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Work in progress... Hydrotest of a pressure vessel
A hydrotest / hydro pressure test / hydrostatic test is among others a standard NDT (Non Destructive Test) and involves filling the pressure vessel with water to test for strength and leaks.
Do you want to know more about different types of NDT?
Check our website.
13 October 2022Read more
Deprest and sustainability
Sustainability is a key value at Deprest.
We naturally try to apply this value at company level like everyone else by, among other things
- generating our own energy as much as possible by means of solar panels
- limiting our energy consumption
- sorting our waste – in this respect Deprest is obviously fortunate with its waste flow, since most of our waste (metal scrap) is 100% recyclable.
In addition to these traditional ways of contributing to sustainability, the projects we work on are very often intended for sustainable projects. We regularly manufacture parts for wind farms, we make sump tanks for ships (where all waste is collected, while in the past it was simply dumped into the sea). As many of our tanks are used to make processes cleaner, we also contribute indirectly to a better, more sustainable world.
03 May 2022Read more
Filter Baskets in the spotlight
The purpose of this article is to put the production of industrial filters (which are often small pressure vessels) and more specifically associated filter baskets in the spotlight.
As a rule, these filter baskets need to be very sturdy given the flow rates, pressures (and the occasional less gentle treatment by technicians) they have to withstand. This means that, notably when assessing quotations, you should make sure that you are ‘comparing apples with apples’, so to speak.
The difference between a light and a sturdy basket version can, for example, determine whether it can be used for just 6 months or last for years.
25 October 2021Read more
Perfect welding in the spotlight
There is welding and... welding. Look closely at the welds in the attached photo: perfect work, isn’t it? Whether the process used is manual welding as shown in this photo, or submerged arc welding, plasma keyhole welding, automatic or semi-automatic welding – to name but a few – not only do our welds always look impeccable; various NDT testing methods such as RX, MT, and more, also confirm it.
How come Deprest’s welding is of such high quality?
25 June 2021Read more
A sump tank is a holding tank where all the waste produced at sea is collected. The waste that used to be simply discharged into the sea is now collected and brought ashore without polluting.
This sump tank is double walled (stainless steel and steel) and built according to standards EN12285-2 - ASME VIII - EN 1993-4.It also complies with finishing standard P3.
No, your eyes are not deceiving you: this tank has a diameter of 3200 mm and a length of 15500 mm.
04 May 2021Read more
In the autumn Deprest contributed to an artistic project, which consisted in an aluminium structure for a major show.
The structure involved one large central ring with a diameter of 8 metres and 4 hinged metal legs.
Watch the video to get a good feel of what went on in our workshop. It also demonstrates how the articulations of the structure were tested.
28 June 2020Read more
Obviously, skilled people and state-of-the-art machinery are the beating heart of a company, and, fortunately, Deprest has both.
Yet, the many PQRs accumulated by Deprest over the years are another asset that shouldn't be underestimated in our sector.
(W)PQR stands for (Welding) Procedure Qualification Record and is a standardised procedure for welding certain materials, positions and thicknesses as a certified workshop. Welding Procedure Specifications (WPS) are supported by the PQRs.
The approval of a PQR is done by and under the supervision of an external inspection body and can quickly reach a cost of 3,500 euros or more per qualification, not including the company's own costs (such as joint preparation and welding time). Considering that, as a workshop, Deprest has over 100 PQRs, you do the math...
31 March 2020Read more
Pressure vessel in the spotlight
Appearances can be deceptive: this pressure vessel was rather complex
The specifications are:
- 25 bar
- 1000 litres
- manufactured to EN13445 standard
- compliance with PED2014/68/EU CAT IV mod G
The complexity of the project stemmed from the customer’s requirement to be able to look into the pressure vessel at any height. Deprest resolved this problem by placing three sight glasses at three different levels.
26 March 2020Read more
Submerged Arc Welding (SAW)
SAW welding - Submerged Arc Welding
Various names for the same process.
This is an automated arc welding process, which involves feeding a wire, just like with an electrode, but in which the coating of the electrode is replaced by a protective powder. The machine applies a blanket of granular fusible material on the work just before the welding process, and sucks it up again once it is completed.
It is a very powerful welding process, also allowing high welding speeds. It is especially suitable for longitudinal and circumferential seams, especially when multiple passes are necessary.
23 January 2020Read more