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Pen-chek

GUIDE to METHOD “A” (water washable) PROCESSING per ASTM E-1417-05

 

PRE-CLEAN SURFACE

Part must be clean, dry and at a temperature of 4.4° -52°C (40° - 125°F) before penetrant is applied.

Use Cee-Bee® # 210 or 300LF aqueous alkaline degreaser; immersion or spray application.

Use Pen-Chek® E-59A, R-503 or R-504 solvent cleaners for spot inspection cleaning applications.

 

 

 

 

APPLY Pen-Chek® TYPE I or TYPE II PENETRANTS (Method A)

Use spray, immersion, or wipe on application.

 

 

 

 

DWELL

Wait a minimum of 10 minutes; 20 minutes if temperature is 4.4°-10°C (40-50°F).

Reapply penetrant if dwell is over 2 hours to prevent drying out prior to removal.

 

 

 


WASH

Water temperature 10°-38°C (50°-100 °F). Water pressure < 275kPa (< 40 psi); if a hydro-air nozzle use limit

pressure to < 172kPa (<25 psi). Distance >30cm (>12 inches).

Time- only long enough to remove surface fluorescence under UV-A or color under bright visible light.

 

 

 

 


                                DRY                                     or                    APPLY AQUEOUS DEVELOPER (form c)

              Temperature <71 °C (<160 °F)                                                Immersion, flow on, or spray.

Time- only long enough to dry surface                                                          Pen-Chek  D-78B

 

 

 


       APPLY NONAQUEOUS (forms “d” or “e”) or                                                                     DRY

DRY DEVELOPER (form “a” Type I only)                                                 Temperature <71 °C (<160 °F)

Pen-Chek® D-70 or D-72A (Type I only)                                              Time- only long enough to dry surface

 

 

 

 

 


DWELL

Wait a minimum of 10 minutes before inspection. Maximum time is 1 hour for forms “d & e” (nonaqueous),

maximum 2 hours for form “c” (aqueous), and maximum 4 hours for form “a” (dry powder).

If times are exceeded, clean part and reprocess.

 

 

 

 


INSPECT

For fluorescent Type I penetrants use UV-A illumination of >1000 μw/cm2 @ 15inches (38.1 cm) in a

darkened area of <21 lux visible light (<2 foot candles).

For visible Type II penetrants use lighting of 1100 lux/m2 (100 footcandles) minimum.