Telescopic Chute Tube Material

The telescopic chute tube is the core component of a telescopic loading chute, designed to guide bulk materials safely and efficiently from a conveyor or hopper into trucks, rail wagons, or ship holds. The tube material selection is critical because it directly affects wear life, dust control performance, maintenance cost, and overall operating reliability.

These are cascading conical tubes for telescopic loading chutes which are used on ship loaders.

In industrial bulk material handling systems, telescopic chute tubes are typically manufactured from metallic materials with high mechanical strength, often combined with wear-resistant linings or coatings, to withstand continuous material flow, impact, and abrasion.

Purpose of Tube Materials

Telescopic chute tube materials are selected to:

• Withstand abrasive and impact loads from bulk materials
• Maintain structural rigidity during telescoping movement
• Provide smooth internal surfaces for controlled material flow
• Support dust-free loading when combined with sealing bellows
• Offer suitable corrosion resistance for the operating environment

Common Telescopic Chute Tube Materials

Carbon Steel

• Widely used for standard bulk materials
• High strength and cost-effective
• Often protected with paint, epoxy, or internal liners
• Suitable for coal, aggregate, limestone, and clinker

Wear-Resistant Steel (AR / NM / Hardox Series)

• Designed for highly abrasive materials
• Significantly longer service life than mild steel
• Common grades: NM400, NM450, Hardox 400/450
• Ideal for iron ore, sand, gravel, and minerals

Stainless Steel (304 / 316)

• Excellent corrosion resistance
• Smooth surface improves material flow
• Used in fertilizer, chemical, food, and salt handling
• 316 preferred for marine or high-humidity environments

Internally Lined Steel Tubes

• Carbon or wear steel base with internal liners such as:
  • UHMW-PE
  • Polyurethane
  • Ceramic or rubber lining
• Reduces wear, noise, and material adhesion
• Suitable for sticky or fine materials like cement and fly ash

Supporting Components

While the inner telescopic tubes are rigid metal structures, the outer dust sealing cover is usually made from:

• Reinforced fabric
• Neoprene-coated material
• PVC or rubberized textile

This combination ensures smooth telescoping movement and effective dust containment.

In summary, telescopic chute tube materials are engineered to balance strength, wear resistance, corrosion protection, and material flow performance. Carbon steel is used for general applications, wear-resistant steel for abrasive materials, and stainless steel for corrosive or hygienic environments. Proper material selection ensures long service life, reduced maintenance, and reliable dust-controlled bulk loading operations.

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