Expertise

Surface treatment

Depending on the material and industrial application, BUTTING realises a wide range of requirements for interior and exterior surfaces as well as the weld seam area.

Pickling, blasting, sanding

Customised surfaces

The surface of stainless steel changes during production. Corrosion resistance can only be achieved with a clean metallic surface. The surface can be treated using chemical processes, such as pickling, or mechanical processes, such as blasting or grinding.

Chemical pickling after production is a standard procedure at BUTTING. It enables us to guarantee optimum corrosion resistance of our pipes and components.

You can also specify various other surface finishes:

Selection of primary material depending on the specified surface finish (material from cold or hot rolled strip)
Weld smoothing
Individual specifications for roughness requirements
Grinding of the outer and inner surfaces
Blasting of the outer and inner surfaces

Pickling

Our processing centre is equipped with different pickling areas and baths. Bath size, acid composition and pickling times are customised to the products to be processed. All pickling baths are constantly monitored by the BUTTING laboratory. Continuous monitoring and regular cleaning ensure uniformity and quality.

Rays

In order to fulfil particularly high demands on the inner surfaces of our BUTTING pipes, the pipes can be shot-blasted. The inner surface of the product is blasted using steel balls. Components from 4 to 12 metres in length with diameters from 114.3 to 762 mm are processed in the shot blasting machine.

Loops

We use two radial wet cylindrical grinding machines for external grinding, in which dimensions from DN 15 to 350 DN with pipe lengths of 1,000 to 12,000 mm are processed. For internal grinding, we use two axial dry cylindrical grinding machines for pipe lengths of 1,000 to 6,000 mm with an internal diameter of 50 to 140 mm and 140 to 2,000 mm.

For pneumatic conveying

Roughened inner surfaces

At BUTTING, we use different processes to achieve a pre-defined roughening of the inner surface: In shot peening , the pipe surface is compacted and roughened by vertically impacting steel balls. In the case of roughening , the inner surface of the pipe is deepened by the pressure of a toothed roller, creating a predetermined structure.

Shot-peened or roughened pipes from BUTTING offer a decisive advantage: they transport your goods particularly gently, practically without abrasion or crushing. The shape of the bulk material is retained and your pipework remains free of blockages.

To the pneumatic conveying application area

Pickling is a standard procedure

Innovative pipe pickling

In order to ensure optimum corrosion resistance of our pipes and components, chemical pickling after production is already standard practice for us. Pipe pickling is one of the most important areas of our stainless steel pipe production.

Based on decades of experience, an innovative new plant was built in 2020 that is proven to be effective in terms of pickling chemistry, neutralisation and environmental management. Here, our pipes are pickled at higher temperatures, which has a positive effect on the pickling result and reduces pickling times.

We also have pickloing facilities for components, a specialized pickling line and the option of spray pickling.

Cold-rolled primary material

Depending on the intended use, specific surface finishes are already taken into account during pre-selection. For cold-rolled primary material with wall thicknesses of up to approx. 6 mm, roughness values of max. Ra 0.5 μm are not exceeded - a prerequisite for the production of pipes for foodstuffs in accordance with DIN 11850 and drinking water pipes in accordance with DVGW worksheet GW 541.

Hot-rolled primary material

The roughness values for hot-rolled primary material are around Ra 3 to 8 μm. If higher surface requirements must be met, subsequent machining is required. For technical applications, the required Ra values for defining the product surface are sufficient for the exact realisation of your specifications.

Chemistry

We are a strong and innovative partner for the chemical industry. That's why the industry relies on our experience in stainless steel processing.

Energy

Production for the energy industry requires the highest level of reproducible quality work. The industry has long relied on solutions from BUTTING.

Vehicle construction

We process a wide range of high-performance materials - including special grades - to meet the special requirements of the automotive industry.

Food

BUTTING manufactures longitudinally welded stainless steel pipes in accordance with DIN EN 10357 for hygienic and safe food processing with the highest requirements.

Aerospace

BUTTING has been manufacturing stainless steel and titanium components for the aerospace industry since the mid-1970s - from tubes to ready-to-install assemblies.

Maritime economy

BUTTING has been manufacturing tanks and special components as well as customised piping systems for shipbuilding for the maritime industry since 1973.

Mechanical and plant engineering

BUTTING supplies customised stainless steel and special material components that meet the highest standards of quality and operational safety.

Paper and pulp

BUTTING has been supplying the paper and pulp industry with stainless steel piping and containers for decades - from engineering to assembly.

Pharmaceuticals

Our longitudinally welded stainless steel pipes in accordance with DIN 11866 and ASME BPE ensure the safe handling of sensitive and high-purity media.

Water management

Water management companies around the world trust in the durability and reliability of our stainless steel products for water and wastewater technology.