Industrial rubber hoses come in various types to suit different applications. To meet these diverse needs, manufacturers use a range of materials for the inner tube. For example, chemical industry hoses require corrosion-resistant materials, while oil transfer hoses need oil-resistant inner tubes. Below are some common rubber hose inner tube materials:
1. Metal Inner Tubes
For general fluid systems, metal inner tubes are a solid choice. They offer exceptional temperature resistance, with ratings ranging from -200°C to 454°C or higher. This makes them ideal for extreme-temperature environments. Additionally, metal tubing is suitable when low absorption levels are critical.
However, metal inner tubes aren’t recommended for highly corrosive or acidic media, as prolonged exposure can cause corrosion. They’re also less suitable for applications involving repetitive motion, as this can lead to fatigue failure.
2. Silicone Rubber
Silicone hoses are ideal for hygienic applications due to their flexibility and ease of cleaning. Available in medical and food-grade variants, they operate safely between -53°C and 315°C.
Yet, silicone’s high absorbency poses challenges. Industrial hoses made from silicone can trap contaminants within the tube wall, which standard steam cleaning may not fully remove. Frequent steam cleaning can also damage the inner tube. Moreover, silicone is incompatible with solvents and may degrade prematurely under high temperatures, leading to cracking and brittleness.