Wall Thickness Measurement Procedure EPOCH-III PANAMETRIC REV1 DO NOT USE IT

7/26/2019 Wall Thickness Measurement Procedure EPOCH-III PANAMETRIC REV1 DO NOT USE IT

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DKP/INS

INSPECTION

Procedure No.

013/INS/OPS/2003

Rev. 0 Date July 03

Issued for trialWALL THICKNESS MEASUREMENT

PROCEDURE USING EPOCH-III PANAMETRIC Page 1 of 14

This document is the property of Total. It must not be reproduced or transmitted to others without written authorization from the Company

DOCUMENT CONTROL

REVISION RECORD

The table below is a record of the revision history of this document.

Amendment No. Revision No. Date Originator Remarks

1 1 11/08/03 JH Change procedure number, other minor revision & Issued for Trial

1 0 27/07/03 ER First Issue

Approbation

Prepared by: Checked by: Authorised by:

Name: Edi RatmanDKP/INS/OPS/BSP

Name: Joko HadisubrotoDKP/INS/OPS

Name: Adi PurnawanDKP/INS

Date: 27/07/03 Date: 27/07/03 Date:


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DKP/INS - INSPECTIONProcedure No.

013/INS/OPS/2003

Rev. 1 Date Aug 03

Issued for trialWALL THICKNESS MEASUREMENT PROCEDURE

USING EPOCH-III PANAMETRICPage 2 of 14


CONTENTS

DOCUMENT CONTROL __________________________________________________________ 1

CONTENTS _____________________________________________________________________ 2

REFERENCES __________________________________________________________________ 3

1. Purpose ____________________________________________________________________ 4

2. Scopes _____________________________________________________________________ 4

3. Responsibility ______________________________________________________________ 4

4. Definition___________________________________________________________________ 4

5. Procedure G: General Instructions for EPOCH-III Panametric Calibration__________5

101010106. ____________ Procedure R : Reading-out for Taking Measurement Result6107. Procedure 0 : Screen Display Prior to Calibration 106

8. Procedure M : Measurement of Wall Thickness__________________________________ 7

9. Procedure S : Single Echo - Dual Mode ________________________________________ 7

10. Procedure E : Echo to Echo - Dual Mode_______________________________________ 8

Table 1(a) : Various Range for Setting EPOCH-III PANAMETRIC___________________________ 9

Table 1(b) : Setting Calibration for Various RANGE_____________________________________ 10

Figure 3 :Metall thickness - vs- RANGE Setting Calibration EPOCH-III PANAMETRIC________ 13

10101010101010


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REFERENCES

Standard

Reference Title

ASME Sect.V Article 4 Ultrasonic Examination Method for Welds

ASME Sect.V Article 5 Ultrasonic Examination Method for Materials

Instruction Manual

Reference Title

EPOCH-III Part #910-

130

Instruction Manual

Codes

Reference Title

Not applicable

TotalFinaElf documents

Reference Title

WTU-01 UT wall thickness examination for piping system

WTU-02 UT wall thickness examination for pressure vessel


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1. Purpose

This procedure contains instructions for calibration Ultrasonic Equipment EPOCH-IIIPanametric for the purpose of measuring wall thickness of metallic material. All UTInspectors working in TOTAL area, shall use this procedure to calibrate their EPOCH-IIIPanameteric so that wall thickness measurement of metal in TOTAL area are performedin the same manner although different inspectors or equipment.

2. Scopes

This procedure is valid for all metallic material of piping, pressure vessel, structure, etc;from carbon steel or stainless steel, of the thickness from 2 mm until 200 mm. This wallthickness measurement are performed using normal probe.

3. Responsibility

Inspector - to set equipment in accordance with written instructions- to demonstrate the correct setting in front of TOTAL Supervisor Site Inspection (if SSI request)- to record read-out of equipment from standard block (eg. step wedge) before & after inspection- to be always working with the setting during the scanning and to execute inspection according to TOTAL

Specification- to put ; Gain, Range, Velocity, Gate Level in Inspection Report

Supervisor Site Inspection - to ensure that equipment setting is correct- to ensure that provision in this procedure are fulfilled during inspection.- to check and review inspection result (including result of check calibration on standard block)

Inspection Engineer - to check and review inspection result

4. Definition

Leading Edge :left leg of pulse about 10% from time base line (see Figure 1).


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5. Procedure G : General Instructions for EPOCH-III Panametric Calibration

STEP I : to calibrate PULSE in order to positioned it in correct scale; using ZERO OFFSET key and RANGE key.

STEP II: to calibrate DEPTH (Digital Read-Out) so that it indicates correct number of

Thickness; using VELOCITYkey.

Figure 1. Sketch of Screen Display EPOCH III-Panametric

1. ZERO OFFSET key ; to shift 1st

pulseto the left or to the right

2. RANGE key ; to shift 2nd

pulseto the left or to the right.

