Stainless Annealing and Pickling Lines
Stainless Annealing and Pickling Lines


Stainless Lines combine the traditionally separate processes of annealing and pickling, skin passing, and leveling in one integrated line.

Primetals Technologies’ Stainless Annealing and Pickling Lines (APL) include various combinations of processes, such as annealing, pickling, skin passing, and leveling, and can be designed for hot-rolled and/or for cold-rolled products.


Primetals Technologies' terminal and mechatronic equipment have been specially designed to process stainless steels, focusing on the highly demanding surface finish. The annealing section is of tunnel type furnace with unfired pre-heat first stage, fume heat recovery, high-efficiency and low-NOx burners. The chemical section features high-turbulence tanks, electrolytic tanks, and brush scrubbers. For hot-rolled products (HAPL), shot blasting equipment and a Scale Breaker are installed between the furnace and pickle section to help with oxide removal. For cold-rolled products (CAPL), a multistage cleaning section is installed upstream of the furnace.

Main benefits

  • High maximum process speed
  • Low operating costs
  • Multistage cleaning section with spray and brushes and cascade rinsing
  • High-efficiency and low-NOx burners
  • Fume heat recovery
  • Shot blasting with frequency-controlled wheels
  • Optimum pickling: high turbulence and electrolytic pickling tanks
  • Strip surface finish quality with 2 highly polished Skin-Pass Mill rolls with in-line roll polishers

Mechatronic machines for Stainless Annealing and Pickling lines

In-house mechatronic machines designed, assembled and tested in our Primetals Technologies workshops:

  • Wet or Dry Tension Leveler and Scale Breaker (more than 400 references worldwide)
  • 2-Hi Skin-Pass Mill with automatic roll change and polishing unit
  • Turret-type Side Trimmer, EdgeMon® (edge monitoring), and Scrap Chopper



Complete automation and process control for Stainless Annealing and Pickling Lines

Plant productivity and product quality are substantially depending on the quality of plant automation, process control, and available process optimization functions. To get the best performance out of a plant, Primetals Technologies provides add-on specific optimization solutions for further improvement of production efficiency and strip quality, besides standardized high performance automation system.

Throughput maximization with:

Excellent Strip quality with:

Lifecycle Services — improve performance while reducing costs

Service and support from a single source – fast, experienced, reliable

As your lifecycle partner, we provide you with comprehensive operational support, which helps you operate your plant at the lowest cost possible. Our portfolio includes maintenance and repair services as well as the fast delivery of original manufacturer components, produced in-house according to the highest standards of quality.

We fully integrate maintenance organizations into our customers’ organizations, thereby proving what it means to be a true lifecycle partner. The result of this win-win relationship between steel plant operators and Primetals Technologies is continuous improvement in equipment performance, product quality, and total cost of ownership.

Our customers can rely on fast and uncomplicated support in the event of an unexpected component breakdown, wherever their facility may be located. Backed by global resources and a worldwide supplier chain, we can promptly provide you with top-quality original spare and wear parts at competitive prices. We keep a range of key parts in stock to ensure their fast availability.

Want to know more? Go to Primetals Technologies Lifecycle Services Site

Integrated Plants & Solutions for continuous stainless steel lines — Experience that Matters

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Get striking results with incremental investments

NameShort Description
Integrated Solenoid Valve (ISV) Spray System ISV Roll coolant spray bars for hot and cold rolling mill strip flatness control
EdgeMon Inspection of side-trimmed strip edge surface for steel pickling and processing lines and aluminum rolling
Mulitpas Physical equipment for simulation of annealing process

Reference Story: High-productivity stainless steel cold rolling complex

Sumitomo Metal Industries Ltd., Kashima, Japan

Plant type
Annealing and Pickling Line for Stainless steel

Technical Data
Strip thickness: 2.0 – 5.0 mm
Exit Strip width (Max): 1300 mm
Line Speed (Max): 32 m/min

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