Technical standards

The technical standards are incorporated in the General and Special Quality and Inspection Regulations and are based on current prevailing norms, guidelines and process sheets.

• DIN 3476-1: Valves - Requirements and tests - Part 1: Protection against corrosion by epoxy coating of coating powders (P) or liquid varnishes (F)
• EN ISO 4624: Paints and varnishes – Pull-off test for adhesion
• EN 14901: Ductile iron pipes, fittings and accessories – Epoxy coating (heavy duty) of ductile iron fittings and accessories – Requirements and test methods
• EN ISO 12944-4: Paints and varnishes – Corrosion protection of steel structures by protective paint systems - Part 4: Types of surface and surface preparation
• EN ISO 8501-1: Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings
• ISO 8130-1: Coating powders – Part 1: Determination of particle size distribution by sieving
• ISO 8139-2: Coating powders - Part 2: Determination of density by gas comparison pyknometer
• ISO 8130-3: Coating powders – Part 3: Determination of density by liquid displacement pyknometer
• ISO 8130-6: Coating powders – Part 6: Determination of gel time of thermosetting coating powders at a given temperature
• ISO 8130-7: Coating powders – Part 7: Determination of loss of mass on stoving
• ISO 8130-13: Coating powders - Part 13: Particle size analysis by laser diffraction
• EN 10204: Metallic products – Types of inspection documents
• EN ISO 2812-1: Paints and varnishes – Determination of resistance to liquids – Part 1: Immersion in liquids other than water
• EN ISO 2812-2: Paints and varnishes - Determination of resistance to liquids - Part 2: Water immersion method
• EN ISO 8502-3: Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness – Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method)
• EN 598: Ductile iron pipes, fittings, accessories and their joints for sewerage applications - Requirements and test methods
• DVGW Code of Practice G 260: Gas composition
• DVGW Code of Practice G 262: Utilisation of gases from renewable sources in the public gas supply
• DIN EN 16421: Influence of materials on water for human consumption - Enhancement of microbial growth (EMG)
• UBA: Evaluation basis for plastics and other organic materials in contact with drinking water (only in German)