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Gränges Shanghai’s (formerSapa Shanghai) rolling mills and
process lines are running with
6 Stressometer systems,
7 MTG-gauges, 2 Strip Scanner
systems and around 30 tension
load cells.
Measurement made easy
Background
In the 1980’s Gränges Sweden installed the first
Stressometer flatness system. Two decades later
Gränges Sweden continued investing in another
Stressometer system in order to scale up production.
Also Gränges expanded internationally and set up
upgraded Stressometer systems in the Gränges
Shanghai factory.
The investments continued and in 2004 two
Stressometer systems were installed in the Tandem
Cold Mill at Gränges Sweden. Also, at this time,
Gränges carried through a MTG test installation
in one of the rolling mills at the Finspång site in
Sweden. The test resulted in very good feedback,
highlighting the potential and benefits with the
Millmate Thickness Gauging system (MTG) and
the underlying PEC measurement technology,
Pulsed Eddy Current technology. This test ended
up with the first MTG-installation in the rolling mill.
In 2004 and 2005 Gränges Shanghai installed
two Stressometer systems in CM1 and CM2
as well as a MTG in the levelling line.
In 2008 the investments continued and Gränges
Shanghai installed another two Stressometer
systems in the Tandem Cold Mill. Also MTG-gauges,
Millmate Strip Scanners and LPBT and PRT load cells
were installed in the TCM rolling mill.
The positive functions of the MTG and Stressometer
systems have resulted in so far 7 MTG-gauges and
5 Stressometer flatness systems installed in the
Gränges Shanghai mill. Further, in 2010, there were
Stressometer, MTG, Millmate Strip Scanners as well
as LPBT and PRT load cells installed in the Shanghai
CM1 rolling mill. The latest additions at Gränges
Shanghai is a Stressometer system in the hot
rolling mill and a Stressometer system in CM4.

“Granges has very good communication with ABB
and we take benefit of the technical competence
and expertise they have on flatness, thickness,
tension, width and position measurement.”
What are the main benefits with ABB Force Measurement products
and what has been achieved?
We ask Mr Chen Peng,Process Control Engineer and Mr Bengt Jansson,
Strategic Projects Manager to comment the ABB Force Measurement
products in Gränges’ hot and cold rolling mills and process lines: