NS-EN ISO 11666:2010

ADOPTED_FROM:EN ISO 11666:2010 This European Standard specifies ultrasonic acceptance levels, 2 and 3, for full penetration welded joints in ferritic steels, which correspond to the quality levels B and C of EN ISO 5817. Other acceptance levels can be used by specification. An acceptance level corresponding to level D of EN ISO 5817 has not been included in this standard as ultrasonic testing is generally not requested for this weld quality. These acceptance levels are applicable to testing carried out in accordance with EN 1714. The standard is applicable to the examination of full pe¬netration ferritic steel welds, with thicknesses from 8 mm up to 100 mm. It can also be used for other types of welds, materials and thick¬nesses above 100 mm, provided the exami¬nations have been performed with necessary consi¬deration of the geometry and acoustical properti¬es of the compo¬nent and an adequate sensitivity can be employed to enable the acceptan¬ce levels of this standard to be applied. The nominal frequ¬ency of probes used in this European Standard is between 2 MHz and 5 MHz unless attenuation or require¬ments for higher resolu¬tion call for another frequen¬cy. The use of these acceptance levels in conjunction with frequen¬cies outside this range needs to be considered carefully.