News

Craftsmanship in Focus

Welder working on high-quality pipeline

The photo shows a welder working on the inside of a large pipeline. The striking light effect from the welding process illuminates the circular shape of the tube, giving the image an almost graphic appearance.

04 December 2025

Submerged Arc Welding (SAW)

Submerged Arc Welding (SAW)

known in Dutch as onderpoederdeklassen or welding under flux — is one of Deprest’s key welding processes for pressure vessels and heavy steel components.

20 November 2025

Plasma Arc Welding (PAW)

precision and control in stainless steel fabrication

For stainless steel pressure vessels, weld quality and precision are key.

At Deprest, we use Plasma Arc Welding (PAW) to achieve both — combining high energy density with exceptional process stability.

30 October 2025

Deprest: A Name with History, A Mission to Impress

At Deprest, we're proud of our name — and everything it stands for. While we’ve occasionally heard that we could just as well be called "Impressed", our name remains firmly rooted in our origins. It was our founder, Armand Deprest, who started the company in 1936, and since then Deprest has grown into a respected name in the world of pressure vessels.

09 October 2025

SAW welding at Deprest

At Deprest, we apply advanced welding techniques to guarantee the highest quality in the construction of storage tanks and pressure vessels.

One of these techniques is Submerged Arc Welding (SAW) – particularly well-suited for large and thick-walled constructions.

SAW provides:

• deep penetration and strong welds

• consistent and uniform quality

• high efficiency for large-scale projects

By combining modern technology with the expertise of our team, we deliver durable and safe solutions tailored to our customers’ needs.

25 September 2025

Where It All Begins:

Plate Rolling at Deprest

At Deprest, the journey of every project starts with precision cutting and plate rolling.

This crucial first step lays the foundation for the quality of our final products.

We can roll plates up to 40 mm thick, ensuring that every piece is perfectly shaped for its intended purpose.

We also offer cutting (including bevel cutting) and plate rolling services to third

Ready to get started? Let’s roll out your next project together!

08 September 2025

Final assembly of a stainless steel pressure vessel

All components are designed and calculated according to international standards.

• Safety, durability, and precision are at the core of every vessel we build.

 Here, our team is installing a davited manhole cover – a hinged access point for safe inspection, cleaning, and maintenance.

01 September 2025

The starting point of a new pressure vessel

Every vessel begins with its foundation. Here you see the base head with the supporting legs being assembled.

 At Deprest, many welds are done using automated welding systems to ensure consistency, precision, and strength. But not everything can be automated, some welds require the skill, flexibility, and experience of a qualified welder.

 From the very first weld, all work is carried out according to international pressure vessel standards, ensuring safety, durability, and long service life.

25 August 2025

A glimpse into our stainless steel workshop

Our workshop is fully equipped for stainless steel fabrication, including multiple overhead cranes for safe and efficient handling of large vessels.

The coloured weld seams you see here will still be pickled, an essential surface treatment to restore corrosion resistance after welding.

 Most longitudinal and circumferential seams are welded automatically for perfect consistency. In this case, the plasma keyhole process was used; for thicker materials, we switch to submerged arc welding. Both methods ensure deep penetration, high strength, and flawless weld quality – fully in line with international pressure vessel standards.

18 August 2025

Working with Pressure Vessels – Always Impressive!

Working with Pressure Vessels – Always Impressive!

Working with large (and small) pressure vessels never ceases to impress—especially when they are effortlessly lifted by an overhead crane, like the one in the top right of this image.

At Deprest, our workshop is equipped with 26 hoists and multiple overhead cranes, with lifting capacities of up to 64 tons per crane, allowing us to handle even the most challenging projects with ease.

From custom fabrication, calculation to final delivery, we provide top-tier pressure vessels for industries such as chemical, pharmaceutical, and food sectors, ensuring precision and reliability every step of the way.

Looking for a reliable partner? Let's talk!

