2013 Asnt Fall Jentek Cui Final

8/13/2019 2013 Asnt Fall Jentek Cui Final

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Slide 1Copyright 2013 JENTEK Sensors

All Rights Reserved.

Advancements in

Imaging CorrosionUnder Insulation (CUI)

for Piping and VesselsScott Denenberg, Don Straney, Todd Dunford, Yanko Sheiretov, Shayan Haque,

Brian Manning, Jeff Kott, Andy Washabaugh, Neil Goldfine

JENTEK Sensors , Inc., 110-1 Clematis Avenue, Waltham, MA 02453-7013

Tel: 781-642-9666; Email: [email protected]

web: jenteksensors.com

ASNT Annual Conference 2013

Las Vegas, Nevada, 4-7 November 2013


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h (lift-off)

(permeability)

MWM sensor

(Thickness)

Paradigm shift in sensor design (first priority is

predictable response based on physics-based

modeling)

1. Sensors: MR-MWM-Arrays 2. Next Generation 8200 GridStation

Electronics

Technology Summary / Overview

10x signal-to-noise improvement

Very low frequencies (deep penetration)

Crack detection through up to 0.5 inches

of material

Reduced drift

3. GridStation

Software using Hyperlattices

Rapid, autonomous data analysis

Performs multivariate inverse method

(MIM) using precomputed databases

Defect Images

Performance Diagnostics

Noise Suppression

Images

Analysis

MIM

Solve Multiple Unknown Problems

Thickness

Lift-Off


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Flat Plate Demonstration

Sensor

18-channel sensor Motorized scanning

vehicle

External and internal

wall loss imaging

MR-MWM-Array

(Curved or Flat surfaces)

Flat Plate

Dimensions: 4 ft. x 4 ft.

Thickness: 0.25 in.

Flaw

Diameter: 2.25 in.

Depth: 0.150 in.

For External and Internal Corrosion


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GridStation Lattices for MR-MWM-Array wall loss imaging Used for external and internal wall loss imaging

3-Unknown Lattices

|Z| = Magnitude

Real (Re)

Imaginary

(Im)

= Phase

Re = |Z|sin()

Im = |Z|cos()

|Z| = Re2 + Im2

= arctan(Im/Re)

(Thickness)

h (lift-off)

(permeability)

MWM sensor


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Channel over defect shows defectsignature as thickness reduction

and lift-off increase

Independent Plate thickness and lift-off imaging

Thickness

Lift-Off

h (lif t-off)

(permeability)

MWM sensor

(Thickness)


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(Thickness)h (lift-off)

(permeability)

MWM sensor

Discrimination Between External and Internal Wall Loss

Thickness

Lift-Off

h (lift-off)

(permeability)

MWM sensor

(Thickness)

External Wall Loss Internal Wall Loss

Thickness

Lift-Off


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Independent Wall Thickness and Permeability

(Longitudinal Stress) Imaging

External Wall Loss Internal Wall Loss

Thick

ness

P

ermeability

(Thickness)h (lift-off)

(permeability)

MWM sensor

Need to addcorrection for sensor

construct effects

Longitudinal

permeability is

related to stress

Thickness

Magnetic

Permeability

h (lift-off)

(permeability)

MWM sensor

(Thickness)


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Decay rate determined by skin depth at

high frequency and sensor dimensions

at low frequency

Large dimensions needed for thick

coatings/insulation

Low frequencies needed to penetrate

through steel pipe wall

MWM-Array Sensor Selection

Depth of Penetration = 1/Re(n)

Stainless

Steel

Aluminum

Carbon Steel

1 inch = 25.4 mm

Skin depth: 1f

22n /2j/n2

Low Frequency Limit =

i /4

ScanDirection


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MWM-Array Sensor Selection

Depth of Penetration MRA002

MR-MWM-Array

Operating Range

External

Corrosion

Internal

Corrosion

3 Hz 320 Hz


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MWM-Array Imaging of External and Internal Corrosion

through Insulation with Weather Jacket

Problem Definit ion

10

JENTEK Sensors Video


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MWM-Array Inspection for CUI

Pre-Alpha System Performance(Wall Thickness Image)

Improved Resolution with Alpha System

(Wall Thickness Image)(in.)

