2.5
CHANGES IN PROCEDURE
Should application of an approved procedure not provide for good resolution
or adequate ultrasonic penetration as specified in paragraph EQUIPMENT
QUALIFICATION REQUIREMENTS, changes in procedure or equipment such as
frequency, pulse repetition rate, angle of search unit, couplant, or
oscilloscope shall be made and approved. Adequacy of the new procedure
shall be demonstrated to the Contracting Officer. During these tests, if
any of the test system's characteristics fall below the levels listed in
paragraph EQUIPMENT QUALIFICATION REQUIREMENTS, the Government reserves the
right to require a change in procedure or equipment.
2.6
PERSONNEL QUALIFICATION AND CERTIFICATION
2.6.1
Personnel Qualification
Personnel shall be qualified to perform ultrasonic inspection, as defined
in ASNT RP SNT-TC-1A. Personnel shall be certified under ASNT RP SNT-TC-1A
and ASNT Q&A Bk C within a period of 1 year before the date of this
contract. Other qualification or certification may be accepted at the
Contracting Officer's discretion. Personnel with only an operator or
inspector trainee certification will not be considered qualified to pass
judgment on the acceptability of inspected items, but may work under the
direct supervision of a qualified ultrasonic inspector. Qualified
ultrasonic inspectors shall be able to pass judgement on the acceptability
of the item in accordance with paragraph ACCEPTANCE/REJECTION LIMITS.
2.6.2
Examinations
If the Contracting Officer doubts an individual's ability as an operator,
inspector, or supervisor, the individual shall be recertified in accordance
with ASNT RP SNT-TC-1A. The Contracting Officer may participate in
administering the examination and in evaluating the results.
2.7
REFERENCE STANDARDS
Reference standards shall be used to calibrate the inspection equipment,
test its operating condition, and record the sensitivity or response of the
equipment during the inspection in accordance with paragraph EQUIPMENT
QUALIFICATION REQUIREMENTS. The standards shall comprise a standard
reference block and working standards as described next.
2.7.1
Standard Reference Block
The standard reference block or primary standard shall be provided by the
Contractor and shall consist of the International Institute of Welding
(IIW) reference block in AWS D1.1/D1.1M, Section: Inspection, subsection,
Reference Standards. The standard reference block shall also be used in
any reinspection on the same basis as the original inspection, even though
the reinspection is to be performed by other ultrasonic instruments and
accessories.
2.7.2
Working Standards
Recognized working standards detailed with the IIW block in AWS D1.1/D1.1M,
such as the Sensitivity Calibration Block, may be used by the Contractor.
Details of their use must be included in the procedure description
submitted for approval. These blocks shall be of the same acoustical
material as the plates to be inspected, shall be suited for the applicable
SECTION 05092A
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