Weld quality – The key to the longevity and stability of systems

the essentials in brief

• Weld quality determines durability and safety of facilities, particularly in the food sector and the pharmaceutical industry.
• The qualification of welding personnel according to Standards such as DIN EN ISO 9606 and DIN EN ISO 14732 is essential for manufacturing quality.
• test methods Visual inspection with endoscope, red-white test and x-ray testing guarantee the highest weld quality and safety in the manufacturing process.

What does weld quality mean?

The respective quality requirements in welding describe the Quality and precision of the welded joints, which are crucial for the stability of components and systems. In industries such as  the food and pharmaceutical industries High seam quality ensures compliance with strict regulations. hygiene and safety standards in the production.

Why is weld quality a challenge?

Ensuring consistent weld quality presents many companies with significant challenges. Common problems include:

1. Material deviations and tolerances – Material composition of the material to be welded, inaccuracies in wall thickness or ovality lead to uneven seams.
2. Faulty suture preparation Poor cleaning or insufficient fixing or stapling of the material impairs the quality.
3. environmental influences Drafts or temperature fluctuations during the welding process increase the risk of irregularities.
4. Inadequate testing methods – Missing or inconsistent inspections leave defects undetected.
5. Lack of qualified personnel - Only certified welders and tester They ensure consistently high quality. They can perform weld seam inspections during the process and intervene if necessary.

What happens if the weld quality is poor?

Poor weld quality can have serious consequences for production processes and equipment:

• Plant shutdowns and failures due to faulty welds.
• Leaks and contamination in sensitive industries such as the pharmaceutical or food industries.
• High maintenance costs and frequent repairs that drive up operating costs.
• Non-compliance with standards and loss of certifications.

NOTE: The quality of a weld determines not only the stability of the connection, but also the service life of the entire system.

How do we at STW ensure the highest weld quality?

We rely on a combination of test procedure, documentation and qualified personnel, in order to guarantee every weld of the highest quality.

1. Testing methods and quality assurance

Each weld can be documented and numbered upon customer request. Customers will receive 100% documentation, including pictures or videos for traceability, if required.

2. Compliance with relevant standards and certifications

3. Industry-specific solutions

In the Food and pharmaceutical industries Welds must meet special hygiene requirements. STW offers:

• welds for use in hygienic or aseptic environments.
• CIP-capable (Cleaning in Place) Welded joints for easy cleaning.
• Separation of ferritic and non-ferritic materials to avoid contamination.

Your added value through high weld quality

Companies that focus on Welded joints STW sets up systems and benefit from:

1. Significantly fewer failures through documented quality controls.
2. Increased lifespan of the systems through high-quality welded joints.
3. Reduced maintenance costs through durable and maintenance-free seams.
4. Faster project completions through certified procedures and automated documentation.
5. Customer satisfaction Our customers appreciate the transparency provided Weld documentation with image and video evidence.

FAQ – Frequently Asked Questions about Weld Quality

1. Which standards are important for weld quality?

The most important standards are DIN EN ISO 3834, DIN EN ISO 15614, DIN EN ISO 5817,  DIN EN ISO 9712, DIN EN ISO 9606 and DIN EN ISO 14732These define the quality requirements for the company, welders, processes and testing personnel.

2. How is the quality of the welds checked?

At STW, we rely on visual inspections using high-quality endoscopes and, if needed or upon customer request, on Red-white tests and radiographic tests, supplemented by regular spot checks. In addition, our welders are subject to self-inspection during the manufacturing process.

3. Why is the documentation of welds important?

Documented welds offer transparency and traceabilityCustomers receive 100% documentation, including detailed reports with images and videos, if required.

5. How should welds be inspected?

We recommend 100% visual inspection by the worker himself, as well as Random quality control checks by certified inspectors 10% of the welds as a minimum requirement.

Contact us today and benefit from the highest weld quality for your area!