Section 6: Selected Applications & Techniques

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Pulse-echo thickness gages with a digital readout are widely used for thickness measurement. Pulse-echo testing can measure such great thickness that it can determine the length of a steel reinforcing rod in a concrete structure, provided one end of the rod is accessible for contact by the search unit. Although pulse-echo testing is capable of measuring considerable thicknesses, near-field effects make the use of pulse-echo testing ineffective on very thin materials.
6.9.3 Position measurements Position measurements of solid parts or liquid materials in closed metallic cavities are usually made with pulse echo type equipment. One technique is to look for changes in back reflection intensity as the position of the search unit is changed. In one variation of this technique, the oil level in differential housings was checked to see if the automated equipment used to put the oil in the housing on an-assembly line had malfunctioned. The test developed for this application utilized a dual-gated pulse-echo system that employed a 1.6- MHz immersion-type search unit with a thin, oil filled rubber gland over its face. The search unit was automatically placed against the outside surface of the housing just below the proper oil level, as shown in Fig. 60(a).
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Section 6: Selected Applications &
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6.11: Casting 6.12: Inspection of b
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6.1.1 Casting Defects & Discontinui
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Casting Defects & Discontinuities-
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Casting Defects & Discontinuities
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Casting Defects & Discontinuities
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Processing Defects & Discontinuitie
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6.1.3 Welding Defects & Discontinui
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Welding Defects & Discontinuities
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Welding Defects & Discontinuities-
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Service Induced Defects & Discontin
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Figure 4-24 - In a carbon steel sam
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Figure 4-36 - Weld detail used to j
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Figure 4-38 - Failure of DMW joinin
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Figure 4-58 - Cross-sectional view
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Figure 5-2 - Hot Lean Amine Corrosi
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Figure 5-46 - Overhead interstage k
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Figure 5-48 - Metallographic sample
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6.2: Rail Inspection
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The need for a better inspection me
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Transverse Fissure
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One of the methods used to inspect
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Techniques: Examples of axles with
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6.3: Weldments (Welded Joints)
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UT of Weldments (Welded Joints) F s
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Flaw Detection- Depth Determination
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T = Plate Thickness ϴ = Shear wave
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Flaw Detection- Triangulations of r
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To determine the proper scanning ar
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Expert at works
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Typically scanning patterns
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Weld Scanning
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Weld Scanning
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Echo Dynamic- Position of Defects
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Plate Weld Scanning
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Plate Weld Scanning
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Practice Makes Perfect 52. One of t
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6.4: Pipe & Tube
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Pipe & Tube
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Pipe Scanning
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Pipe Scanning 48.59 o max 30 o max
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Pipe Scanning
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Pipe Scanning- thickness/OD ratio W
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Pipe Scanning- Contact Methods
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Q: Calculate the maximum shear wave
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Q35: During immersion testing of pi
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6.5: Echo Dynamic
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6.5.1 Basic echodynamic pattern of
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C.1 Pattern 1 Point-like reflector
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C.2 Pattern 2 Extended (elongated)
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C.3 Pattern 3a Extended (elongated)
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C.3 Pattern 3b Oblique incidence, t
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C.3 Pattern 3b Oblique incidence, t
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C.4 Pattern 4 Multiple reflector re
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Echodynamic- Change of echo height
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Break Time
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Echo Dynamic of Discontinuity- Flaw
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Echo Dynamic of Discontinuity- Impr
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Echo Dynamic of Discontinuity- Refl
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Echo Dynamic of Discontinuity- Tand
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Echo Dynamic of Discontinuity- Tand
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Echo Dynamic- Root Concavity
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Echo Dynamic
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Echo Dynamic
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Echo Dynamic- Broad indication with
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Echo Dynamic
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Echo Dynamic The echo response from
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Echo Dynamic Typical Echo Dynamic P
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Echo Dynamic Typical Echo Dynamic P
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Q183. In immersion testing, irrelev
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Q46. Which best describes a typical
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6.6: Technique Sheets
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Hanger Pin Testing using Shear Wave
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Physical Dimension
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Physical Dimension
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Reporting: Scanning Report - Top of
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Mock-Up
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Mock-Up
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Mock-Up
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Hanger Pin Testing using Shear Wave
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Pitch and Catch Methods- Set-up
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6.7: Material Properties- Elastic M
Page 213 and 214: 6.7.2 The attenuation method The at
Page 215 and 216: 6.7.3 Velocity Measurements Velocit
Page 217 and 218: Elastic Modulus Measurement - Young
Page 219 and 220: These basic material properties, wh
Page 221 and 222: Equipment: The velocity measurement
Page 223 and 224: Testing Procedure: Equipment Used.
Page 225 and 226: Velocity & Equations Poisson Ratio
Page 227 and 228: 6.8: High Temperature Ultrasonic Te
Page 229 and 230: 1.0 Background: Although most ultra
Page 231 and 232: Temperature Limitation: Conventiona
Page 237 and 238: 敦煌大漠美食 -50 度火
Page 239 and 240: 2.0 Methods used for H.Temperature
Page 241 and 242: For precision thickness gauging app
Page 243 and 244: (1b) Flaw detection As in high temp
Page 245 and 246: 2.2 High Temperature Couplants Most
Page 247 and 248: Keyword: Note that normal incidence
Page 249 and 250: As a general rule, if the outer cas
Page 251 and 252: 2.4 Equipment Functions Freeze Func
Page 253 and 254: Keyword: ■ ■ Velocity change of
Page 255 and 256: 3.3 Increased Attenuation: Sound at
Page 257 and 258: 3.4 Angular Variation in Wedges: Wi
Page 259: 6.9: Dimension-Measurement Applicat
Page 263: 6.9.2 Thickness measurements are ma
Page 267 and 268: Fig. 60 Method of determining corre
Page 269 and 270: Fig. 61 Setup for determining the p
Page 271 and 272: 6.10: In-Service Inspection
Page 273 and 274: In-Service Inspection- Testing for
Page 275 and 276: In-Service Inspection- (a) Crack te
Page 277 and 278: In-Service Inspection- (a) Testing
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Page 281 and 282: Casting- Typical casting defects an
Page 283 and 284: Casting- Detection of shrinkage cav
Page 285 and 286: Inspection of Bonded Joints If the
Page 287 and 288: 6.13: Corrosion Monitoring
Page 289 and 290: Despite these drawbacks, ultrasonic
Page 291 and 292: Crack Monitoring Laboratory and in-
Page 293 and 294: The use of pulse-echo techniques fo
Page 295 and 296: 6.15: Stress Measurements
Page 297 and 298: The real limitation of this techniq
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Page 309 and 310: TOFD offers rapid weld inspection w
Page 311 and 312: Due to the low amplitude of the dif
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TOFD
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TOFD has been used for some time fo
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Figure 5-2 - Hot Lean Amine Corrosi
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For these types of weld inspections
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Scan of weld with cursor positioned
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Measurement of good area shows thic
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6.11.3.3TOFD for Corrosion Measurem
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TOFD for Weld- TOFD Parallel Scanni
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■ Perpendicular Scanning Scanning
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Typical “Perpendicular” Weld Sc
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■ Benefit of TOFD Parallel Scanni
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The Experts at work.
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Break Time mms://a588.l3944020587.c
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Break Time
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Section 6: Selected Applications & Techniques

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