Improving productivity of welding by reducing groove angle

March 17, 2015

LUT has been developing materials and technology suitable for Arctic conditions. Principles for safe and ecological design and manufacturing of structures and devices used for energy production in the Arctic have been defined in the Arctic Materials Technologies Development project.

The LUT research focuses on the properties of new high-strength steel grades suitable for Artic construction and the welding methods they require. As a result, the productivity of welding has been significantly improved through reducing the groove angle essential to welding from 45 degrees to 30 degrees without compromising quality. The new narrow groove welding means faster welding, fewer additives and fewer mistakes due to a reduced welding need.

"Strength, endurance and lightness of structures are essential in steel construction in the Arctic. In sub-zero temperatures, steel becomes fragile. You have to master steel construction. This narrower groove angle, for example, is a big step towards more sustainable and ecological production in Arctic steel construction", says Project Manager Markku Pirinen from LUT.

New methods to protect the environment

A great deal is required from materials used in the Arctic. The structures must withstand temperatures as low as -60 °C. The materials must ensure production that is both safe and economical.

The use of new high-strength steels examined at LUT in structures improves the environmental friendliness and energy and materials efficiency of Arctic steel construction. The structures developed are lighter, thinner and more durable than before, therefore reducing time, energy and raw materials consumed in manufacturing, transporting and welding materials.

"The quality and safety of products and production improve through increasing automation, because welding is more rigorously controlled", Pirinen says.

As a result of the project, a comprehensive database of steel grades used in Arctic steel construction and their manufacturers was created, which will be very useful for companies. Knowledge of different countries' approaches, cultural differences and business infrastructure also improves the competitiveness of companies operating in the region.
Arctic Materials Technologies Development is a project under the South-East Finland-Russia ENPI CBC programme 2007-2013. It has been carried out in cooperation with Central Research Institute of Structural Materials (PROMETEY) from St. Petersburg. The total budget of the project was 1.028 million euros. 70 percent of the budget came from ENPI funding and the rest through LUT, Prometey and private sector funding. At LUT, one doctoral dissertation, nine Master's theses, 12 Bachelor's theses and 22 scientific publications were written in connection with the project.

Lappeenranta University of Technology

Related Arctic Articles from Brightsurf:

Archive of animal migration in the Arctic
A global archive with movement data collected across three decades logs changes in the behaviour of Arctic animals

The Arctic is burning in a whole new way
'Zombie fires' and burning of fire-resistant vegetation are new features driving Arctic fires -- with strong consequences for the global climate -- warn international fire scientists in a commentary published in Nature Geoscience.

Warming temperatures are driving arctic greening
As Arctic summers warm, Earth's northern landscapes are changing. Using satellite images to track global tundra ecosystems over decades, a new study found the region has become greener, as warmer air and soil temperatures lead to increased plant growth.

Arctic transitioning to a new climate state
The fast-warming Arctic has started to transition from a predominantly frozen state into an entirely different climate with significantly less sea ice, warmer temperatures, and more rain, according to a comprehensive new study of Arctic conditions.

New depth map of the Arctic Ocean
An international team of researchers has published the most detailed submarine map of the Artic Ocean.

Where are arctic mosquitoes most abundant in Greenland and why?
Bzz! It's mosquito season in Greenland. June and July is when Arctic mosquitoes (Aedes nigripes) are in peak abundance, buzzing about the tundra.

What happens in Vegas, may come from the Arctic?
Ancient climate records from Leviathan Cave, located in the southern Great Basin, show that Nevada was even hotter and drier in the past than it is today, and that one 4,000-year period in particular may represent a true, ''worst-case'' scenario picture for the Southwest and the Colorado River Basin -- and the millions of people who rely on its water supply.

Arctic Ocean changes driven by sub-Arctic seas
New research explores how lower-latitude oceans drive complex changes in the Arctic Ocean, pushing the region into a new reality distinct from the 20th-century norm.

Arctic Ocean 'regime shift'
Stanford scientists find the growth of phytoplankton in the Arctic Ocean has increased 57 percent over just two decades, enhancing its ability to soak up carbon dioxide.

Spider baby boom in a warmer Arctic
Climate change leads to longer growing seasons in the Arctic.

Read More: Arctic News and Arctic Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to