WAVE TYPES

Officer at least 30 days prior to their intended use. Approval by

the Government will in no way affect the obligation of the

Contractor to employ qualified personnel, equipment, and

procedures, and to perform the inspection as specified. The

procedure description shall include the following:

a.

Couplant.

b. Search unit characteristics including angle, size, shape,

nominal frequency, type designation.

c.

Method and type of wave.

d. Equipment and accessories including manufacturer, model

number, date of manufacture, last date of calibration, and the

manufacturer's electrical, physical, and performance

specifications.

e. Decibel (dB) compensation system for distance-amplitude

correction.

Reports containing the following information:

a. Identification and Location of Inspected Item: Name and

place of the inspected item, the person performing the inspection,

and the date of inspection.

b. Detail of Inspections: Details of methods, types of

waves used, search units, frequencies, inspection equipment

identification, and calibration data with enough information to

permit duplication of the inspection at a later date.

c. Response in Calibration: The response from the DSC or SC

block used in calibration and for acceptance/rejection in terms of

the response from the 1.524 mm 0.06 inch reference hole in the

standard IIW block (primary standard).

d. Identification of Unacceptable Areas: Locations,

dimensions, types, and area of unacceptable defects and

discontinuities giving reflections over 50 percent of the

reject/repair line. These may be noted on a sketch or marked-up

drawing.

e. Record of Repair Areas: A record of repaired areas shall

be furnished as well as test results for the repaired areas.

1.5

WAVE TYPES

The types of waves and the conditions under which they shall be used are

specified below:

1.5.1

Shear Waves

Unless conditions prohibit, shear waves shall be used. A longitudinal wave

procedure may be used instead, if approved by the Contracting Officer.

Refracted waves between 40 degrees and 70 degrees shall be used except

where different angles are indicated in approved procedures, such as for

materials less than 13 mm 1/2 inch thick, for materials with sound

velocities greater than in steel, when the weldments are not readily

SECTION 05091A

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