3- Automated Ultrasonic

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3. Technical condition assessment

of the welds of various types,using modern automatic devices

for ultrasonic control

Vladimir F. Chaburkin, Doctor of Science



AUTOMATED NON-DESTRUCTIVE ULTRASONIC CONTROL

Service Description Characteristics of Objects PresentedDocumentation

Automated ultrasonictesting of welded joints of equipment and pipelines

made of perlite andaustenitic steels.

Test reports.Classification of the welded

joint flaws.

Examination of defectiveequipment parts andpipelines and establishing

actual defect parameters.

Experts’ findings on the type,location, size, and position of the defect.

Evaluation of dander levelin defective equipmentcomponents andassessment of the

equipment and pipelinework-life resource.

Experts’ findings on theadmissibility of the currentloads (based on the StrengthReports).

Monitoring of theequipment and pipeline'stechnical conditions.

The material thickness: inexcess of 5 mm.

Pipeline diameters: 100 mmand more – up to the flatness.Types of welded joints:circular, longitudinal.

Experts’ findings on how thedefect parameters change inthe process of operation.



THE ALGORITHM FOR CONTROL AND EVALUATION OFWELD JOINT CONDITIONS

Regular ultrasonic control at ahigher sensitivity level(+6 ÷ 12db)

Manual or Automatedcontrol control

Unfit accordingto the current

standards

Unfit accordingto the current

standards

Expert data analysis

Expert control of

defective zones Strength analysis andresource evaluation

Periodicmonitoring

Fit during acertain time

period Unfit

TTTOOO BBBEEE R R R EEEPPP A A AIIIR R R EEEDDD

TTTOOO OOOPPPEEER R R A A ATTTIIIOOONNN



THE RESOLUTION OF THE HOLOGRAPHIC ANDTRADITIONAL CONTROL

Thickness of the metal, mm

R e s o l u t i o n , m m Holographic control

Traditional control



ULTRASONIC CONTROLOF A GAS PUMP STATION PIPELINE

An image of a pipe jointdiscontinuity, ∅ 219 х13 mm

A microsection of a pipe joint,∅ 219 х13 mm



GENERAL VIEW OF THE ULTRASONIC CONTROL SYSTEM



THE SCANNING DEVICES

The scanner (tracking)for pipelines with thediameter more then

300 mm

The scanner (chain) forpipelines with the

diameter up to 300 mm

O O C C CO O O O S



EXAMINATION OF TECHNICAL CONDITION OF OIL PIPELINES

Classification of flaws detected by complexultrasonic testing of oil pipeline circular welds.

Distribution of dimensions of flaws detected bycomplex ultrasonic testing of oil pipeline

circular welds.

66 %Length < 25mmHeight < 2 mm

17 %Length > 25mmHeight < 2 mm

8 %Length < 25mmHeight > 2 mm

9 %Length > 25mmHeight > 2 mm

73 %Lack of penetration

10 %Defect typeunidentified

3 %Point

defects

0,7 %Three-

dimensionaltype

6 %Two-

dimensionaltype



ULTRASONIC CONTROL OF WELD JOINTS AT GAS PUMP STATIONS

A scanner inspecting pipelines200 to 1400 mm in diameter.

The control operator’s work place.



THE VOLUME OF THE COMPLEX ULTRASONIC TESTING OFTHE WELDED JOINTS OF PIPELINES OF THE NUCLEAR

POWER PLANT UNITS UNDER CONSTRUCTION

The typicalsize of

pipeline

The weldsfor expert

testing

The welds,subjected to the

periodicalmonitoring

The welds,repaired according

to the results of the strength

analysis ∅ 300 763 374 85

∅ 800 385 105 18

∅ 850 66 - -

Total 1214 479 103



THE SCOPE OF COMPREHENSIVE (CONVENTIONAL ANDEXPERT) ULTRASONIC CONTROL OF WELD JOINTS AT

NUCLEAR POWER PLANTS UNDER CONSTRUCTION

Pipelinestandard size

Totalnumberof weld joints

Defectivewelds

detectedby USC

AdmissibleDisccontinuitywelds detected

by USC

Welds forexpert controland strength

analysis

Sent to berepaired

∅ 850 х 65 40 0 14 14 0The

firstcircuit

∅ 1200 х 75 8 5 1 8 0

∅ 630 х 25 198 17 42 80 1

∅ 530 х 75 214 2 12 14 0

∅ 426 х 28 216 73 17 94 1

∅ 325 х 19 157 28 14 42 0

∅ 273 х 16 80 20 4 24 0

The

secondcircuit∅ 219 х 13 43 12 5 17 1

Total 956 157 109 293 3

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3- Automated Ultrasonic