DIN 28055 Organic Primers to be Applied to Metallic Components for Use in Process Engineering

The standard “DIN 28055 Organic primers to be applied to metallic components for use in process engineering”, developed by the German Institute for Standardization (DIN), consists of the following subsections published under the same title:

• The standard “DIN 28055-1 Part 1: General requirements” applies to vessels, equipment, piping components and other structures made of metal (bearing) materials in process plants that have an organic lining and are in contact with the medium.

This standard was later replaced by the standard “EN-14879-4 Organic coating systems and primers for the protection of industrial equipment and installations against corrosion caused by aggressive environments - Part 4: Primers on metallic components”.

This new standard describes the requirements and test methods for organic linings applied to metallic process engineering equipment that will come into contact with chemicals. The requirements specified here can be used for quality control purposes.

This standard applies to linings that serve one or more of the following purposes:

• Protecting the component from the negative effects of aggressive substances
• Protecting water (e.g. groundwater) from harmful substances
• Preventing contamination of the load by components released from the substrate material
• To obtain a certain surface quality.

This standard applies to vessels, devices, piping and other components for process plants made of metallic substrate materials, provided with the following types of surface protection:

• Pre-manufactured, natural or synthetic rubber-based covers (rubber lining) to be applied in the workshop or on the construction site
• Prefabricated, phenol formaldehyde or epoxy resin based covers (duroplastic primer) to be applied only in the workshop
• Pre-fabricated thermoplastic products (e.g. foils, sheets, plates, pipes) to be applied in the workshop or on site (thermoplastic primer)

This standard specifies the requirements, acceptance inspection, packaging, handling, storage, installation, and external finish of organic liners for metallic materials. The tests described in this standard are intended to verify the suitability of the coatings used on the liners and to be performed as part of acceptance inspections performed on products during or after the application of the liners or as part of routine inspections to identify changes to the liners during service.

• The standard “DIN 28055-2 Part 2: Proof of conformity and test” applies to vessels, equipment, piping components and other structures made of metal (bearing) materials in process plants that have an organic lining and are in contact with the medium.

This standard was later replaced by the standard “EN-14879-4 Organic coating systems and primers for the protection of industrial equipment and installations against corrosion caused by aggressive environments - Part 4: Primers on metallic components” described above.

In short, DIN 28055 is a standard for the surface protection of metallic components in chemical devices with organic coatings. This standard focuses on the requirements for the application, inspection, handling, and installation of organic coatings on objects such as vessels, pipes, and other equipment used in chemical plants.

The first part of this standard specified design, material, and construction requirements, while the second part covered proof of conformity and testing. This standard was discontinued in 2008 and subsequently replaced by EN 14879-4 , which reflected updates aligning with European Union norms.

The DIN 28055 standard is considered important in the following respects:

• Provides chemical resistance and longevity of coated equipment.
• It minimizes corrosion-related failures by increasing safety and reliability.
• Provides uniform criteria for the application of coatings and post-coating operations.

The EN 14879-4 standard is considered important because it provides detailed specifications and requirements for internal coatings of process vessels, equipment, and secondary containment in environments where aggressive chemicals are present. This standard is important for the following reasons:

• Chemical resistance assurance: Ensures that thermoplastic coatings used inside tanks, vessels, pipes and other equipment are resistant to the chemical effects of corrosive substances such as acids, bases and solvents.
• Safety and environmental protection: Appropriate coatings prevent the leakage of hazardous chemicals, reducing risks to workers, the environment and nearby communities.
• Long equipment life: By specifying design, material selection and application processes, the standard helps maximize the life of industrial infrastructure exposed to chemical stress.
• Industry-wide consistency: Provides a common technical language and requirements that improve quality control and interoperability among manufacturers, contractors, and customers.
• Quality assurance: Ensures that coatings meet stringent performance requirements by defining testing, inspection and acceptance criteria.
• Compliance and certification: Using the EN 14879-4 standard helps companies comply with European legal regulations, such as environmental laws, and may be required in public or industrial project specifications.

Typical applications of this standard include:

• Chemical processing tanks
• Wastewater treatment plants
• Pharmaceutical production
• Food industry equipment (if chemical cleaning is involved)
• Secondary protection structures

For businesses that specify, design, or maintain equipment for chemical environments, EN 14879-4 is a critical standard for ensuring durability, safety, and regulatory compliance. This is particularly true for businesses concerned with organic coatings applied to metallic components, or protective coatings or layers applied to metal surfaces such as tanks, pipelines, or vessels to prevent corrosion or deterioration caused by aggressive chemical environments.

Our organization, which has been supporting businesses across all sectors for years through a wide range of testing, measurement, analysis, and evaluation activities, has a strong team of employees who closely follow global developments in science and technology and are constantly improving themselves. In this context, we also provide testing services in accordance with the DIN 28055 standard for "Organic primers for use in process engineering."