acoustic emission.pdf

Non-Destructive Control and Technical Diagnosis

НАУЧНО- ПРОМЫШЛЕННЫЙ СОЮЗ

NTC «NEFTEGAZDIAGNOSTIKA»

Global DiagnosticsOil & Gaz Systems

NTC «NEFTEGAZDIAGNOSTIKA»

Solving the problem of trouble-free operation of the pipeline means early detection and repair defects of base metal and welded joints, insulating pipes.

Given the fact that the pipelines and field and main are quite extensive and extended objects, the task of finding of defects is divided into several stages: identifying defects, their precise location, to determine the degree of danger, effective and high-quality repairs.

ACOUSTIC EMISSION METHOD

After using any metods (acoustic-emission inspection, electrocorrosion, inspection pigging) of finding and lokalised of pipelines defection, as a rule, require additional procedures flaw detection control.

Unlike external defects that are easy to visual control and measurement methods, internal defects require ultrasonic or magnetic methods and as one of the most convenient for this purpose - the acoustic emission method.

NTC «NEFTEGAZDIAGNOSTIKA»

NTC «NEFTEGAZDIAGNOSTIKA»

Standard schedule of loading

AE typical signal

AE converter design

AE receiver №1 AE receiver №2

хХ2Х10

p

Х0

Crack

VV

Coordinates of the defect: Х0=[(Х2-Х1)-V*(t2-t1)]/2where V-velocity of the acoustic waves in materials,t2 - registration time of acoustic wave by sensor (AER) №2t1 - registration time of acoustic wave by sensor (AER) №1

Basics of the method AE

NTC «NEFTEGAZDIAGNOSTIKA»

pressure

- Pressure vessels - Oil storage tanks - Technological pipelines - Technological equipment of compressor stations and gas distribution - Commercial and pressure lines - Main pipelines - Hoisting equipment - Bridge steel structures - Railroad tank and parts of carriages - Heating systems pipes - Gas supply pipelines

Acoustic emission systems allow monitoringof the following objects

NTC «NEFTEGAZDIAGNOSTIKA»

Features:

- Non-destructive testing method of AE without decommissioning: the main, commercial and industrial pipelines, pressure vessels, tanks, boilers, derricks, cranes, bridges and other facilities. - Detection of the birth and development of cracks. - Search of places of corrosion, leaks, areas with increased levels of tension. - Determination of coordinates and estimation of parameters of defects. - Monitoring of different processes and assessment of technical condition of responsible large-scale structures, extended or particularly dangerous objects in real time.

NTC «NEFTEGAZDIAGNOSTIKA»

Digital acoustic - emission systems of new generation

Object of verification

Locating scheme

Technological pipeline at the refinery plant

NTC «NEFTEGAZDIAGNOSTIKA»

Locating scheme

Object of verification

Dedusting plant

NTC «NEFTEGAZDIAGNOSTIKA»

Object of verification

Location of the defect

Locating scheme

Tank, volume 10 000 m3 of fuel storage at power plant.(a defect in the wall)

NTC «NEFTEGAZDIAGNOSTIKA»

Object of verification

Locating scheme

Tank, volume 10 000 m3 of fuel storage at power plant.(a defect on the bottom of the tank)

NTC «NEFTEGAZDIAGNOSTIKA»

Locating scheme

Object of verification

Adsorption plant

NTC «NEFTEGAZDIAGNOSTIKA»

Locating scheme

Object of verification

Reforming unit at the gas processing plant

NTC «NEFTEGAZDIAGNOSTIKA»

Object of verification

Locating scheme

Tank, volume 10 000 m3 of fuel storage at power plant.(a defect on the bottom of the tank)

NTC «NEFTEGAZDIAGNOSTIKA»

Object of verification

Locating scheme

Pressure vessel

NTC «NEFTEGAZDIAGNOSTIKA»

NTC «NEFTEGAZDIAGNOSTIKA»

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