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Prosperity Tieh awards Andritz to supply a high-capacity pickling and galvanising line

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Author: Editorial Office

Prosperity Tieh awards Andritz to supply a high-capacity pickling and galvanising line
Signing ceremony: K.H. Lin, Chairman of Prosperity Tieh (l.), and Hubert Gapp, Sales Director Andritz Metals. Photo: Andritz

07.05.2021. Prosperity Tieh, Taiwan, has awarded Andritz to supply a new high-capacity pickling and galvanising line for hot-rolled carbon steel strip. Start-up is planned for mid-2023.

Scope of supply

The scope of supplies and services includes the terminal equipment, a laser welder and a side trimmer at the inlet, a scale breaker, the pickling section, skin-pass mill #1, a direct-fired furnace (DFF) for heat-to-coat operation, the galvanising section, skin-pass mill # 2 with tension leveler, the chemical coaters with drying section, and the electrical and automation equipment for the complete line.

The delivery will include the following sustainable Andritz solutions:

  • A new acid regeneration plant (ARP) to recycle the waste acid from the pickling line – including the proven Andritz ECOmode process which reduces CO2 emissions from the ARP by 25 %.
  • A heat recovery system for the furnace that will use hot exhaust gases from the furnace to heat the air needed for the drying process in the coating section.
  • After heat recovery, the main off-gas streams from the DFF and ARP are combined for exhaust gas treatment using a DeNOx system to minimise the NOx levels in the exhaust gas. The dryer exhaust gas system in the post-treatment section is equipped with VOC treatment (volatile organic compound emissions).


With Andritz’s sustainable technologies, this line will produce hot-dip galvanised (GI) or ZM-coated /(zinc-aluminium-magnesium) flat steel. Andritz will also provide consultancy on the production of ZM-coated material.

This order confirms the long-lasting, good relationship between Andritz and Prosperity Tieh. In 2004, Andritz delivered and successfully commissioned a push-pickling line with ARP and in 2018, a 4-high cold-rolling mill to Prosperity Tieh. Additionally, Andritz has performed various upgrades and modernisations on existing lines.

Prosperity Tieh

Established in Taiwan in 1985, Prosperity Tieh Enterprise Co. Ltd (PTEC) evolved from a traditional stripping, shearing, pipe and washer pressing mill to a manufacturer of professional hot-dip galvanised and pre-painted steel.


(Source: Andritz)