubber cover. Abrasion resistance is categorized into three levels: Category H, which has the highest abrasion resistance with a maximum volume loss of ≤120 mm³ as per ISO 4649/DIN 53516; Category D with a loss of ≤150 mm³, indicating high abrasion resistance; and Category L with ≤200 mm³, considered normal abrasion resistance. This classification allows engineers and procurement managers to select the right belts based on the material handling requirements of their specific applications.
In terms of oil resistance, ISO 14890 categorizes rubber covers into two categories: Category MOR, which indicates moderate oil resistance with a volume swell of ≤80% in ASTM Oil No.1, and Category MORV, which is designed for more severe oil conditions, particularly suitable for mineral oils and fuels. It should be noted that while flame resistance is not directly covered in ISO 14890, it is essential to reference ISO 340 for flame propagation and ISO 284 for electrical conductivity when considering fire-resistant belts. These additional standards complement ISO 14890 and provide a comprehensive approach to evaluating the suitability of conveyor belts in environments where fire risk is a concern.
Moreover, ISO 14890 specifies additional cover properties such as tensile strength, elongation at break, adhesion between the cover and carcass, and retention of properties after aging in an air oven. This holistic approach to rubber cover specifications ensures that users can purchase conveyor belts with a defined minimum quality level, thereby reducing the risk of equipment failure and increasing the reliability of bulk material handling operations. By ensuring compliance with ISO 14890, companies can confidently select conveyor belts that meet industry standards, thus facilitating smoother operations across various sectors such as mining, construction, and logistics.