文档介绍：2010 SECTION V ARTICLE 16
TABLE T-1623 Alternate techniques will be required to handle variables
REQUIREMENTS OF AN MFL EXAMINATION exceeding those specified in the procedure.
PROCEDURE (b) Cleaning may be plished using high-pressure
Non- water blast or by sandblasting. If the material is coated
Essential Essential and the coating is not removed, it shall be demonstrated that
Requirement Variable Variable the MFL equipment can detect the specified imperfections
Equipment manufacturer/model X . . . through the maximum thickness of the temporary sheet or
Sensor type: manufacturer and model X . . . coating.
Scanning speed/speed range X . . . (c) If a temporary sheet or coating is applied between
Overlap X . . . the scanner and plate to provide a smooth surface, for
Lift-off X . . .
Material examined X . . . example, on a heavily pitted surface, it shall be demon-
Material thickness range and dimensions X . . . strated that the equipment can find the specified imperfec-
Reference specimen and calibration X . . . tions through the maximum thickness of the temporary
materials sheet or coating.
Software X . . .
Evaluation of indications X . . .
Surface conditioning X . . .
Coating/sheet thickness X . . . T-1650 CALIBRATION
Performance demonstration requirements, X . . . The MFL equipment shall be recalibrated annually and
when required
Scanning technique (remote control/ . . . X whenever the equipment is subjected to major damage
manual) following required repairs. If equipment has not been in
Scanning equipment/fixtures . . . X use for 1 year or more, calibration shall be done prior to
Personnel qualification requirements . . . X first use.
T-1660 EXAMINATION
T- Procedure Qualification. When procedure (a) Areas to be examined shall be scanned in accordance
qualification is specified, a change of a requirement in with a written procedure. Each pass of the sensing unit shall
Table T-1623 identified as an essential variable shall be overlap