(in.) (in.)

(in.)


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Wall (Thickness, Permeability)

Concrete (Thickness)Mesh

(Thickness, Permeability)

Corrosion Under Fireproofing (CUF) with Wire Mesh

VesselScanner


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Welded Nuts

Wall Thickness and Concrete Thickness

Wall Thickness Concrete Thickness


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Removing Mesh Contribution

Mesh Overlap Region

Mesh Permeability Wall Permeability

Mesh Models Still Under Development


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Other Example Applications

SCC Mapping and Depth Measurement

Post Weld Heat Treatment (PWHT) Assessment

ILI (Internal Corrosion and Stress)

Mechanical Damage Profile and Residual Stresses

SHM for Crack Growth, Corrosion, and Stress


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Representative FA24 data at 100 kHz on

EDM notch pipe sample

Notches clearly indicated as increase in

permeability

Pairs of notches show resolution capability

Permeability

Post-EDM

1.0 in.

1.0 in.

1.0 in.

0.5 in.

0.5 in.

20 22 24

Crack Imaging & Depth Measurement Capability

0.250

0.160

0.080

0.020

0.040

11.0-in. 2.0-in. 2.0-in. 11.0-in.10.0-in.

0.200

0.120

1.0-in.

1.0-in.

0.25-in. gap

0.12-in. gap

0.06-in. gap1.0-in.

1.0-in. 0.12-in. gap

0.06-in. gap

0

-90

-180

180

-90


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Crack Imaging & Depth Measurement Capability

Reasonable measurement correlation between depth and effectivepermeability change

Sensitive to notch depth over this range

160

140

120

100

80

60

40

20

0

0.250.200.150.100.050.00

EDM Notch Depth ( in.)

Schedule 40 and 80, FA24, 100 kHzlength (in.):

2.0 [single] 1.0 [single]

fit: p = 627.2 d - 15.1, R2=0.950

Single Crack

ResponseChangeatflaw

center


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For Post-Weld Heat Treatment (PWHT)

Effect of Thermal Stress Relief on Weld in

Witness Coupon, Pressure Vessel Steel

MWM-Array Residual Stress Imaging

Permeability/stress

scanning across the weld

Developing solutions

for through-thickness

imaging of stresses inwelds with crowns

Before After


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Low cost ILI Cleaning Tool

PIG-IT: Pipeline Inspection

Gage, with integrated IT

Internal and external

corrosion imaging from

inside the pipe

Oil & Gas Summary - Application Examples

In-Line Inspection

Stress Corrosion Cracking Mechanical DamageMD

Mapping of SCC clusters

Developing depth

screening capability

MPI replacement

SCC

Riser Inspection

ILICUI

Magnetic profilometry

Crack Detection in Dents

Developing residual

stress mapping

MWM-Array

Sensor

NDT without coating/

insulation removal

CUI detection through ~2in.

insulation and

weather jacket

Phased Array UT

replacement

Corrosion Under Insulation


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Under DOT and PRCI Funding with GDF Suez

4-pt static load testing of

coupon

Dynamic pipeline pressure testing

Damage Monitoring Stress Monitoring

SHM for Crack Growth, Stress (and Corrosion Monitoring)


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Summary

Internal and External Corrosion

CUI (Insulation or Insulation with Weather Jacket)

CUF (Concrete with Wire Mesh)

Other Applications

SCC Mapping and Depth Measurement

Post Weld Heat Treatment (PWHT) Assessment

ILI (Internal Corrosion and Stress)

Mechanical Damage Profiling and Residual Stress

SHM for Crack Growth, Corrosion, and Stress

Documents

2013 Asnt Fall Jentek Cui Final