Page 79 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.22. QUALITY REQUIREMENTS FOR ARMATURES, FORM PARTS, PIPES, VALVES AND AGITATORS FOR THE CHEMICAL INDUSTRY

7.22.1 Application area

This norm is applicable for:
- parts of steel
- parts of cast iron
- parts of stainless steel

7.22.2 Test methods

Item Name Comparable standards
4.3 measurement of the thickness of the enamel coating EN ISO 2178, EN ISO 2360, EN ISO 1463
4.25 determination of the resistance to chemical corrosion by hot sodium hydroxide solution EN ISO 28706-4/9
4.33 determination of the chemical corrosion rate in hydrochloric acid vapour EN ISO 28706-2/13
4.34 determination of the crack formation temperature ISO 13807

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