Full definition
International standard specifying requirements for rubber covers on conveyor belts used for general-purpose bulk material handling. ISO 14890 classifies belt cover rubber into categories based on three key resistance properties: (1) Abrasion resistance: Category H (≤120 mm³ volume loss per ISO 4649/DIN 53516 — highest abrasion resistance), Category D (≤150 mm³ — high), Category L (≤200 mm³ — normal). (2) Oil resistance: Category MOR (volume swell ≤80% in ASTM Oil No.1 — moderate oil), Category MORV (more severe oil resistance test — for mineral oils and fuels). (3) Flame resistance: not directly covered in 14890 — refer to ISO 340 (flame propagation) and ISO 284 (electrical conductivity) for fire-resistant belts. Additional cover properties specified: tensile strength, elongation at break, adhesion between cover and carcass, and aged properties (retention after air oven aging). ISO 14890 is the primary international specification reference for purchasing conveyor belt covers — specifying "covers per ISO 14890 Category H" ensures a defined minimum quality level regardless of manufacturer. Per ISO 14890:2003. Complementary standards: ISO 15236 (steel cord belts), DIN 22102 (German textile belt standard), and DIN 22109 (fire-resistant belts).