Technical Cleanliness according to VDA 19 Part 1 and ISO 16232

In technical cleanliness testing, we assess contamination by small particles (metallic, non-metallic, fibres, etc.) that adhere to components and assemblies, potentially affecting the quality, safety, and durability of products.

Such contaminants may cause malfunctions, leading to the premature failure of a product assembly or, at the very least, reduced performance.

For components, the following contamination limits are specified:

• mass of contaminants per individual part or surface (gravimetric requirement),
• particle size distribution,
• maximum permissible particle size.

We perform technical cleanliness analysis on:

• plastic parts,
• metal parts,
• printed circuit boards (PCBs).

Technical cleanliness analyses are carried out according to the following standards and special requirements:

• ISO 16232:2018,
• VDA 19, part 1:2015,
• OEM-specific requirements (e.g., PV 3347),
• ZFLS N 5-1,
• WNB-881-D,
• customer-specific requirements.

Our services include:

• support in understanding standard requirements,
• technical cleanliness testing of products,
• monitoring cleanliness levels in production.

We perform cleanliness analyses using advanced measurement approaches that enable reliable particle detection and classification, ensuring compliance with current standards. For detailed particle examination, we use specialised optical equipment designed for accurate identification and categorisation.

The analysis procedure consists of two steps:

1. The component is first washed to extract particles into a solvent, which is then filtered.
   In this way, all potentially harmful particles are transferred onto the filter.
2. The particles are analysed gravimetrically or microscopically.
   They are then classified into size categories, examined under a light microscope, and sorted according to type.

Guidelines for Sending Samples for Technical Cleanliness Analysis

When sending samples, it is recommended to:

• send a representative sample,
• document the sampling procedure,
• protect the sample with appropriate packaging (do not use paper, cardboard, or foam).

For preparing a quotation, we will need:

• information about the sample: requirements, technical drawing, surface area of the part,
• specifications and standards,
• information on whether this is the first analysis of the sample or a repeat analysis (requalification).

Are you setting up your own technical cleanliness laboratory?

We represent the French manufacturer Cleanpart’ner, which produces decontamination extraction stations for washing samples.

Six chamber sizes are available in the product range, from DSS1 to DSS6.
The different chamber dimensions allow particle extraction from very small, medium-sized, or very large products in accordance with applicable standards (e.g., ISO 16232 and VDA 19).

Your contact person:
Marjetka Lotrič, Head of Sales
E-mail: marjetka.lotric@lotric.si
Telefon: +386 31 640 252