A finite element analysis showing equivalent stress on a preheater tube plate.

Quality-stamped projects provide peace of mind

Citec’s high-end calculation experts provide peace of mind; customers can rest assured knowing that the design they have ordered complies to valid norms and standards – and that all parts of a plant or mill can withstand heavy storms, massive snow falls, as well as earthquakes.

Jessica Winslow determines which material is best suited for different structures.

Jessica Winslow, Project Leader, Engineering Consultancy, joined Citec in spring 2018 and is based at Citec’s office in Karlstad, Sweden. With a degree in mechanical engineering and a calculation background from a Swedish engineering company, Winslow feels she is in her right element. She enjoys Citec’s small flat organisation in Sweden, where everyone has the opportunity to have a say. The fact that you have the large global Citec Group in the background adds credibility – you can always find the right expert for any situation.

At the moment Winslow is involved in a paper mill conversion for the customer Ahlstrom Munksjö Paper AB Billingsfors Bruk. An additional fifth digester is being added to the mill to increase production capacity. Winslow prepares the stress calculations for the new piping system and equipment to determine which material that should be used. For stress analysis and calculations, Winslow generally uses ROHR 2 and Visual Vessel Design.

It’s important to fully understand the customers and to be aware of their needs – and to be able to reassure them that Citec are truly there for them.

In addition to stress calculations, Winslow is also part of the team responsible for project management in the current conversion project. She is also called upon to assist her colleagues in other Citec countries with calculations. Her wide role does not bother her; quite the contrary, in fact. “I love my job. It’s important to fully understand the customers and to be aware of their needs – and to be able to reassure them that Citec are truly there for them. With our large global organisation, we are flexible and can make sure we attend to our customers properly. That’s what quality is all about,” concludes Winslow.

Down to details

Whereas Winslow has a more overall approach to calculations, Magnus Gruvholm, Senior Expert, Engineering Consultancy, takes analysing to the detailed level. Gruvholm started with secondary steel calculations and earthquake load analysis when he first joined Citec in 2013. Now he works as a calculation specialist for the customer Valmet Fiber at their cooking and causticizing centre in Karlstad.

Magnus Gruvholm makes sure all parts of a structure can withstand internal and
external pressures.

Gruvholm calculates dimensions for pressure vessels, tanks and different types of mechanical machineries to make sure they withstand internal and external pressures, high temperatures and external loads. If the pressure vessel is located outside a building, it is necessary to take wind and snow loads into consideration.

Our calculation work can be seen as a quality stamp. The design Citec’s customer receives fulfils the rules and regulations on the market it is intended for.

Gruvholm uses different software for different types of analysis; in Visual Vessel Design, he can analyse standard components for pressure vessels and pipe systems and decide the required dimension and material. For pressure vessel calculations or component analysis where the geometry is more complicated or not a standard component, the analysis is performed with Ansys, a software for finite element analysis (FEA).

A large part of both Winslow’s and Gruvholm’s work is to ensure compliance with international norms and standards. They need to be followed meticulously to avoid any problems at commissioning. It is a question of knowing what kind of documentation is needed, what tests need to be run, etc.

“Our calculation work can be seen as a quality stamp. The design Citec’s customer receives fulfils the rules and regulations on the market it is intended for,” states Gruvholm.

 

Want to know more? Contact us!

Kenneth Lovidius
Director, Engineering Consultancy Europe
kenneth.lovidius@citec.com

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