02 July 2025

Changes in VLAREM Regulations

Changes in VLAREM Regulations for new liquid tanks from 2025

As of January 1, 2025, the VLAREM II 2025 edition introduces stricter regulations for storage tanks containing liquids. These changes are substantial, requiring new tanks to be designed differently than before 2025 to meet the updated safety, enviromental, and compliance standards. 

What is VLAREM? 

VLAREM (Flemish Regularion on Enviromental Permitting) sets the legal framework for enviromental and safety standards in Flanders, Belgium.
It regulates various industrial activities, including the design, construction, and operation of storage tanks. The new 2025 edition brings significant updates that companies must comply with. 

At Deprest, we closely follow these regulatory developments. With our expertise in tank manufacturing, we not only provide high-quality storage tanks but also offer guidance on how these changes may impact your installations. 

Do you have questions about how 'VLAREM II 2025-editie' affects your tanks? Consult us if needed!

02 July 2025

In Progress: Stainless Steel Pressure Vessel with Conical End

Deprest is currently working on an impressive project: a stainless steel pressure vessel with a conical bottom. The vessel is being meticulously welded both inside and out to ensure maximum strength and durability.

 In the photos, you can also spot our submerged arc welding setup in action. This technology guarantees deep, consistent welds of exceptional quality – essential for applications where reliability is critical.

 Precision fabrication, high-quality welding, and attention to detail: that’s how Deprest builds industrial solutions that truly stand out.

26 June 2025

Every vessel needs a solid saddle

For this pressure vessel subject to seismic loads, we engineered and built a stainless steel saddle using 30 mm and 45 mm thick plates.

- The design and strength calculations were done in-house by our team.

- The 30 mm thick reinforcement ribs were precisely bent in collaboration with Alinco.

- All welds were executed with multiple-layer welding, ensuring maximum strength and reliability.

Strong calculations. Solid partnerships. Proven craftsmanship.

24 June 2025

How is a pressure vessel made?

How is a pressure vessel made?

After welding the shells, we prepare the heads, weld the heads to the shells, and weld the nozzles.

Here is where the manual welding begins. Commonly used welding processes for this are TIG and MIG/MAG, including full penetration butt welds, fillet welds, and multiple passes.

High-quality certified welding is, of course, essential.

Nozzles and support legs are often welded with reinforcing pads.

Teamwork is key to ensuring every step is done with precision and care.

18 June 2025

What makes Deprest stand out?

At first glance, visitors see an efficient building and an impressive array of high-end machinery. But while these tools are essential, they are not what truly define us.

The real strength of Deprest lies in our foundation:

• Structured systems and procedures that ensure consistent quality
• Our own weld manager software tailored to the needs of our production
• Extensive technical expertise built over decades
• And above all: a committed and skilled team

 Together, these elements allow us to deliver complex stainless steel constructions with precision, speed, and reliability.

Our people don't just operate machines - they bring knowledge, care, and craftsmanship into everything we build.

03 June 2025

Did you know?

There are only two materials that are 100% recyclable for life: metal and glass. Among these, stainless steel (inox) shines bright due to its unique benefits.

• No Need for Extra Protection: Unlike other metals, stainless steel doesn’t require additional coatings or treatments to protect against rust. Its natural resistance to corrosion ensures longevity and low maintenance, making it an ideal choice for sustainable construction and manufacturing.

• Durability and Longevity: Stainless steel's inherent strength and resilience mean that products made from it last longer, reducing the need for frequent replacements and thus minimizing waste.

• Complete Recyclability: At the end of its long life, stainless steel can be fully recycled without any loss of quality. This makes it a truly circular material, contributing to a more sustainable and eco-friendly future.

• Energy Efficiency: Modern production methods are increasingly energy-efficient, further enhancing stainless steel’s sustainability credentials.

24 September 2024

Testing of vessels

A lot of inspections can be performed in our workshop.

More information on our website.

22 June 2023

A lot of work

Still a lot of work to be done

12 June 2023

A small project...

Steel thickness 25 mm - Plate rolling and multiple layer welding

01 June 2023

Series of pressure vessels...

Ready for transport

20 May 2023