Quantcast Fluorescent Penetrant Inspection

Order this information in Print

Order this information on CD-ROM

Download in PDF Format


Click here to make tpub.com your Home Page

Page Title: Fluorescent Penetrant Inspection
Back | Up | Next

Click here for a printable version




Information Categories
.... Administration
Food and Cooking
Nuclear Fundamentals
  Educational CD-ROM's
Printed Manuals
Downloadable Books


Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
General Inspection Instructions (cont)
TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
General Repair/Assembly Instructions - TM-5-4210-220-34_24
TM 5-4210-220-34 (4) Separate  short  wavy  lines  in  the  same  general  direction  are  seen.    Flakes  are  caused  by  Improper cooling.  They are not usually seen until the metal is cut through to the flake area. (5) Fine,  sharp,  tightly  packed  lines  are  seen  (grinding  cracks).    These  are  usually  caused  by  a  glazed grinding wheel.  The wheel, instead of cutting the material, rubs and overheats the material The lines are thermal cracks similar to heat treat and hardening cracks. k. Fluorescent Penetrant Inspection This type of inspection can be carried out on any metal but is usually reserved for non-magnetic material (e.g. aluminum,  stainless  steel).    The  parts  shall  be  warm  prior  to  applying  penetrant.    The  penetrant  may  be applied by dipping, painting or spraying.  All surfaces to be examined shall be completely covered.  Penetrant time for various metals is as follows: Aluminum Alloy - no less than 20 minutes. Magnesium Alloy - no less than 20 minutes. Brass or Bronze - no less than 30 minutes. Ferrous Alloys - no less than 30 minutes. After applying penetrant, the surfaces will be cleaned with lukewarm water - less than 120 deg.  F. (Cool water may be used, but cleaning time will be longer).  Pressurized water spray may be used to shorten the washing cycle.  The following methods may be used to develop the parts. (1) Wet  Developer  Method  Parts  shall  be  completely  covered  in  developer  by  spraying  or  dipping.    Parts shall be dried and developed in a recirculating hot air drier for one half the penetration time. (2) Dry Developer Method Parts must first be dried.  The dry developer shall be spread on all surfaces by dusting or by dipping the part.  Parts shall be developed for one half the penetration time. (3) When  no  developer  is  used,  drying  and  developing  time  shall  be  at  least  equal  to  penetration  time  to allow sufficient bleeding of penetrant from defects.  If additional clarity is required during inspection dry developer may be applied by a hand powder bulb.  Following development, the part shall be inspected under black light. Any evidence of cracks is cause for rejection.  After inspection the parts shall be cleaned with dry cleaning solvent (item 10, Appendix B) and covered with rust preventive oil. m Lapping Procedures (1) Clean the part with dry cleaning solvent (item 10, Appendix B) and dry with compressed air.  Clean the lapping blocks with compressed air.  Do not use a cloth or any other material for this purpose. (2) Spread a good quality  600  grit  dry  lapping  powder  on  one  of  the  lapping  blocks.    Place  the  part  to  be lapped flat on the block and, using a figure eight motion, move it back and forth across the block.  Do not press on the part, but use just enough pressure to keep the part flat on the block It Is Important that the part be kept flat on the block at all times (3) After each four or five passes, clean the lapping powder from the part by drawing it across a clean piece of tissue placed on a flat surface and inspect the part.  DO NOT LAP EXCESSIVELY. (4) When the part is flat, wash it in dry cleaning solvent (item 10, Appendix B) and dry it with compressed air. (5) Place the dry part on the second block.  After applying lapping powder, move the part lightly across the block  in  a  figure  eight  motion  several  times  to  give  it  a  smooth  finish.    DO  NOT  LAP  EXCESSIVELY. Wash the part in dry cleaning solvent (item 10, Appendix B) again, and dry It with compressed air 2-14

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc.