About Us

Welcome to Silotank – Your Trusted Manufacturer of Chemical, Liquid and Drinking Water Storage Tanks , Bunded Storage Tanks, Process Vessels, Pressure Vessels and Environmental Abatement Systems

Founded in 1989 by the late John Carmichael, Silotank has grown from a small manufacturing operation to become a leading GRP and thermoplastic manufacturer based in Belfast, Northern Ireland. Today, the Carmichael family continues to be actively involved in the business, forming the core of our professional management team. We are dedicated to carrying John's legacy and delivering innovative, high-quality, and cost-effective plastic fabrication solutions.

Our wide range of products caters to various industries, including Water & Waste, Chemical, Process, Food & Drink, Pharmaceutical, Civil Engineering, Petrochemical, and Paper & Pulp. Located in Belfast, near the main port for Northern Ireland, we have the advantage of easy shipping access to the UK, Europe, and beyond, enabling us to serve customers worldwide.

At Silotank, our aim is to utilize the skills and experience of our staff, along with the latest technology, innovation, and materials, to provide exceptional products and services. We strive to meet the unique needs of customers across diverse sectors. Our commitment to unbiased recommendations means that our customers can rely on our advice, guidance, design capabilities, technology, and manufacturing expertise.

Technical Expertise: Our onsite engineers are highly experienced in the design, construction, and testing of products manufactured to the highest industry standards. Our thermoplastic tanks adhere to DVS2205:2016, BSEN12573:2000, BSEN13121:2016, ASME RTP-1:2017 and BS4994:1987 for GRP/Dual Laminate tanks. Utilizing cutting-edge technology, including CNC machining (3& 5 axis), 6m and 4m bed Butt Welding, extrusion welding, IR Butt Welding machines, and 3 axis helical filament winding we ensure precise manufacturing processes.    We also have developed a robotic tank production system which ensures higher precision, quality and a more cost effective production process.

With the aid of our in-house design program and RITA 5.1, our engineers create customized thermoplastic tanks that meet the latest codes and standards. Our designs are supported by extensive laminate testing performed by third-party composite testing labs. We provide customers with detailed fabrication drawings using Autodesk AutoCAD 2D and SolidWorks 3D software platforms, including laminate schedules and reinforcement specifications for multi-directional composite materials.

Quality: Silotank has been ISO9001 certified since 1995, and we consistently strive for improvement during the annual audit. Additionally, we are proud to be part of the Achilles UVDB accreditation. Our in-house quality procedures are integral to our success and enable us to maintain these certifications, ensuring that our products meet the highest quality standards.

We invite you to explore our website and discover how Silotank's expertise, state-of-the-art facilities, and strong partnerships with world-leading material suppliers can provide the right solutions for your specific applications.

Digestors, Silos & Tanks T/a SILOTANK is a privately owned business were the key shareholders are actively involved in the day to day operation of the business. The team is made up of experienced professionals and share over 80 years of expertise in the production of high quality thermoplastic and GRP composite equipment and products which has allowed Silotank to successfully and profitably grow from its humble beginnings.

Our Market

Silotank offer a range of products suitable for the Water & Waste, Chemical, Process, Food & Drink, Pharmaceutical, Civil Engineering, Petrochemical and Paper & Pulp industries. We are based in Belfast close to the main port for Northern Ireland which gives us a great advantage to ship across the UK, Europe and further afield.

Our Aim

Silotank aim to utilise its staff skills and experience, latest technology and materials to provide high quality products and services meeting the needs of its customer. By doing this our customers will continue to work with us knowing they can rely on our advice, guidance, design capabilities, technology and manufacturing capabilities which means our recommendations are not biased.


Our onsite engineers are experienced in the design, construction and testing of products  manufactured to DVS2205, BS EN 12573 for thermoplastic tanks and BSEN13121:2016, ASME RTP-1:2017 and BS4994:1987 for GRP/Dual Laminate tanks. Our Thermoplastic tanks are designed using our in-house design programme and RITA 5.  Our calculations are based on the latest codes and standards.  Our calculations are based on mechanical properties derived from an extensive laminate testing performed by our third party composite testing labs.  All products are manufactured using a combination of the latest in CNC machining (3 & 5 axis), 6m & 4m Butt Welding technology, extrusion welding, Agru IR Butt Welding machines and 3 axis helical filament winding technology and our latest robotic tank production system.

All tanks are designed and manufactured on an individual basis and our engineers are able to produce detailed fabrication drawings in Autodesk AutoCAD 2D and SolidWorks 3D software platforms.  The drawings including laminate schedules and reinforcement specifications required for designs involving multi-directional composite materials used in the construction of the laminates.  This design process is supported by our Laminate Theory & Netting Programme software. All drawings are issued to customers for approval prior to manufacture. 

We are able to use in-house expertise and supported by our strong partnerships with world leading material suppliers we are able to provide advice and guidance to our customers in the correct materials of construction for different applications.  Our engineers will verify that the selection of resin polymers and fibre reinforcements are suitable for the design environmental and application.


Silotank became fully certified with ISO9001 in 1995 and have continually improved each year at their annual audit. We are also part of Achillies UVDB accredited. In house quality procedures are key to both Silotanks success and maintaining these certifications.


    • Over 30 years of excellence in design, manufacture, installation
      and maintenance for chemical & liquid storage solutions.

We can find a solution to suit your needs. For more information:

Call nowCall 028 90626256

Email nowsales@silotank.com
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