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Description / Abstract:
This practice2 covers a procedure for magnetic
particle examination of steel forgings. The procedure will produce
consistent results upon which acceptance standards can be based.
This practice does not contain acceptance standards or recommended
quality levels.
Only direct current or rectified alternating (full or half wave)
current shall be used as the electric power source for any of the
magnetizing methods. Alternating current is not permitted because
its capability to detect subsurface discontinuities is very limited
and therefore unsuitable.
Portable battery powered electromagnetic yokes are outside the
scope of this practice.
NOTE 1-Guide E709 may be utilized for magnetic particle
examination in the field for machinery components originally
manufactured from steel forgings.
The minimum requirements for magnetic particle examination shall
conform to practice standards of Practice E1444/E1444M. If the
requirements of this practice are in conflict with the requirements
of Practice E1444/E1444M, the requirements of this practice shall
prevail.
This practice and the applicable material specifications are
expressed in both inch-pound units and SI units. However, unless
the order specifies the applicable "M" specification designation
[SI units], the material shall be furnished to inch-pound
units.
The values stated in either SI units or inch-pound units are to
be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall
be used independently of the other. Combining values from the two
systems may result in non-conformance with the standard.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
2 For ASME Boiler and Pressure Vessel Code
applications see related Method SA-275/SA-275M in Section II of
that Code.
*A Summary of Changes section appears at the end of this
standard