Spiral Steel Silo

Overview
Large-scale storage systems for grain, cement, and powdered materials
Capacity: 50–50,000 tons
Diameter: 3–60 m
Service life: 25–30 years
Installation time: 7–15 days
Custom designs and overseas installation guidance available

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Description

Technical Parameters

Product Description

The spiral steel silo is a modern storage facility constructed using on-site spiral forming technology. By continuously rolling steel sheets, it creates a structure with no transverse welds, offering high strength, excellent sealing, and rapid construction.

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Core Parameters

Parameter	Range
Capacity	50T – 50,000T
Diameter	3m – 60m
Material	Galvanized Steel / Stainless Steel
Plate Thickness	2 – 6 mm
Service Life	25 – 30 years
Wind & Earthquake Resistance	Grade 12 Wind / Magnitude 8 Earthquake

Technical Principles

Spiral Interlocking Structure

Spiral steel silos are manufactured using specialized equipment that continuously rolls steel sheets to form spiral reinforcing ribs 30–40 mm wide. These ribs are approximately five times thicker than the base material, significantly enhancing the overall load-bearing capacity.

✔ No welding → Eliminates structural weaknesses

✔ Self-locking structure → Improves stability

✔ Continuous forming → More uniform strength

Compared to traditional welded silos: Structural strength is increased by over 30%

Key Advantages

Strong Structure, High Safety

The thickness at the spiral seams is approximately five times that of the original steel plate, forming vertical and circumferential stiffeners that provide excellent resistance to seismic, wind, and snow loads. The spiral steel silo features no welds or bolt holes, ensuring excellent structural integrity and resistance to deformation and leakage.

Excellent Airtightness

With continuous mechanical interlocking seams and an air leakage rate of ≤0.1%, these silos meet the requirements for grain fumigation and storage with inert gases, ensuring effective pest control and sterilization.

Rapid Construction

On-site mechanical rolling allows a single silo (≤5,000 tons) to be completed in just 7–15 days-5–8 times faster than concrete silos.

Lightweight (approximately 1/6 the weight of a concrete silo of the same capacity), resulting in lower foundation costs. 15%–20% cheaper than welded silos of the same capacity.

Compact footprint and high space utilization

Flexible adjustment of silo diameter and height; minimum silo spacing of just 500 mm allows for compact layout, saving land.

Applications

Grain Industry

Spiral steel silos can be used in grain warehouses, flour mills, rice mills, breweries, and other facilities to store wheat, corn, rice, soybeans, and other grains.

Building Materials or Cement Industry

Cement plants, grinding stations, and mixing stations use these silos to store powdered materials such as cement, fly ash, slag powder, and limestone powder.

Feed and Oil Industry

Feed mills and oil mills use them to store raw materials and finished products such as corn, soybean meal, bran, and rapeseed, providing a sealed environment that prevents insect infestation and oxidation.

Chemical and Environmental Protection Industry

Chemical plants, pharmaceutical facilities, and starch mills use them to store corn starch, chemical powders, additives, and other materials, meeting food-grade hygiene standards and preventing contamination.