AS 2207-2007 pdf free download

AS 2207-2007 pdf free download.Non-destructive testing Ultrasonic testing of fusion welded joints in carbon and low alloy steel.
Where the evaluation Sensitivity is not specified, Level 2 shall be used.
Levels 1, 2 and 3 specify a threshold sensitivity below which no discontinuities other than cracks arc reported.
Level 4 uses a number of reference levels which vary with metal thickness and requires the evaluation of discontinuitics with a reflectivity equal to, or greater than 20% of the reference level.
3.5.3.2 Evaluation sensitivity levels
The sensitivity to be used for the evaluation of discontinuities shall he in accordance with one or more of the following levels:
(a) Level 1—use the gain required to bring the signal from a 1.5 mm side-drilled hole which is at least 22 mm long, at the same beam path length as the discontinuity, to 800/. graticule height.
All discontinuities producing echoes equal to or greater than 20% graticule height shall be evaluated.
(b) Level 2—use the gain required to bring the signal from a 1.5 mm side-drilled hole which is at least 22 mm long, at the same beam path length as the discontinuity, to 80% graticule height.
All discontinuities producing echoes equal to or greater than 40% graticule height shall be evaluated.
(c) Level 3—use the gain required to bring the signal from a 1.5 mm side-drilled hole which is at least 22 mm long, at the same beam path length as the discontinuity, to 80% graticule height.
All discontinuities producing echoes equal to or greater than this amplitude shall be evaluated.
(d) Level 4—use the gain required to bring the signal from the appropriate side-drilled hole specified in Table 3.8, at the same beam path length as the discontinuity, to 80% graticule height.
All discontinuities producing echoes equal to or greater than 20% of this amplitude shall be evaluated.
NOTE: Level 4 requires the use of a number of reference holes which vary with metal thickness (see Table 3.8). Sensitivity Levels 1, 2 and 3 require the use of a 1.5 mm diameter reference hole only.AS 2207-2007 pdf free download.