Pangang orders continuous galvanizing line from Siemens

• Production capacity 450,000 metric tons per annum

• Line processes high-strength cold strip for the automotive industry

• Hot-dip galvanizing, galvannealing as well as aluminizing on one line as a first in China

The Chinese Pangang Group has given Siemens Metals Technologies an order to supply a new continuous galvanizing line for its Chongqing plant. The line will process 450,000 tons of high-strength cold strip per annum for use in the automotive industry. For the first time in a Chinese plant, strips will be able to be optionally hot-dip galvanized with GI and GA coatings or aluminized on a single line. The project is scheduled to be completed by the middle of 2015.

Siemens will plan and supply the complete mechanical and electrical equipment as well as the automation for Pangang's continuous galvanizing line in Chongqing. The galvanizing line will coat deep-drawing steels, hot-formed and high-strength steels, as well as dual-phase steels with strip thicknesses ranging from 0.5 to 3.0 millimeters, and widths from 800 to 1,600 millimeters. The maximum coil weight will be 34 tons. The total achievable coating thicknesses of both sides will lie between 50 and 350 grams per square meter.

The scope of delivery from Siemens will start at the coil feed and the entry section with a double pay-off reel, followed by a Siemens type LW21 laser welding system with strip centering. Both welding and cutting operations are carried out with laser technology. The laser beam is transmitted via fiber, no mirror is needed. Also, no mechanical shear is required, thus avoiding wear of cutting tools. This will produce a continuous strip, which will first pass into a 16-fold strip looper with a capacity of 430 meters. The strip will be cleaned in an electrolytic cleaning section, and then heated in an ART (all-radiant tubes) furnace. Hot-dip galvanizing will take place two coating baths, a common one for GI and GA coatings and one dedicated to aluminizing coating. An induction furnace located above the air wiping system serves for galvannealing. The coated strip will then be tempered in a cooling section. This will be followed by an intermediate looper with a capacity of 280 meters. After that, the strip will be fed to a Siroll-4Hi temper mill with a roll force of 1,200 tons and a 25 ton tension leveler. The shiftable Siroll Roll Coater will provide additional protection for the coated surfaces against corrosion and fingerprints at the last stage of post treatment.

Finally, the strip will run through a 400-meter exit looper before it is side-trimmed and its width measured. This will be followed by an inspection station, in which the strip surface quality is checked. The exit section will consist of an electrostatic oiler, a rotary shear and a single tension reel , as well as coil handling, strapping and weighing machines.

The project will be executed by a consortium led by Siemens together with Andritz Selas and Andritz China. Siemens China will be responsible for the electrical equipment and the automation as well as the local mechanical engineering content.

This press release and a press picture are available at www.siemens.com/press/pi/IMT201402527e

(Computer-animated view of the continuous galvanizing line from Siemens in Pangang´s Chongqing plant, China)

Further information about solutions for steel works, rolling mills and processing lines can be found at www.siemens.com/metals.

The Siemens Industry Sector (Erlangen, Germany) is the world’s leading supplier of innovative and environmentally friendly products and solutions for industrial customers. With end-to-end automation technology and industrial software, solid vertical-market expertise, and technology-based services, the Sector enhances its customers’ productivity, efficiency, and flexibility. With a global workforce of more than 100,000 employees, the Industry Sector comprises the Divisions Industry Automation, Drive Technologies and Customer Services as well as the Business Unit Metals Technologies. For more information, visit www.siemens.com/industry

The Metals Technologies Business Unit (Linz, Austria), part of the Siemens Industry Sector, is one of the world’s leading life-cycle partners for the metals industry. The Business Unit offers a comprehensive technology, modernization, product and service portfolio as well as integrated automation and environmental solutions covering the entire life cycle of plants. For more information, visit www.siemens.com/metals

Based on Siemens information