Dimensions, markings and instructions Portaria 499 December 20 th . 2021 Item 4.1.9 / 4.2.2 Volumetric capacity Portaria 499 December 20 th . 2021 Item 4.1.7 Pressure regulating valve and safety valve Portaria 499 December 20 th . 2021 Item 4.1.4 Hydrostatic resistance pressure Portaria 499 December 20 th . 2021 Item 4.1.6 Safety valve operating pressure Portaria 499 December 20 th . 2021 Item 4.1.6 Metal adhesion test (grid test) internal coating Metal adhesion test (grid test) external coating Portaria 499 December 20 th . 2021 Item 4.1.8 Abrasion resistance test Portaria 499 December 20 th . 2021 Item 4.1.8 Utensil adhesion test with egg Portaria 499 December 20 th . 2021 Item 4.1.8 Corrosion test with boiling sodium chloride solution Portaria 499 December 20 th . 2021 Item 4.1.8 Polymeric parts Portaria 499 December 20 th . 2021 Item 4.1.5 Fixing of thermodiffuser by impact process Portaria 499 December 20 th . 2021