(1) Simultaneous Acquisition and Analysis of Flaws by Phased Array (Sector Scan or Linear Scan) and Dual-TOFD with High Speed Scanning(2) Dual TOFD means to do 2 kinds of Set-up Condition at Same Time.(3) Detection and Accurate Height Sizing by Phased Array for Fatigue Cracks in the Clad Restoration Weld and its Heat Affected Zone(4) Monitoring by TOFD for the Flaw Propagation at the Base Metal Weld and its Heat Affected Zone due to Coke Drum Cyclic Operation

S.H.I. EXAMINATION & INSPECTION, LTD.

In-Service Inspection

B-Scan

C-Scan

C-Scan

B-Scan

Pre-Service Inspection

Dual PA-Sector Scan PA-Linear Scan + TOFD

TOFD B-Scan

Characteristic of Our Automatic UT System

(Angle Beam Technique) (Straight Beam Technique)

In--Service Inspection

(1) Dual TOFD System means to do two (2) kinds of TOFD Set-up Condition simultaneously.(2) TOFD-1 has a Responsibility mainly detect the Surface Flawnear the Scanning Surfaces.(3) The Region to detect the Flaws for Thickness Direction is improved, and Inspection Time can be reduced. (4) Flaw Evaluation in accordance with ASME Code Case 2235-4(1) Software Control of Beam Angle, Focusing Distance, and Number of Active Element simultaneouslyFocusing to Overlay WeldMaximum 32 Elements can be active simultaneously.(2) High Speed Scans, Parallel Scan with the Weld only as same as TOFD(3) Both Linear Scan and Sector Scan Display A-Scope, Plan View (C-Scan) and Sectional View (B, D-Scan) (4) Water is used as Couplant as same as TOFD.

Dual TOFD (Time Of Flight Diffraction)

PA Linear Scan Dual PA Sector Scan

AUT Inspection Report

All AUT Displays and the Summary Table for Detected Flaws will be submitted by CD-R.

External Insulation to be removed

S.H.I. EXAMINATION & INSPECTION, LTD.

Phased Array (PA) Electrical Scan

(1) 2 kinds of PA Sector Scan is conducted simultaneously by 2 Phased Array Probes placed equally for the Centerline of Weld. (2) Accurate Height Sizing of Each Detected Flaw can be verified by the applicable VC-Sector Display (by applying to Tip-Diffraction Method).(3) 3-Dimensional Merged Display (B, C, D-Scan) of Dual PA Sector Scan can be obtained for Each Scanning Unit as same as PA Linear Scan.

Characteristic of Dual PA Sector Scan

C-Scan

B-Scan

Test Piece Overlaid by INCONEL VC-Sector Display

Merged Display of Phased Array Dual Sector Scan

Detection and Sizing for SCC of Pipe ConfigurationScanning can be available to 4 NPS Pipe and Larger Pipe.

Fatigue Crack Height Sizing in 24 mm Thk Stainless Steel

Crack Tip Crack Tip

PA Sector Scan TOFD (Time Of Flight Diffraction)

Crack Open

Location ofPA Display

PT for Crack

CrackCrack

TOFD DisplayVC-Sector Display

Scanning for Nozzle Neck Axial ScanningCircumferential Scanning

CrackHeight

Crack Open

Magnifying Photo of Crack at the Edge

S.H.I. EXAMINATION & INSPECTION, LTD.

(1) SCC Height Sizing Values is verified by both Phased Array and TOFD.(2) In Case of Butt Weld Joint of Stainless Steel except Pipe Configuration, Dual PA Sector Scan is conducted simultaneously by 2 Phased Array Probes placed equally for the Centerline of Weld. (3) 3-Dimensional Merged Display (B, C, D-Scan) of Dual PA Sector Scan can be obtained for Each Scanning Unit.

SCC Detection and Sizing in Stainless Steel

C-Scan

B-Scan

Stainless Steel Butt Weld Test Piece VC-Sector Display

Merged Display of Dual Sector Scan

(1.5 Skip Method)

Temp: 200 C

(1) Repeat TOFD Inspection at a Weld Surface and/or Base Metal during Operation at High Temperature up to 400 Degree C. (2) TOFD Inspection can take place long before Shutdown to optimize the Planning of the Shutdown.(3) Dual TOFD Inspection (2 kinds of Set-up Condition) is conducted simultaneously to improve the Reliability of Flaw Detection.

S.H.I. EXAMINATION & INSPECTION, LTD.

Characteristic of our High Temp TOFD Inspection

Temp: 320 C Temp: 400 C