FIELD OF APPLICATION Equipments / Parts Piping

Standards ASTM, E 797-10

Materials Carbon Steel Stainless Steel

Thicknesses Min.: 4 mm ( 0.160‘’ ) Max.: 51 mm ( 2.0‘’ )

Diameters Min.: 76 mm ( 3.0‘’ ) Max.: 0,76 m ( 30.0 ‘’ ) Temperatures Min.: - 20°C ( -4 °F ) Max.: 115°C ( 240 °F ) Surface Conditions Paint: Thickness max: 0.040’’ Uniform and well gripped Corrosion: Light surface corrosion could be acceptable

Indications of Interest Corrosion Local corrosion, pitting Erosion

ADVANTAGES DISADVANTAGES

▪ Data are saved and available for com-parison with future inspection.

▪ Excellent probability of detection.

▪ Screenshots recording.

▪ Possibility to do an Excel file with all the data of the inspection.

▪ Sensible to curved surfaces.

▪ Surface must be clean.

▪ Require a direct contact with the part.

▪ Interpretation must be done after inspection.

Phased-array ultrasonic testing uses multi-elements probe (64 elements). From a probe position, we can visualize a cutting view of the thickness of the part, who is made with near of 50 ultrasonic beams at near each millimeter, for a total width of about 50mm (2’’). By using a scanner to hold the probe in place and keep tracking of the probe, it is possible to draw a map of the thickness of the pipe. All the data over a length of 10.75’’ and all around the circumference is recorded in a file. Then we can use a software to analyse this information and produce A-Scan, B-Scan or C-Scan with desired parameters. An Excel file, with all the inspection data at each 1 to 2 millimeters and the average values at each areas of 1/4, 1/2 or 1 square inches could be provided as an option. These values could be compared with previous inspection data to establish corrosion percentage with precision. The incertitude for this kind of thickness measurement is approximately 0.005’’.

BRIEF DESCRIPTION :

Example of horizontal pipe with thickness loss in the bottom and a grinded area from the interior. Screenshot below show a E-Scan, B-Scan, A-Scan and C-Scan of described pipe.

REPRESENTATION(S)

Version 2, 2012-04-03

Technique : Ultrasonic Testing - Encoded Phased-Array , longitudinal waves

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TORNGATS Technical Services inc. 5635, rue Rideau

Quebec city, QC, Canada, G2E 5V9

Tél. : 418 781-2579 Fax : 418 907-8420 www.torngats.ca

PIPING THICKNESS

MAPPING

PIPING THICKNESS

MAPPING Technique : Ultrasonic Testing - Encoded Phased-Array, longitudinal waves

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LIMITS OF DETECTION MEASUREMENTS ACCURACY

▪ Minimum thickness: 2,5 mm (0.100’’)

▪ Areas near obstacles on scanning surface, like weld build-up are not accessible.

Axially : 10 mm (0.375’’) Circumferentially : 16 mm (0.625’’)

▪ Corrosion or paint could affect data quality.

▪ Position of indications on the surface: ± 6 mm (0.250’’)

▪ Depth: ± 0.1 mm (0.005’’)

▪ Pitting Dimensions : ± 1 mm (0.040’’)

▪ The technician must have a safe access to put the transducer in direct contact with the surface to be inspected.

▪ A free space from the inspection surface of approximately 6’’ (150 mm) from the exterior diameter is necessary.

▪ The instrument is powered with batteries, there is no need of electric current.

▪ Couplant will be used. Water is not required.

OTHER COMMENTS FOR SITE INSPECTION

▪ Except access to the inspection location, it takes about 30 minutes for preparation and calibration.

▪ Once on site, it is possible to cover an area of 10.75’’ in length in 30 to 45min.

▪ Data analysis of 10 areas of 10.75’’ in length should take approximately between1 or 2 hours.

▪ Finally, consider approximately 1 hour per day of work for reporting.

▪ Add approximately 1 extra hour by day of inspection for an Excel file if desired.

These estimations should be used only as guidelines and can’t be a commitment, since every job has its own particularities. For a fixed price, please ask for a quotation.

ESTIMATED EFFICIENCY

REPORTING

▪ Inspection reports contain :

- Technical details of the inspection.

- Details of inspected area and pictures if possible.

- Pictures with thickness for each area. Indications depth will be shown using color code (C-Scan).

- Minimum thickness for each area.

- DVD with all the inspection data, reports, pictures and free viewer version of the analysis software, optional.

- Optional : Excel file with all the thickness data at each position, and the average of thickness for area of 1/4, 1/2 or 1 square inches.

Procedure : Certification : PR-PAE - Thickness_v0 SNT-TC PA1

AS - Piping Thickness Mapping PAE

This document only aims to express the main frame of this application and does not necessarily represent the absolute limitations of this technique. For any needs outside this scope, simply contact us to validate feasibility.