3. VELOCITY key ; to change digitalread-out of Depth.

Note : Echo-to-echo thickness reading are made by calculating the separation between theintersection #1 and intersection #2 (done by EPOCH-III Panametric software)

Calibration shall be made on coated calibration block (step wedge) when echo toecho technique will be used for thickness measurement on coated object.

5.0

1s

Pulse2

nPulse

DEPTH

Leading

Edge

Intersection of

GATE 1 with

pulse 1 Intersection of

GATE 2 with

ulse 2


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6. Procedure R : Reading-Out for Taking Measurement Result

Figure 2. Sketch of Screen Display for Reading-Out

1. Measurement result can be taken from DEPTH or Digital Read-out

2. GATE 1 level is set at 30% of Full Screen Height

3. GATE 2 level is set at 25% of Full Screen Height

4. GATE level, Range, Gain, Velocity and other setting are not allowed to be changedduring measurement, except not for taking data of measurement result.

5. GATE 2 position is allowed to be shifted to the left or to the right in order to capturerelevant pulse, GATE 1 is not.

7. Procedure 0 : Screen Display Prior to Calibration1. Gain 40 dB

2. REJection 0%

3. RANGE (as per table 1)

4. VELocity 5920

5. ZERO offset 0.000

6. ANGLE 0.000

5.0

GATE 1 1 GATE 2

DEPTH

0

20

40

60

80

100

30%25%


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7. THICKness 0.000

8. FULL WAVE RECTIFY

9. PULSER LOW

10. DAMPING 50

11. -DUAL MODE (for twin crystal)

-PULSE ECHO (for single crystal)

12. GATE (edge to edge, off the screen; Gate1Level 30%, Gate2Level 25%).

8. Procedure M : Measurement of Wall Thickness

1. Find-out Nominal Wall Thickness (NWT) of the object to be inspected.

2. Find-out whether surface where scanning to be performed is coated or not.

3. Based on NWT and Coating/Not, choose one setting calibration in table 1 (a),(b);which saved already in EPOCH-III Panametric Memory.

4. Check the chosen setting using appropriate block calibration (Step Wedge, V2,V1 etc)

5. If check result is correct, then record t1, t2, t3, Range, Gain, Velocity, Gate1Level andGate2Level.

6. If check result is not correct, re-set or recalibrate the chosen setting using step3 orstep4

7. Execute inspection on object; by keeping these :a) Scanning speed shall not exceed 152 mm/second.b) Each pass of transducer shall overlap 10% of crystal transducer diameter.

8. Coating removal : Basically, it is not allowed to remove coating from any object inTOTAL area for the purpose of ultrasonic measurement. However when coatingremoval is necessary for further detail investigation, it must be re-coated oncompletion of the job and to be recorded on the report..

9. It is not allowed to change any setting calibration during scanning, except not for datataking.

10. Capture and record data of measurement.

11. After completion of inspection, perform check calibration as step 4.

12. Record read-out of step 10; t1, t2, t3, Range, Gain, Velocity, Gate Level1 and GateLevel2.

9. Procedure S : Single Echo-Dual Mode

This procedure is chosen if surface from where scanning performed is un-coated

1. Procedure 0


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2. Use block calibration(s) having at least two different thickness (below & above ofobject thickness).

3. Couple transducer to the thinnersection4. Increase / Decrease Gain in order that leading edge of 2

ndpulse at 40% of Screen

Height

5. Use RANGE key to shift 2nd

pulse to the left or to the right so that leading edge ispositioned to correct scale of division.

Note1: it will change the RANGE from its initial setting

6. Couple transducer to the thickersection

7. Use ZERO OFFSET key to shift 1stpulse to the left or to the right so that leading

edge is positioned to correct scale of division.

8. Repeat step 3 until step 7; until both pulse appear in the correct scale of division

9. Couple transducer to thicker section; 2nd

pulse appear

10. Bring GATE1to intersect left leg of the 2nd

pulse

11. DIGITAL read-out appear on the right top of screen; use VELOCITY key to changethe number to the thickness value of the thicker section

Note2: It will return the RANGE to the initial setting.

10. Procedure E : Echo to Echo-Dual Mode

This procedure is chosen if surface from where scanning performed is coated.

1. Procedure 0

2. Use coatedblock calibration(s) having at least two different thickness (below & aboveof object thickness).

3. Couple transducer to the thinnersection

4. Increase / Decrease Gain so that 2 pulses appear and leading edge of 2nd

pulse at40% of Screen Height


pulse to the left or to the right so that leading edge is

positioned to correct scale of division.6. Use ZERO OFFSET key to shift 1

stpulse to the left or to the right so that leading edge

is positioned to correct scale of division.

Note1: step 5 and 6 will change the RANGE from its initial setting

7. Repeat step 5 and 6; until both pulses appear on the correct scale of division

8. Couple transducer to the thickersection

9. Use ZERO OFFSET key to shift 1stpulse to the left or to the right so that leading edge

is positioned to correct scale of division.


