资源介绍:  

This European Standard specifies the requirements for the ultrasonic examination of spheroidal graphite cast iron castings and the methods for determining internal discontinuities by the pulse-echo technique.

This European Standard does not deal with the ultrasonic examination of the nodularity of spheroidal graphite cast irons.

This European Standard does not cover the transmission technique.

This document (EN 12680-3:2003) has been prepared by Technical Committee CEN /TC 190 "Foundry Technology", the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2003, and conflicting national standards shall be withdrawn at the latest by July 2003.

Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 4.10 "Inner defects" to prepare the following standard:
EN 12680-3, Founding — Ultrasonic examination — Part 3: Spheroidal graphite cast iron castings.

This is one of three European Standards for ultrasonic examination. The other standards are:
EN 12680-1, Founding — Ultrasonic examination — Part 1: Steel castings for general purposes.
EN 12680-2, Founding — Ultrasonic examination — Part 2: Steel castings for highly stressed components.

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