minimum wall thickness shall not be reduced locally by more than 10%; the surface area over which the minimum wall thickness is reduced shall not exceed 1,000 cm2; the sum of all the surface areas over which the minimum wall thickness is reduced shall be less than 5% of the total surface area of the tank; the minimum permitted distance between two neighbouring areas over which the minimum wall thickness is reduced shall be not less than 300 mm; and in the case of pressurized tanks, the stress resulting from the design pressure shall be safely absorbed bearing in mind operating conditions.”
- dans le cas des citernes sous pression, la sollicitation résultant de la pression de conception doit être absorbée de façon sûre compte tenu des conditions de service. ".