Professional welding of stainless steel for permanent connections in industry, medical technology and pipe installation.
STW is your partner for demanding welding projects – with certified welders, state-of-the-art TIG and MIG welding technology and documented quality.
Qualified welders
Certified specialists for TIG, MIG and manual welding.
Perfect welds
Experience in sensitive industries
from the food and pharmaceutical industries to medical technology and vehicle manufacturing.
Documented quality
Each suture is inspected, randomly sampled under an endoscope, and documented in a revision-proof manner as agreed.
Safety in the process
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TIG welding (tungsten inert gas)
The most precise welding method for stainless steel sheets, especially for thin-walled components. You benefit from smooth, uniform seams that are hygienically safe and easy to clean – perfect for the food, pharmaceutical, and medical technology industries.
MIG welding
An economical solution for larger material cross-sections or robust assemblies. Ideal when efficiency and fast processing are paramount.
Seam preparation & surface treatment
We ensure clean surfaces, controlled heat input , and precise tolerance testing. This minimizes the risk of cracks, pores, or uneven structures – resulting in welds with a long service life and stable properties. Proper preparation is essential, especially when welding stainless steel.
Hygienic welds
Our welds are designed to eliminate dead spaces. All product-contact surfaces are CIP (Cleaning in Place) compatible and meet the highest hygiene standards. Color tests according to FORCE Level C (straw yellow) confirm optimal execution without overheating.
quality check
From visual inspection and red-white staining to endoscopic checks – we ensure that every suture is documented and inspected as needed and by agreement . Photographic documentation and tamper-proof filing guarantee that you have auditable evidence at all times.
"Our components must meet the highest hygiene standards."
"We need welds without discoloration or cracks."
➜ Through controlled parameter management, the use of forming gas , and continuous monitoring of the welding processes, we achieve reproducible results. This results in high-quality welded joints that are permanently durable – free from pores, undercuts, or thermal damage.
“We work with austenitic chromium-nickel steels (e.g. 1.4404) – how do we prevent distortion?”
➜ Our specialization in stainless steels 1.4404 and 1.4301 allows us to precisely control material expansion and stresses. Through optimized heat input, preparation and post-processing, as well as tailored welding methods, we prevent distortion and ensure the dimensional accuracy of your components.
"Our projects require complete documentation."
➜ That's no problem at all. By arrangement, we will provide you with 100% documentation. Every seam is clearly marked, inspected, and documented in an audit-proof manner. From visual inspection, red-white test, and endoscopy to complete material certificates – we deliver audit-ready documentation that meets the highest quality standards.
Stainless steel welded joints remain durable and resistant to chemicals.
Certified welders, documented parameters, clearly defined procedures.
from prototypes to small series production to complex assemblies.
Less rework, less waste, seamless integration into your processes.
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1. Analysis
You send us your drawings or technical specifications. We examine the feasibility in detail, select the appropriate welding processes (e.g., TIG welding for thin-walled stainless steel sheets or MIG welding for thick-walled components), and define tolerances and parameters for the welding process. This ensures that your stainless steel welds are precisely planned from the outset.
2. Strategy
Based on the analysis, we develop a transparent offer. Adjustments are documented in an audit-proof manner, ensuring that the steps and welding methods used remain traceable at all times. For projects with high quality requirements – for example, in the pharmaceutical, food, or chemical industries – we coordinate all details regarding weld execution at this early stage.
3. Implementation
Production is carried out by certified welders specializing in stainless steel. Whether TIG or MIG welding – every process is implemented precisely according to specifications. Throughout the entire process, continuous inspections, visual checks, and documentation ensure that every weld meets the required properties: corrosion-resistant, hygienic, and durable.
4. Supervision
Upon completion of the work, you will receive, by agreement, complete weld documentation including photos, test reports, and material certificates. If desired, we can also support your company in the long term – with adjustments, modifications, or expansions of existing systems. This ensures that your stainless steel welded construction remains reliably auditable and in compliance with regulations.
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We focus exclusively on stainless steel – especially austenitic chromium-nickel steels such as 1.4404 and 1.4301. This clear focus ensures that we perfectly master the special properties and challenges of welding these steels.
From weld preparation to final inspection, we work with documented procedures. Visual inspections, red-white tests, endoscopies, and photographic documentation (upon customer request) ensure that every weld meets the highest quality and hygiene standards.
Our employees are internationally qualified – from TIG specialists and visual inspectors to international welding experts. The combination of know-how and experience guarantees reproducible results of the highest standard.
All welding processes are carried out according to relevant standards such as DIN EN ISO 3834-2 and AD 2000-Merkblatt HP 0 / HP 100 R. This means our documentation is 100% auditable – for internal quality assurance, external customer approvals, or an official testing laboratory.
Companies in the food, beverage, pharmaceutical and pipe installation industries have relied on STW for years. They value our reliability, adherence to deadlines and the combination of precision, safety and long-term process reliability.
High density of qualified individuals
Unique combination of welding and bending
While many suppliers offer either welding or sheet metal fabrication , we master both at the highest level. This means that stainless steel sheets are not only precisely bent but also welded to perfection. This allows us to produce complete assemblies from a single source – dimensionally accurate, hygienic, and without interface problems.
Process reliability instead of rework
Through simulation, prefabrication, and clear documentation, we avoid sources of error that often lead to rework and delays with other suppliers. You receive stainless steel components that are ready for immediate use and meet the highest quality standards.
Experience in demanding industries
For thin-walled stainless steel sheets, we primarily use TIG welding (tungsten inert gas). This process enables maximum precision, smooth and clean welds, and an aesthetically pleasing surface finish. For thicker components, we also use MIG welding – depending on the requirements for strength and cost-effectiveness.
Stainless steel is prone to distortion due to its thermal expansion. We prevent this through controlled heat input, careful weld preparation, the use of forming gas , and an adapted welding method. This ensures that your components remain dimensionally accurate and process-reliable – even with demanding stainless steels (e.g., 1.4404).
Yes – our welds are CIP and SIP compatible, free of dead spaces, and meet all requirements. This means: easy cleaning, maximum product safety, and ideal suitability for industries with strict hygiene standards, such as the food, pharmaceutical, and medical technology sectors.
Each weld is inspected as part of the operator's self-inspection process. Upon request and by agreement, you will receive 100% documentation. This includes visual inspection, red-white test, endoscopy, and photographic documentation, including material certificates – 100% auditable and compliant with current industry quality standards (DIN EN ISO 3834-2, AD 2000).
Our services are primarily used in the food and beverage industry, pharmaceutical and chemical pipe installation, as well as in mechanical and pipe installation . In these sectors, the highest weld quality is essential – hygienic, corrosion-resistant, and durable.