• تهران، میدان ولیعصر (عج)، مرکز تجارت ایرانیان، طبقه 8، واحد 17

Course Duration: ۷۰ hr

EXAMINATIONS

General

Specific

Practical

Candidates must score a minimum of 70 % in each test and a minimum of 80% average for all the three tests

 

Course Outline

MODULE 1: INTRODUCTION

MODULE 2: WAVE MODES

Waves – velocity, wavelength and frequency

Wave Modes: Longitudinal and Shear waves 2

Velocity of Waves

Factors Affecting Velocity – temperature

MODULE 3: ULTRASONIC TRANSDUCER AND SOUND FIELD

Piezoelectric Crystal

Near field concept

Beam spread and sound loss

Reducing beam spread: frequency and diameter

Single and Dual transducers

Resolution in flaw detection: frequency and damping

Transducer selection: frequency and diameter

MODULE 4: UT EQUIPMENT

Pulser Receivers

Instrument Controls: gain, range, velocity, delay

Displays. A-, B- and C-scans

Selection of UT equipment for ultrasonic testing

UT Equipment demonstration

MODULE 5: THICKNESS MEASUREMENT

Thickness Measurement Concept

Probe selection: Single vs Dual

Setting the UT equipment for thickness measurement

Laboratory – Thickness measurement practicals

MODULE 6: SOUND ATTENUATION AND DECIBELS

Attenuation – loss of sound with distance

Maximum range of inspection

What are decibels (dB)

Reducing attenuation – ultrasonic frequency

Attenuation and its effects on testing of materials

Attenuation and probe selection

MODULE 7: ACOUSTIC IMPEDANCE

Reflection and transmission at interfaces

Impedance matching

MODULE 8: REFRACTION AND REFLECTION

Reflection and Refraction at interfaces

Snell’s Law

Mode Conversion to shear waves at interfaces

Introduction to Angle Beam testing of welds (covered in detail in UT Level II class)

MODULE 9: FLAW DETECTION – STRAIGHT BEAM

Flaw detection, lamination, Corrosion Mapping, Bolts

Use of Flat bottom holes for establishing reference 3

Compensating sound loss from beam spread: distance amplitude correction curves (DAC)

Inspection of forgings and castings: ASTM Standards

MODULE 10: UT TEST MODES

Pulse-echo mode

Pitch-catch mode

Thru-transmission mode

Scan Plans and weld volume coverage

MODULE 11: IMMERSION TESTING

Normal beam

Angle Beam

Focused Immersion Probes

Immersion Tanks

MODULE 12: CALIBRATION BLOCKS

IIW Blocks Type I and II

Miniature Angle Beam / Rompass Block

DSC Block

AWS Resolution Block

Step Wedge

Area Amplitude Block

Distance Amplitude Block

MODULE 13A: ANGLE BEAM INSPECTIONS – BASICS

Selection of Screen Range

Measurement of Beam Exit Point

Measurement of Refracted Angle

Range Calibration using IIW, Rompass and DSC Block

Angle Selection for Weld inspection

Surface Distance, Skip Distance, Depth, ½ vee and full V Path

Weld Inspection and plotting discontinuities like crack, lack of fusion, lack of penetration, slag, porosity in welds

MODULE 13B: ANGLE BEAM INSPECTIONS- DAC AND OTHER ISSUES

Sensitivity Calibration: Piping and non-piping calibrations

Distance Amplitude Correction (DAC) Curve

Time Corrected Gain (TCG)

Weld volume coverage and scan plan

High Temp Angle Beam Inspections

Discontinuity Length Sizing using 6 dB and 20 dB drop method 3

Worksheet: Plotting of discontinuities for butt welds

MODULE 14: ASME V, ARTICLE 4, WRITING AN ULTRASONIC PROCEDURE

ASME Section V

Essential Variables

Non-Essential Variables

MODULE 15: ASME V CODES AND STANDARDS

ASME Section V, Article 4 Weld Examination

SA 388 Heavy Steel Forging

Additional Codes Standards as per student’s requirements (please discuss this at the time of registration)

MODULE 16: ASME V CLADDING INSPECTION TECHNIQUES

Detection of disbond and cladding flaws

Techniques: One and Two · Calibration Blocks

MODULE 17: AWS D1.1 AND API RP 2X

Establishing reference level (b)

Indication rating (d) , indication level (a), attenuation factor (c)

MODULE 18: PRACTICALS

Calibration

Thickness Measurement and Scanning

Backsurface echo technique

Flaw detection

Flaw sizing

DAC curve draw

Shear Wave Testing on Pipe Samples with embedded weld defects – ID Cracks, OD Cracks, Slag, Porosity, Lack of Fusion, Lack of Penetration