Presentationon

Technique of EngineInspection

Presentationon

Technique of EngineInspection

Ferdous KabirMarketing Manager

(ASNT NDT Level-II in UT, RT, PT and ISO Level-II MT)

Saj Engineering & Trading Company

Died 1800 boilers exploded of Sultana Ship, Lack of just time just maintenance

Died 1800 boilers exploded of Sultana , Lack of just time just maintenance

Date of Inspection : 11 and 14 October, 2012Generation Capacity: 5 MWTotal Running Time: 40,564.50 Hours

Defect Occurred

Bearing Housing

Upper Hub

Bearing Housing

Lower Hub

Gudgeon Pin

Piston Crown

Cylinder Head

BOLT

BearingBearing

Dye Penetrant Testing

This method is commonly used for detect thesurface cracks or defects. Dye penetrantTesting (DPT) is one of the most widely usednondestructive Testing (NDT) methods. DPTcan be used to inspect almost any materialprovided that its surface is not extremelyrough.

This method is commonly used for detect thesurface cracks or defects. Dye penetrantTesting (DPT) is one of the most widely usednondestructive Testing (NDT) methods. DPTcan be used to inspect almost any materialprovided that its surface is not extremelyrough.

Dye Penetrant Testing Process

Three liquids areused in this method.

1. Cleaner2. Penetrant3. Developer

Three liquids areused in this method.

1. Cleaner2. Penetrant3. Developer

What is Magnetic ParticleTesting?

Detecting Crack by make magnetizecertain area

Detecting Crack by make magnetizecertain area

Which Material we can inspect by useMagnetic Particle Testing Method?

A material is considered ferromagnetic ifit can be magnetized. Materials with asignificant

• Iron• Nickel or• Cobaltcontent are generally ferromagnetic.

A material is considered ferromagnetic ifit can be magnetized. Materials with asignificant

• Iron• Nickel or• Cobaltcontent are generally ferromagnetic.

What Kinds of Defect we can detectby use Magnetic Particle TestingMethod?

Two kinds of defect we can detect by use thismethod?

SURFACE DEFECT

SUBSURFACE DEFECT

Two kinds of defect we can detect by use thismethod?

SURFACE DEFECT

SUBSURFACE DEFECT

What type of defect we can detect byuse this method?

• Welding Defect (Incomplete Fusion, SlagInclusion and Porosity, Inadequate JointPenetration, Under Cut)

• Seams• Laps• Grinding cracks• Quenching cracks• In-service damage• Fatigue• Overload cracks• Lamination

• Welding Defect (Incomplete Fusion, SlagInclusion and Porosity, Inadequate JointPenetration, Under Cut)

• Seams• Laps• Grinding cracks• Quenching cracks• In-service damage• Fatigue• Overload cracks• Lamination

Usage Procedure of MPI Test

Clean the partMagnetize the partApply the magnetic particles Inspect and mark defectsDemagnetize the partClean the part

Clean the partMagnetize the partApply the magnetic particles Inspect and mark defectsDemagnetize the partClean the part

How Does Magnetic ParticleInspection Work? (Cont.)

Finely milled iron particles coated with a dye pigment areapplied to the test specimen. These particles are attracted toleakage fields and will cluster to form an indication directly overthe discontinuity. This indication can be visually detectedunder proper lighting conditions.

A B C

A: Length of Indication 13 mm A: Length of Indication 13 mm A: Length of Indication 13 mm A: Length of Indication 13 mm

25mm 23mm 4mm

We are experience din our field,

Let us help you

Thank You

We are experience din our field,

Let us help you

Thank You