Bolted Dry Bulk Silos Engineered Around Your Material
Carolina Material Technologies represents AST Storage for engineered bolted dry bulk silo applications. We combine AST's flat-panel, factory powder-coated silo construction with the filling, venting, level control, flow aids, discharge, feeding and conveying equipment required for a reliable storage system.
Why Choose a Bolted Dry Bulk Silo?
Bolted silos are especially attractive when the required storage capacity, transportation route or installation site makes delivery of a complete welded vessel impractical. Engineered panels can be shipped efficiently and assembled at the project site.
That gives engineers more flexibility when planning larger vessels, multi-silo installations, drive-through arrangements and projects where access or available erection space is limited.
- Larger storage requirements: field erection avoids many one-piece transportation constraints.
- Constrained site access: panelized components can be staged and erected where a completed vessel may be difficult to deliver.
- Multi-silo projects: repeatable panel construction works well for storage farms and multiple product grades.
- Drive-through layouts: elevated vessels can be engineered around truck loadout and process access requirements.
- Project flexibility: hopper, support, platform and access arrangements can be developed around the application.
- System integration: nozzles, outlets and accessories can be coordinated with the material handling equipment around the silo.
Why Carolina Material Technologies Partners With AST Storage
AST Storage manufactures bolted powder-coated steel storage systems and brings extensive fabrication, erection, engineering and project-management experience to industrial storage projects.
For dry bulk service, AST combines straight-seam flat-panel construction with controlled factory coating and a project approach that can extend beyond the vessel to site layout, foundations, material handling, loadout, weighing, electrical and controls coordination.
Bolted Silo Applications for Powders, Pellets & Granular Materials
AST identifies a broad range of dry bulk materials for bolted silo storage. The stored product then drives decisions around hopper geometry, coatings, flow aids, outlet size, venting and downstream equipment.
Mass Flow vs. Funnel Flow Silo Design
AST identifies both mass-flow and funnel-flow designs among its dry bulk capabilities. The correct approach depends on the material's flow properties, required residence time, segregation sensitivity, storage capacity and process needs.
A central flow channel develops during discharge
In funnel-flow storage, material moves through an active channel while some solids near the vessel walls can remain stagnant until the inventory level falls sufficiently.
Funnel flow can be appropriate for some free-flowing materials and storage duties, but the effects of stagnant regions, segregation and residence time should be considered.
Best design depends on the actual bulk-solid behavior.The stored material moves throughout the vessel cross-section
In a mass-flow vessel, the bulk solid is intended to remain in motion along the walls as material is discharged, producing more uniform movement through the silo.
Mass-flow design can be beneficial where first-in/first-out behavior, segregation, residence time or difficult flow makes stagnant material undesirable.
Hopper angle alone does not determine mass flow.AST Powder Epoxy Coating for Bolted Storage Silos
One of AST's core differentiators is its factory-controlled powder coating process. Coating is applied to the steel panels before shipment rather than relying on a field-applied finish after the vessel has been erected.
AST describes electrostatic powder application and thermal curing under controlled manufacturing conditions. Its coating literature emphasizes adhesion, coverage, abrasion and impact resistance, UV protection and long service life.
Bolted Silo Configurations for Industrial Storage & Loadout
Support steel, hopper elevation, access, loadout and surrounding equipment can be configured around the operating requirements of the facility.
The AST Silo Is One Part of the Dry Bulk System
Reliable storage depends on what happens before the product enters the silo, what happens while it is stored, and how it is discharged to the process.
Carolina Material Technologies can help coordinate the equipment around the AST vessel, reducing the risk of treating venting, level controls, flow aids, feeders and conveying as unrelated purchases.
Receiving & Fill Air
Truck, rail or plant transfer establishes fill rate, airflow, line size and receiving-system requirements.
Explore blower systems →Bin Venting & Dust Control
Displaced conveying air must be filtered while keeping the silo within its allowable pressure limits.
Explore dust collection →Level & Overfill Protection
Point-level switches, continuous level measurement and alarms provide inventory visibility and filling protection.
Explore level controls →Aeration & Flow Aids
Air pads and other flow-assistance methods can help address compaction, rat-holing and inconsistent flow.
Explore aeration →Bin Activators & Discharge
Difficult powders may require a dedicated discharger rather than relying solely on gravity.
