EN 1712:1997

Non-destructive examination of welds - Ultrasonic examination of welded joints - Acceptance levels

Publication date:   Jun 11, 2004

General information

99.60 Withdrawal effective   Dec 15, 2010


CEN/TC 121 Welding and allied processes

European Norm

25.160.40   Welded joints and welds



Language in which you want to receive the document.


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 25817, respectively. Other acceptance levels can be used by agreement between the contracting parties. An acceptance level corresponding to level D of EN 25817 has not been included in this standard as ultrasonic examination is not recommended for this weld quality. These acceptance levels are applicable to examinations carried out in accordance with the standards referred to in EN 12062. They can, however, be applied in conjunction with other rules, where the same types of reference reflectors for sensitivity setting are used, provided it is agreed between the contracting parties. The standard is applicable to the examination of full penetration ferritic steel welds, with thicknesses from 8 mm up to 100 mm. It can also be used for other types of welds, materials and thicknesses above 100 mm, provided the examinations have been performed with necessary consideration of the geometry and acoustical properties of the component and an adequate sensitivity can be employed to enable the acceptance levels of this standard to be applied. The nominal frequency of probes used in this European Standard is between 2 MHz and 5 MHz unless attenuation or requirements for higher resolution call for another frequency. The use of these acceptance levels in conjunction with frequencies outside this range needs to be considered carefully.

Related legislation

Legislation related to this standard


Pressure equipment

Life cycle


EN 1712:1997
99.60 Withdrawal effective
Dec 15, 2010


EN 1712:1997/A2:2003

EN 1712:1997/A1:2002


EN ISO 11666:2010