PURPOSE: This Procedure details the method for performing Ultrasonic Testing by Authorised Personnel on behalf of XXXX (Pty) Ltd.
SCOPE: Applicable to all castings, forgings, and butt welds in plate, piping and vessels when the Reference Code is: • API 1104 • ASME B31.1 • ASME B31.3 • ASME III • ASME IX • ASME V • ASME VIII • ASME XI • AWS D1.1 • BS 1113 • BS 2633 • BS 3923 • BS 5135 • BS 5500 • PD 5500
DEFINITIONS AND ABBREVIATIONS: NDT UT FSH SDH DAC BWE Technique Sheet
Technician (Operator) The Company Specialized Technique
Non-Destructive Testing Ultrasonic Testing Full Screen Height Side Drilled Hole Distance Amplitude Correction Back Wall Echo A document compiled, when required, in accordance with the Reference Code detailing special instructions on equipment use and other information that will assist the Technician during the use of a Specialised Technique. An authorized Level I, II or III RT Technician authorised by the Company in accordance with XXXX-WP-001 Rev 0 XXXX (Pty) Ltd Any UT Technique not covered in this Procedure
REFERENCES: XXXX-WP-001 REV 0 XXXX-WP-003 REV 0
Written Practice for Authorization of NDT Personnel. Written Practice for the Performance of NDT Equipment.
REQUIREMENTS: Prerequisites • All Ultrasonic Inspections shall be performed in accordance with the relevant Reference Code.
• Technique parameters shall be recorded on the Ultrasonic Report. • Additional techniques (as required) shall be compiled by an authorised RT Level II Operator, Evaluator or
•
Reviewer. Technique sheets shall be reviewed by the authorised Level II or Level III Reviewer before Ultrasonic Inspection. All required information (e.g. weld configuration, drawings, material type, etc.) regarding the component shall be supplied by the client before Ultrasonic inspection can be done.
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Personnel Requirements
• Ultrasonic Operators, Evaluators and Reviewers shall be authorised in accordance with the requirements of •
XXXX-WP-001 REV 0. Evaluation and Reviewing of results shall only be done by Authorised Level II or Level III Technicians.
Equipment Requirements
• All equipment used shall be in a safe working condition and calibrated as required in accordance with the • • • •
applicable Reference Code Section and XXXX-WP-003 Rev 0. Daily calibrations shall be done by a Qualified Technician in accordance with XXXX-WP-003 Rev 0 and the Reference Code Section. The Ultrasonic Flaw Detector to be used shall be an A-scan detector with graticule scale markings capable of operating in the frequency range of 1 to 6 MHz The probes to be used shall be of operating frequencies as required by the applicable Reference Code Section and can be either single or t win crystal type. Calibration and Reference blocks used shall meet the requirements of the Reference Code Section applicable.
Consumable Requirements Couplant: The couplant, including additives, shall not be detrimental to the material being examined. A gel or paste with a smooth consistent texture or water shall be used, unless otherwise required by the Client.
Location and Component Identification
• Each item shall be identified on a work request together with an inspection package. At each weld location a • •
physical identification should be present, i.e. Plant Location Code (PLC). In cases where the inspection package and physical identification nomenclature cannot be reconciled, NO inspection shall be performed until resolution is provided by the Client. Where temporary identification is allowed, the operator shall ensure that the type of marking will remain present for any period of re-work, should repairs be necessary. The operator shall establish a zero reference datum related to some prominent feature of the item (e.g. Top Dead Centre), which shall be detailed in the inspection report.
Precautions and Limitations • •
The component to be tested shall lend itself to sufficient accessibility as required by the applicable Reference Code Section. Any limitation shall be recorded on the Ultrasonic Test Report.
Surface Preparation When the base material or weld surface interferes with the examination, the base material or weld shall be prepared as needed to permit the examination. The maximum surface temperature when using conventional probes and couplants shall not exceed 50°C.
Timing of Inspection Ultrasonic Inspection shall be performed as per the applicable Reference Code Section.
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Examination Coverage Castings and Forgings The complete volume as specified by the Client shall be inspected in accordance with the applicable Referenced Code Section. Welds The examination coverage shall be as stipulated by the applicable Reference Code Section. Probe Manipulation Each pass of the probe shall overlap sufficiently in accordance with the applicable Reference Code Section. The speed of probe movement shall not exceed the maximum as required by the Referenced Code Section.
Inspection Sensitivity •
• • •
• •
Scanning and reference Sensitivities shall be as detailed in the applicable Reference Code Section or Clients requirements. Scanning shall be performed at a gain setting of at least twice (+6dB) the reference level. The reference sensitivity for each probe is obtained using the relevant reference block. DAC should be drawn up on a block of the same material and thickness range, using specific diameter SDH’s as detailed in the specific Reference Code Section. Transfer corrections shall be carried out between the reference blocks and the component to be tested. All other Client Requirements and/or reference Code Requirements shall be adhered to.
Recording Criteria Recording of indications shall be done in accordance with the relevant Reference Code and/or Client requirements. The detail of recording shall be sufficient for off-site analysis.
Acceptance Criteria Ultrasonic Inspection Results shall be interpreted and evaluated in accordance with the applicable Reference Code Section and/or Client Requirements, by an Authorised Level II Technician. Reporting Reporting shall be done on a standard XXXX Report Sheet, unless otherwise required by the Client. A detailed cross-sectional and plan view sketch of t he component tested shall accompany the test report.
