Nondestructive Examination - The Practical Knowledge of Steam Boiler

Nondestructive Examination (NDE)

What is non-destructive examination (NDE) or non-destructive test (NDT)?

How shall NDT personnel be qualified?

When must all NDT examinations be performed to written procedures?

Who is responsible for providing the NDT procedures and personnel qualification certifications required?

What are the destructive and non-destructive tests carried out on the metal used for the various parts of the boiler?

Who performs NDT inspections?

Who perform NDT examinations?

What NDT methods are within the scope of Section V?

What is acoustic emission (AE) examination?

What is eddy current examination?

What are the NDT’s that you are familiar with? What types of defect can be detected by using NDT?

Describe weld defects and the corresponding suitable NDT

Outline the type of NDT and DT that shall be used to assess the condition of the weld and tube.

Describe three (3) destructive mechanical tests (DT) used to determine the integrity of the welded joints. What are the limitations of each of the test?

What is “hardness test”?

What is impact test?

Describe briefly the Brinnell hardness testing, which may be used to measure the hardness property of metal and weldment.

Describe briefly the Vickers hardness testing, which may be used to measure the hardness property of metal and weldment.

Describe briefly the Rockwell hardness testing, which may be used to measure the hardness property of metal and weldment.

What materials are commonly inspected by using dye penetrant test? ^{NEW 2ND EDITION}

A crack was found on a boiler furnace circumferential seam. Further examination was agreed to determine the magnitude (size and depth) of the crack. Magnetic particle inspection and ultrasonic thickness inspection were selected. Explain how both methods can determine the size of the crack. ^{NEW 2ND EDITION}

Name five characteristic ideal for a developer used in dye penetrant testing. ^{NEW 2ND EDITION}

Give four (4) main applications of ultrasonic testing. ^{NEW 2ND EDITION}

When demagnetization is usually required in Magnetic Particle Examination? ^{NEW 2ND EDITION}

With the aid of diagrams, describe Double Wall Double Image technique used in Radiographic Testing.^{NEW 2ND EDITION}

Image Quality Indicators (IQI) or penetrameters are used to measure the quality of radiograph in Radiographic Testing. List two types of IQI. ^{NEW 2ND EDITION}

Give three factors governing the quality of a radiograph.^{NEW 2ND EDITION}

What is the limitation of penetrant testing (PT)?

How does liquid penetrant work so that it can be used for examination for discontinuities?

What is type A and type B liquid-penetrant inspection?

Can you flush the surface with solvent prior to the application of developer?

What are the recommended dwell times for PT on steel for penetrant and developer?

What 6 (six) techniques of PT are used per Section V?

What are typical discontinuities found by liquid penetrant testing?

What are penetrant materials?

What is the metal temperature range for liquid penetration inspection (PT)?

When shall final interpretation be made in PT?

Explain in detail how would you carry out dye penetrant test (PT).

How surface may be prepared for PT?

How may penetrant be applied?

How is film density of radiography measured?

What film must be used for Section V radiography?

What types of IQI (Image Quality Indicator) may be used?

When shall double-wall radiography be used?

What is the minimum thickness of steel to be radiographed with IR-192?

Explain in detail how would you carry out magnetic particle inspection (MPI).

What method of MPI is required per the Code?

What are the limitations of Magnetic Particle Inspection (MPI)?

What are the safety precautions for radiographic testing?

What surface preparation is required for radiography?

What are the limitations of radiography?

What does the magnetic particle examination detect?

What is the lifting power of an AC yoke? Of a DC yoke?

What 5 (five) techniques may be used in magnetic particle examination?

How shall magnetic flux be produced in the part?

What is the maximum temperature for dry powder MT?

What is the maximum temperature for wet method MT?

What is ultrasonic testing?

What are the limitations of ultrasonic testing?

Give three (3) characteristics of good couplant gel used in ultrasonic testing.

What does the term CRT means as applied to ultrasonic testing? Explain.

What is ultrasonic thickness testing (UTT)? When should you use UTT?

What is a hydrostatic test (HT)? Relate to the ASME Codes.

Outline the procedures to carry out hydrostatic test

What are the procedures to operate a manual hydrostatic pump?

Can you use hot feedwater for hydrostatic test?

Why cannot you use steam for hydrostatic test, i.e. bringing up to hydraulic test pressure by raising steam?

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