Overview
CR lining, made from chloroprene rubber (neoprene), is a versatile industrial material prized for its durability and resistance to harsh conditions. It is widely used to protect metal surfaces from corrosion, abrasion, and chemical attack in industries such as mining, chemical processing, and oil & gas. Developed in the early 20th century, CR rubber combines the elasticity of natural rubber with enhanced resistance to oils, ozone, and weathering. This makes CR lining a preferred choice for long-term protection of critical infrastructure where maintenance opportunities are limited.
Physical and Chemical Properties
CR lining exhibits a unique combination of physical toughness and chemical stability. Its typical hardness ranges from 40 to 90 Shore A, allowing for flexibility while maintaining structural integrity. The material maintains its properties across a temperature range of -40°C to 120°C, suitable for most industrial environments. Chemically, CR lining shows excellent resistance to oils, greases, and many corrosive chemicals including diluted acids and alkalis. However, it is not recommended for use with concentrated oxidizing acids or aromatic hydrocarbons. The material's abrasion resistance is approximately 3-5 times better than natural rubber, significantly extending equipment service life.
Main Applications
The primary use of CR lining is in protecting industrial equipment from wear and corrosion. In mining operations, it lines slurry pipelines and processing equipment exposed to abrasive materials. Chemical plants utilize CR lining for storage tanks and reactor vessels handling corrosive substances. Other applications include lining for conveyor systems in food processing (where FDA-approved grades are available), protective coatings for marine equipment, and vibration damping in heavy machinery. The material's flexibility allows it to be fabricated into complex shapes, making it suitable for custom equipment protection solutions.
Safety and Storage
While CR lining is generally safe when properly cured, precautions should be taken during handling and installation. Uncured material may contain residual chemicals that can cause skin irritation - gloves and proper ventilation are recommended during fabrication. For storage, CR lining sheets should be kept in their original packaging in a cool (below 30°C), dry environment. Stacking height should be limited to prevent deformation, and materials should be rotated using a first-in, first-out system to prevent aging. Exposure to ozone sources (such as electric motors) should be minimized to prevent premature degradation.
B2B Procurement Guide
When procuring CR lining, buyers should specify the required thickness (typically 3-12mm), hardness (Shore A scale), and any special chemical resistances needed. Reputable suppliers should provide material test reports confirming compliance with relevant standards such as ASTM D2000 or DIN 53504. For large projects, consider requesting samples for preliminary testing under actual service conditions. Lead times can vary significantly (2-8 weeks) depending on customization requirements, so early engagement with suppliers is recommended. Bulk purchases (full rolls rather than cut pieces) typically offer 15-30% cost savings.
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