NDT METHODS.doc.ppt - Visual Testing VT Penetrant Testing PT Magnetic Particle Testing MPT Ultrasonic Testing UT Radiography Testing RT Eddy Current

NDT METHODS.doc.ppt - Visual Testing VT Penetrant Testing...

This preview shows page 1 - 8 out of 25 pages.

Visual Testing ( VT ) Penetrant Testing ( PT ) Magnetic Particle Testing ( MPT ) Ultrasonic Testing ( UT ) Radiography Testing ( RT ) Eddy Current Testing ( ECT ) Leak Testing ( LT ) Accoustic Emission Testing ( AET ) Thermal Infra Red ( TIR ) Neutran Radiographic Testing ( NRT )
Image of page 1
REQUIREMENTS OF NDT PERSONNEL QUALIFICATION SNT – TC – 1A - Recommended Practice for Non- destructive Testing Personnel Qualification and Certification. ASNT–CP – 189 - ASNT Standard for Qualification and Certification Of Non-destructive Testing Personnel. ASNT - American Society For Non-destructive Testing Personnel. ISNT - Indian Society For Non-destructive Testing Personnel. LEVEL OF QUALIFICATION Level I - Operator Level II - Inspector / Interpretor Level III - Authorise to write a NDT procedure and Training
Image of page 2
LIQUID PENETRANT TEST ( LPT ) History - Oil & Whiting Method For Rail Road Principle - Capillary Action of Penetrant & Blotting Action of Developer Application - To detect the discontinuities (e.g. Cracks, Seams, Laps, Lamination & Porosity etc.) pen to the surface in non porous materials. Equipment . Cleaner - Solvent or Water . Penetrant - Oil base with Dye . Developer - Chalk powder Addition of the above Linen cloth, Cotton waste or absorbent paper for cleaning purpose.
Image of page 3
BASIC STEPS INVOLVED IN LPT . SURFACE PREPARATION / PRE- CLEANING . PENETRANT APPLICATION . EXCESS PENETRANT REMOVAL . DEVELOPER APPLICATION . DEVELOPING TIME . EXAMINATION & EVALUATION . RECORDING . POST-CLEANING TECHNIQUES (Visible or Fluorescent dye) I) Water Washable II) Post Emulsification III) Solvent Removal
Image of page 4
Properties of Developer - Blotting Action - Contrast Background Properties of Penetrant - Wetting ability - Surface Tension - Capillary - High fluidity - Flash point - Temperature stability - Visibility - Volatility - Corrosive property i) Sulfur free - for In base alloy ii) Halogen free - for Austenitic SS and Ti
Image of page 5
TESTING OF PENETRANTS . Chrome Sensitivity Panel . Aluminum Comparator Block . Fluorescence Comparison Test . Visibility . Drying Test LIMITATIONS OF DPT - Can not give the indication for depth. - Poor repeatability of test. - Retest should be done with same type of penetrant only. - Not suitable for porous material. - Not applicable for hidden defects.
Image of page 6
LIQUID PENETRANT STANDARDS ASME SEC-V (ARTICLE - 22) SE-165-91 Standard Practice for Liquid Penetrant Inspection ethod. SE-1209-91 Fluorescent Penetrant Examination using water ashable process.
Image of page 7
Image of page 8

You've reached the end of your free preview.

Want to read all 25 pages?

  • Summer '19
  • John
  • Nondestructive testing, Magnetic-particle inspection

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture