RTD Incotest 5 Top Applications

RTD-INCOTEST®

Herman J. Quakkelsteijn, February 2006

RTD-INCOTEST the alternative cost saver

Contents

Introduction

Principle RTD-INCOTEST

5 top applications

Conclusion


RTD-INCOTEST®

INsulated COmponent TEST


Principle of operation

Pipe wall

Insulation

Sheeting

Magnetic Field

Eddy Currents

Coil


Measurement principle

Time

Am

plitu

de


MeasurementFootprint and detection areaFootprint and detection area

A v e r a g e T h ic k n e s s / W a ll T h in n in g

D

D E F E C TL O C A T I O N

S E N S O R

L I F T -O F F


Average vs. MinimumGeneral wall loss:

Irregular wall loss (e.g. corrosion under insulation):

Very localised corrosion (like pitting):Average wall thickness

Minimum wall thicknessfootprintfootprint

Minimum wall thickness

Average wall thickness

footprintfootprint


Minimum wall thicknessfootprint


Minimum wall thicknessfootprint






Data display

AWT%

Inspection Grid

Signal QualityControl

Eddy CurrentDecay


Data presentation

TUYAUTERIE ANG 35-4

A B C D E F G H I J K L1 90 86 91 P P 81 89 91 89 91 81 842 93 85 P P P 80 88 87 87 83 82 843 97 86 88 P P 82 82 88 86 87 86 824 100 87 88 90 88 81 81 86 85 85 85 875 98 90 89 89 87 79 81 85 82 85 91 886 96 87 85 89 79 79 80 81 81 91 84 947 94 86 86 95 81 80 84 105 91 94 91 968 97 92 88 90 92 88 84 99 97 92 85 1019 95 99 92 97 101 94 88 99 99 95 91 10110 100 100 94 92 102 95 96 97 96 92 92 10511 99 99 91 94 106 98 96 99 96 94 93 10512 97 99 93 95 102 97 94 98 99 92 91 10513 103 94 96 96 97 92 96 97 95 93 92 10314 98 91 96 100 96 100 99 93 97 91 93 10515 101 95 92 95 96 99 98 95 91 93 92 10316 101 93 95 97 90 100 100 93 92 94 96 10117 102 91 93 91 95 95 99 95 88 94 101 10118 102 91 94 96 92 94 101 92 83 100 103 10119 98 91 91 97 87 86 98 90 84 96 104 10320 102 86 87 90 87 82 94 94 81 87 103 10121 93 86 89 89 83 78 88 89 79 86 92 9222 89 85 82 85 88 82 88 85 82 85 87 8923 90 84 80 82 85 85 81 85 82 88 85 8824 90 81 86 88 88 90 87 89 84 84 85 8925 98 89 94 99 96 99 95 95 86 88 95 9926 94 90 95 97 98 97 93 92 88 86 95 9927 95 93 97 100 95 95 88 90 86 89 95 9928 97 95 98 99 94 91 91 89 86 92 98 10029 96 98 95 92 92 94 92 90 90 93 95 9930 94 93 94 95 94 95 94 90 90 94 99 9931 93 91 93 93 94 96 96 94 90 96 95 9832 91 92 92 90 92 91 95 98 93 91 95 9633 94 96 91 93 88 92 93 94 91 89 94 9534 94 91 91 91 93 90 93 91 89 89 90 9235 92 90 91 92 91 88 91 88 89 88 87 92

GENERATRICES

Raw data 3D presentation


Applications

Screening tool

Detection of reduced WT areas

Measurement of the average remaining wall thickness, within the interrogated area(footprint).


Specifications

Carbon steel (ferromagnetic)WT 6-65 mmInsulation thickness <200 mmAluminium or SS sheetingTemp. -150°C to 500°C Minimum pipe diameter 50 mm

Note: certain combinations may limit application range


Contents

Introduction

Pulsed Eddy Current technique

RTD-INCOTEST tool

Top 5 applications

Conclusion


Top 5 applications

Spherical tank legsRisers Port structures (steel piling)Distillation columnsPiping in power plants (FAC)

Note: cost savings in next slides based on European price level


Sphere legs


Sphere legs


Sphere legs

Internal or externalcorrosionWater ingress due todamaged fire proofingReadings along, aroundthe leg


Sphere legs


Cost savings

Conventional:ScaffoldingConcrete removalSand blastingUTApply concreteDown time 2 weeks

Costs: 100k€ to 300k€per tank

RTD-INCOTESTRope access or extension toolOn streamDirectly on concrete2-4 days inspection in total

Costs: approx 20k€ per tank


Riser & construction pipes


Riser pipes

Situation:Corrosion in splash zoneBoth internal or externalCoating, monel or thick layers of painting


Cost savings

ConventionalCleaning of marine growthRemove protectionUTRope accessConserve surfaceThrough monelimpossible

Costs: approx 15 k€per object

RTD-INCOTESTThrough monel or marine growthAccess by extension toolUp to 500 measurements per day

Costs: approx 3 k€per day


Port structures

Jetties, quays, dikes, locks etc.


Port structures

Steel sheet piling


Port structures

Jetty supports


Cost savings

ConventionalCreate dry areaRemoval of marine growthSand blastingUTDown time (no docking of ships)

Costs: 20 k€ per 100 meter

RTD-INCOTESTDirectly on surfaceAccess by diver or small boatNo down time

Costs: 3 k€ for up to 1000 measurements per day


Distillation columns


Cost savings*

ConventionalDown timescaffoldingInsulation removalUTApply insulation

Costs: 250 k€

RTD-INCOTESTAccess via ladder, platform or ropesDirectly on insulation

Costs: 10 k€

*NOTE: RTD-INCOTEST measurement is part of integral inspection approach, never stand alone.


Piping in power plants (FAC)

Surry NPP, 1986

Mihama NPP, 2004


Piping in power plants (FAC)

ConventionalDown time (outage)Removal of insulation (asbestos ?)UTPossible bottle neck in outage if serious corrosion is present

Costs: 4 k€ day

RTD-INCOTESTOn streamDirectly on insulationCan be used in pre selective approachUp to 1000 measurements per day

Costs: 3 k€ day


Summary

Corrosion detectionScreening toolNo direct surface contact neededNo surface preparation neededOn-streamSaves time, costs and risk


More information ?

Röntgen Technische Dienst bvRotterdam, the Netherlands

e-mail : [email protected] : +31 10 208 8 291fax : +31 10 415 8 022web : www.rtd-group.com

Documents

RTD Incotest 5 Top Applications