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pulse to the left or to the right so that leading edge ispositioned to correct scale of division.

11. Repeat step 9 and 10; until both pulses appear on the correct scale of division12. Bring GATE 1 to intersect left leg of 1

stpulse

13. Bring GATE 2 to intersect left leg of 2nd

pulse

14. DIGITAL read-out appear on the right top of screen; use VELOCITY key to changethe number shown to the thickness value of the section

Note2: it will return the RANGE to its initial setting.

Table 1 (a). Various RANGE for setting EPOCH-III PANAMETRIC (already tested and goodusing new Probe DHC 711, 5 MHz,0.25; Cable BCMD 316-5F)

DUAL MODE (Twin crystal transducer)

Single Echo Echo to Echo

(a) 2 5 mm

(b) 4 8 mm

(c) 5 12.5 mm

(d) 12.5 20 mm

(e) 20 100 mm

(f) 4 8 mm

(g) 8 12.5 mm

(h) 12.5 20 mm

(i) 20 25 mm

PULSE ECHO (Single crystal transducer)

Single Echo Echo to Echo

(j) 8 20 mm

(k) 20 100 mm

(l) 50 200 mm

(m) 8 20 mm

(n) 20 50 mm

(o) 50 100 mm


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Table 1 (b). Setting calibration for various RANGE in table 1(b)

Set # Min-Max(mm) Toleransi(

) Mode Teknik Setting

(a) 2 - 5 0.0 Dual Single EchoRANGE = 20.0 mmGAIN=64.5 dBGATE 1 =30%GATE 2 =--VELOCITY=6482m/s

(b) 4 8 0.0 Dual Single EchoRANGE = 20.0 mm

GAIN=61.9 dBGATE 1 =30%GATE 2 =--VELOCITY=6002m/s

(c) 5 12.5 0.0 Dual Single EchoRANGE = 50.0 mmGAIN=61.2 dBGATE 1 =30%GATE 2 =--VELOCITY=5918m/s

(d) 12.5 - 20 0.0 Dual Single EchoRANGE = 20.0 mmGAIN=61.9 dBGATE 1 =30%GATE 2 =--VELOCITY=6002m/s

(e) 20 - 100 0.0 Dual Single EchoRANGE = 100.0 mmGAIN=76.6 dBGATE 1 =30%

GATE 2 =--VELOCITY=5918m/s

(f) 4 84 - > 45 - > 5

6 - > 5.97 - > 78 - > 8

0.0 Dual Echo to EchoRANGE = 20.0 mmGAIN=61.2 dBGATE 1 =30%GATE 2 =25%VELOCITY=5827m/s


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(g) 8 12.5 0.0 Dual Echo to EchoRANGE = 50.0 mmGAIN=61.2 dB

GATE 1 =30%GATE 2 =25%VELOCITY=5918m/s

(h) 12.5 - 20 0.0 Dual Echo to EchoRANGE = 50.0 mmGAIN=68.8 dBGATE 1 =30%GATE 2 =25%VELOCITY=5918m/s

(i) 20 25 0.0 Dual Echo to EchoRANGE = 100 mmGAIN=76.6 dBGATE 1 =30%GATE 2 =25%VELOCITY=5918m/s

(j) 8 - 20 0.0 PULSEECHO

Single EchoRANGE = 50.0 mmGAIN=39.9 dBGATE 1 =30%

GATE 2 =--VELOCITY=5885m/s

(k) 20 - 100 0.0 PULSEECHO

Single EchoRANGE = 100.0 mmGAIN=58.9 dBGATE 1 =30%GATE 2 =--VELOCITY=5921m/s

(l) 50 - 200 0.0 PULSE

ECHO

Single Echo

RANGE = 200.0 mmGAIN=58.9 dBGATE 1 =30%GATE 2 =--VELOCITY=5921m/s

(m) 8 - 20 0.0 PULSEECHO

Echo to EchoRANGE = 50.0 mmGAIN=39.9 dBGATE 1 =30%


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GATE 2 =25%VELOCITY=5885m/s

(n) 20 - 50 0.0 PULSEECHO

Echo to EchoRANGE = 100.0 mmGAIN=58.9 dBGATE 1 =30%GATE 2 =25%VELOCITY=5921m/s

(0) 50 - 100 0.0 PULSEECHO

Echo to EchoRANGE = 200.0 mmGAIN=62.0 dBGATE 1 =30%

GATE 2 =25%VELOCITY=5921m/s


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Figure 3. Metal Thickness - vs- RANGE Setting Calibration for EPOCH-III PANAMETRIC

1

2

3

4

5

6

7

8

9

10

11

12

12.5

20

25

50

100

200

(a)

(b), (f)

(c)

(g)

(j), (m)

(d), (h)

(i)

(n)

(o)

(e), (k)

(l)

M

E

T

A

L

T

H

I

C

K

N

E

S

S

(mm)


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Wall Thickness Measurement Procedure EPOCH-III PANAMETRIC REV1 DO NOT USE IT

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