Explore bin activators →Isolation Gates
Slide or knife gates provide isolation for maintenance, feeder removal and downstream process control.
Explore gates & valves →Rotary Airlocks
Rotary valves can meter solids or maintain pressure isolation when feeding pneumatic conveying systems.
Explore rotary valves →Feeding & Metering
Screw, vibratory and gravimetric feeding options are matched to material behavior, required rate and accuracy.
Explore feeding equipment →Conveying to Process
Pneumatic or mechanical transfer is selected around distance, rate, elevation and product characteristics.
Explore pneumatic conveying →Weighing & Controls
Load cells, PLC controls, alarms, interlocks and HMI functions can integrate storage with the plant operating sequence.
Ask CMT about integration →How We Develop a Bolted Silo Application
A good RFQ starts with the material and operating requirement—not simply a diameter and height.
Define the Material
Product, bulk density, particle size, moisture, temperature, abrasiveness and known flow behavior establish the design basis.
Establish Storage Duty
Capacity, delivery quantity, storage time, number of products and site constraints establish the vessel requirement.
Select Vessel & Flow Design
AST and CMT coordinate diameter, hopper angle, support arrangement, outlets and mass-flow or funnel-flow requirements.
Engineer the Interfaces
Fill piping, venting, pressure protection, level controls, gates, flow aids and feeders are selected around the vessel.
Connect the Process
Conveying, weighing, controls, loadout and downstream equipment are coordinated into the final operating system.
See CMT Silo System Engineering in Real Applications
CMT's broader silo-system page includes examples involving hydrated lime, railcar unloading, composite production and difficult-flow wood-chip storage.
These examples demonstrate how filling, flow, feeding, pneumatic conveying, weighing and controls affect the design of a complete storage system.
Frequently Asked Questions About Bolted Dry Bulk Silos
What is a bolted dry bulk silo?
A bolted dry bulk silo is an engineered storage vessel assembled from prefabricated steel panels at the job site. Bolted construction reduces many of the transportation constraints associated with delivering a large one-piece welded vessel and can provide flexibility for larger capacities, restricted sites and multi-silo installations.
When should I choose a bolted silo instead of a welded silo?
Bolted construction is often considered when the required silo size is difficult to ship as one piece, when site access is constrained, or when a project benefits from panelized field erection. Welded silos can still be an excellent choice where transportation and crane access allow a substantially completed vessel to be delivered to the site.
What materials can AST dry bulk silos handle?
AST literature identifies applications including sand, cement, fly ash, plastics, wood chips, coal, carbon black, soda ash, urea pellets, coke, activated carbon, lime, silica and alumina. Final vessel, coating, hopper and discharge design should always be confirmed for the specific bulk solid.
What hopper slopes are available for AST dry bulk silos?
AST currently identifies dry bulk hopper slopes from 45 degrees through 70 degrees. The appropriate slope depends on the stored material, outlet arrangement and required flow pattern; hopper angle should not be selected in isolation from the material properties.
What is the difference between mass flow and funnel flow?
Funnel flow creates an active channel through the material while some solids near the walls can remain stagnant. Mass-flow vessels are designed so the bulk solid moves along the walls during discharge. The right approach depends on flowability, residence time, segregation, product degradation and operating requirements.
Can CMT supply the equipment around the AST silo?
Yes. Carolina Material Technologies can help coordinate truck or rail receiving, fill piping, bin vents, pressure and vacuum protection, level controls, flow aids, gates, rotary valves, feeders, weighing, pneumatic or mechanical conveying, blower packages and controls as required by the project.
What information should I provide for a bolted silo quote?
Helpful starting information includes the material name, loose and settled bulk density if available, required storage capacity, delivery quantity, fill method, receiving rate, required discharge rate, particle size, moisture, known flow issues, available footprint, height restrictions and any site drawings or photographs.
Planning a Bolted Dry Bulk Silo Project?
Send Carolina Material Technologies your material, storage capacity and how the product enters and leaves the silo. We'll help define the AST vessel and the equipment required around it.
Helpful RFQ information
- Material name
- Bulk density
- Storage capacity
- Number of silos
- Truck / rail / plant fill
- Receiving rate
- Discharge rate
- Available footprint
- Height restrictions
- Known flow issues
- Material temperature
- Site drawings / photos