Advanced Inspection by

Acoustic Emission (AE)

On-Line or Off-Line

Our AE testing method is approved by:

ASTM - American Society for Testing and Materials

ASME - American Society of Mechanical Engineers

European Committee for Standardization

International Organization for Standardization

Japanese Institute for Standardization

Japanese Society for Nondestructive Inspection

Inspection can be performed On-Line (!!)

during normal operating conditions.

Applicable for: Piping – metal, concrete, plastics – all sizes, above ground or

under ground

Heat exchangers

Storage tanks, including hazardous material

Pressure vessels, including towers and reactors

Isolated equipment

FRP (Fiberglass) equipment (vessels, pipes)

Glass lined equipment

Absolute identification of flaws and defects –

size and location :

Corrosion

Micro-cracks

Holes

Blockages

Deformation

Acoustic Emission • Acoustic Emission (AE) is a

phenomenon of sound and ultrasound wave radiation in materials that undergo deformation or fracture processes.

• Cracking, plastic deformation development, fracture and de-bonding of hard inclusions are examples of macroscopic sources of AE in metals.

• Friction and impacts are examples of mechanical AE sources.

Force

AE Sensor AE Sensor

Crack

AE waves AE waves

Friction

AE Sensor AE Sensor

AE waves

Meters

Mat

eria

l So

urc

es

Mec

han

ical

So

urc

es

Time-Difference Location Principle

AE waves AE waves

AE SensorAE Sensor

Flaw

d

D

1

2

distance from first hit sensor

D = distance between sensors

wave velocity

d D T V

d

V

AE Activity Classification a b

Amplitude (mVolt) vs. Time (μsec) Amplitude (mVolt) vs. Time (msec)

c d

Amplitude (mVolt) vs. Time (μsec) Amplitude (mVolt) vs. Time (msec)

SENTRO Approved AE Standards: ASME - American Society of Mechanical Engineers • Acoustic Emission Examination of Fiber-Reinforced Plastic Vessels, Article 11, Subsection A, Section V, Boiler and Pressure Vessel

Code • Acoustic Emission Examination of Metallic Vessels During Pressure Testing, Article 12, Subsection A, Section V, Boiler and Pressure

Vessel Code • Continuous Acoustic Emission Monitoring, Article 13 Section V ASTM - American Society for Testing and Materials • E569-97 Standard Practice for Acoustic Emission Monitoring of Structures During Controlled Stimulation • E749-96 Standard Practice for Acoustic Emission Monitoring During Continuous Welding • E1067-96 Standard Practice for Acoustic Emission Examination of Fiberglass Reinforced Plastic Resin (FRP) Tanks/Vessels • E1118-95 Standard Practice for Acoustic Emission Examination of Reinforced Thermosetting Resin Pipe (RTRP) • E1139-97 Standard Practice for Continuous Monitoring of Acoustic Emission from Metal Pressure Boundaries • E1211-97 Standard Practice for Leak Detection and Location Using Surface-Mounted Acoustic Emission Sensors • E1419-00 Standard Test Method for Examination of Seamless, Gas-Filled, Pressure Vessels Using Acoustic Emission • E1932-97 Standard Guide for Acoustic Emission Examination of Small Parts. • E2661 / E2661M - 10 Standard Practice for Acoustic Emission Examination of Plate-like and Flat Panel Composite Structures Used in

Aerospace Applications. European Committee for Standardization • DIN EN 14584, Non-Destructive Testing – Acoustic Emission – Examination of Metallic Pressure Equipment during Proof Testing;

Planar Location of AE Sources. International Organization for Standardization • ISO/DIS 16148, gas Cylinders – Refillable Seamless Steel gas Cylinders – Acoustic Emission Examination (AEE) for Periodic Inspection.

Japanese Institute for Standardization • JIS Z 2342, Methods for Acoustic Testing of Pressure Vessels during Pressure Tests and Classification of Test Results.

Japanese Society for Nondestructive Inspection • NDIS 2412-80, Acoustic Emission Testing of Spherical Pressure Vessels of High Tensile Strength Steel and Classification of Test

Results.

Acoustic Emission by Industries

AE Monitoring Hydro-Turbines in Operation

AE Monitoring of Hydrotreating Reactors

A B C

D

E

AE21

AE19

AE20

AE23

AE22AE24

AE Diagnostics and Monitoring of Operating Reactor

Indication Indication

Friction Am

pli

tude,

mV

olt

s

Time, sec

Am

pli

tude,

mV

olt

s

Time, sec

a b

Storage Tanks AE monitoring

b

Results – corrosion mapping and a detailed inspection report

FRP pressure vessel monitoring

Petroleum Piping AE inspection

23

a 24 25 26 27 28 23

23

a 24 25 26 27 28 23

7 14 21 28 35 Am

pli

tud

e

X-position, meters

FRP Pipeline AE inspection in Operation

Fiberglass Vessels AE inspection

SUMMARY:

SENTRO’s Acoustic Emission Testing can be

performed On-Line or Off-Line

Two-Step On-Line inspection:

(1)Under normal working pressure

(2)Under working pressure + 10%

On-Line or Off-Line AE testing applications:

• Piping and pipeline (metal, concrete, plastics), all sizes, above

ground or underground.

• Pressure Vessels, Water tanks, Waste Tanks, Reactors, Storage

Tanks, Towers, Boilers.

• Isolated equipment, non-metal (Concrete, FRP or other plastics)

Thank you for your time.

SENTRO TECHNOLOGIES USA, LLC

2372 Morse Ave, Suite 200, Irvine, CA 92614

WWW.SENTRO-TECH.COM

INFO@SENTRO-TECH.COM