Solutions · Polypropylene Storage
Polypropylene is produced, compounded, and processed in large volumes and many grades – from homopolymer and copolymer to compounds and blends. PW Silo Systems designs aluminum and stainless steel storage, blending, and process silos for PP pellets and powder.
Polypropylene Storage at a Glance
A polypropylene silo stores PP pellets or powder between production, compounding, and processing. Pellets must keep their quality and functionality until they are processed – the silo protects them from contamination and feeds them reliably to the next step.
PP plants handle large volumes, many grades and blends, and powders with explosion risk. PW Silo Systems combines storage silos, seal-welded panel silos, blending and homogenizing silos, and process silos into one system that fits your production layout.
Why Polypropylene Is Demanding
Volume, consistency, and safety decide how a PP silo system is built.
Polymer production and compounding need large storage capacities – often more than a road-transportable silo can hold.
Production lots differ, and a silo filled in batches forms layers of different quality.
In coated carbon steel silos, flaking paint and rust particles can end up in the polypropylene.
Fine polypropylene powder is combustible. Filling and conveying release dust into the silo and its surroundings.
Some processes require pellets to be degassed, deodorized, or dried before further processing.
PP/PE, PP/PA, PP/PS, and PP/ABS blends and compounds must keep their composition.
Silo Materials
We build silos exclusively in aluminum and stainless steel. Both materials offer high corrosion resistance and a long service life – without a coating as the only protection against corrosion.
Which of our two materials fits your polypropylene silo depends on your product, your process, and your site. We review it with you.
Your Polypropylene Silo System
Storage silos, panel silos, blending silos, process silos, filtration, and safety equipment are engineered as one system. That means fewer interfaces for your team.
Storage
Concentric mass-flow discharge without asymmetric flow zones – as standard, site-assembled, indoor, or multi-compartment silos.
Learn moreLarge Volumes
Seal-welded panel silos up to 53,000 ft³ for petrochemicals, plastics, and recycling.
Learn moreBlending
Blending and homogenizing of polymer pellets with PW PipeBlend and PW CentralPipeBlend.
Learn moreProcess
Process silos for deodorizing, degassing, and drying.
Learn moreFiltration
Dust separation during filling and conveying.
Learn moreSafety & Monitoring
Rupture discs or explosion vents for combustible dust, level measurement for reliable monitoring of the silo content.
Learn morePolypropylene Grades
Products marked “Tested in our lab” are on our list of bulk materials. The others we review with you based on your material data before designing the silo.
Tested in our lab
Polypropylene pellets (PP), PP granules
Polypropylene pellets are on our list of bulk materials tested in our lab.
Tested in our lab
Polypropylene powder (PP)
PP powder is on our tested list. Explosion protection and dust collection are planned with you.
Tested in our lab
Polypropylene homopolymer
PP homopolymer is on our tested list.
Tested in our lab
Polypropylene copolymer
PP copolymer is on our tested list. A dedicated silo keeps it apart from homopolymer grades.
Tested in our lab
PP compound, filled PP
PP compound is on our tested list. Blending silos even out lot-to-lot variation.
Tested in our lab
PP/PE, PP/PA, PP/PS, and PP/ABS pellets
PP/PE, PP/PA, PP/PS, and PP/ABS pellets are on our tested list.
Review with us
Recycled PP, rPP
Recyclates are on our tested list. Recycled PP we review with you based on your material data.
Also tested in our lab:
Send us your material data and we will review the right solution with you:
Material Check
Type in your polymer or any other bulk material to see whether it has already been tested in our lab. The list covers 287 bulk materials.
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Service in the U.S.
With more than 40 years of experience in silo engineering, we support your polypropylene silo project from the first design discussion to commissioning. We deliver to every U.S. state and install with our own qualified personnel.
FAQ
Answers to the questions plant managers, engineers, and buyers ask most often about storing polypropylene in silos.
These PP products are on our list of bulk materials tested in our lab:
Glass-fiber reinforced PP, PP wax, EPP beads, and recycled PP we review with you based on your material data.
Seal-welded PW PanelLine silos reach capacities of up to 53,000 ft³. Their prefabricated components travel in standard containers or on curtain-side trucks – no oversize transport permits – and are assembled on site.
PW BlendLine silos blend and homogenize polymer pellets – with PW PipeBlend or PW CentralPipeBlend, depending on your product and throughput.
PW ProcessLine process silos are designed for deodorizing, degassing, and drying. We review your process requirements with you.
Fine polypropylene powder is combustible. For combustible bulk solids we supply explosion-protected silos designed in accordance with applicable codes and regulations. Venting devices – rupture discs or explosion vents – are selected for your silo, your product, and your application.
Both are possible. Which material fits your polypropylene silo depends on your product, your process, and your site. We review the options with you.
Yes. We deliver to every U.S. state and support your project with silo transport, field assembly, silo installation and supervision, and site relocation of existing systems.
Very likely. Our silo systems are designed for nearly all free-flowing, granular, and powdered bulk solids. Send us your material details – kernel size, moisture, and how the product is filled and discharged – and we will review the right storage solution with you.
Tell us about your polypropylene grades, required storage capacity, how the silo is filled and discharged, and your site conditions. Based on this, we work out the material, silo type, and configuration with you and send you a detailed quote.
Your Project
Whether you need a single polypropylene silo, a large panel silo, or a complete system with blending and process silos, tell us about your requirements. We'll develop a solution that fits your product, your process, and your site.
Send a Request NowWhat Happens Next
Tell us about your bulk material, your process, and your site conditions.
We work with you on material, silo type, and configuration – based on a bulk material analysis if needed.
You receive a custom-engineered solution with a detailed quote.
