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
Welding job of thick sheets - up to 100 and 200 mm
While most of the welds laid in our workshop are between 6 to 10 mm and 20 to 30 mm, some welds are well above that. We can also weld plate thicknesses from 150 to as much as 200 mm. If a continuous weld is required, it goes without saying that a great many welding layers are necessary.
We can never afford mistakes, so you understand that the quality of the welds is all the more important. Imagine that RX testing performed on such a welded joint reveals welding defects deep inside...
28 December 2019Read more