Fluorescent (Type I)



Fluorescent penetrants are used to highlight surface discontinuities and through leaks under UVA illumination. Products are available in sensitivity levels, 1/2 to 4, with 4 being the highest.

All penetrants are listed on the Qualified Products List, QPL-4 of AMS-2644D. They meet the requirements of AMS-2647, ASME Boiler and Pressure Vessel Code, ASTM E-165, ASTM E-1417, BAC 5423, GE, Pratt & Whitney, Rolls-Royce and other major OEM’s, for penetrant inspection materials. All have flash points > 93.3°C (>200°F). They are low in Sulfur, Chlorine, and other Halogens, making them safe for use on Titanium and high Nickel alloys.

FBP-911, FBP-912, FBP-913 and FBP-914 series covers sensitivity levels 1-4 and was designed to be the most environmentally friendly possible. This series does not contain fats, oils, or greases (FOG’s), and is free of any volatile organic compounds (VOC’s). The constituents are considered biodegradable. This series is smooth washing, non-gel forming and will wash cleanly from rough surfaces.

FP-921, FP-922 and FP-923 series covers sensitivity levels 1-3. These materials are smooth washing without gelling. They have low viscosities, which aids in spraying and reduced drag out in immersion applications. The materials use biodegradable surfactants. They are approved by GE, Pratt & Whitney, and Rolls-Royce for non rotating turbine engine

Post Emulsifiable

Post emulsifiable penetrants and emulsifiers are qualified to the AMS-2644D specification and must be used together as a family of materials. Method B (Lipophilic) employs E-57 as the emulsifier, which is used as supplied. Method D (hydrophilic) uses E-58D, which is used diluted in water to a concentration of 17-20 % for immersion applications and < 5 % for spray. Most aerospace engine OEM’s use, or recommend the use of Method D. Met-L-Chek Company’s level 2, 3, & 4 Method D materials are approved by GE, Pratt & Whitney, and Rolls-Royce turbine engine groups. Met-L-Chek Company offers sensitivity levels 1-4, but for most applications requiring level 1 and 2 sensitivity, water washable Method A penetrants are generally used rather than the post emulsifiable. Even level 3 water washable is recommended over Methods B & D for everything except critical high stress or rotating hot section turbine engine components.

Method B Systems Method D Systems:

  • Sensitivity Level 2 – FP-93A(M) with E-57 Sensitivity Level 2 – FP-93A(M) with E-58D
  • Sensitivity Level 3 – FP-95A(M) with E-57 Sensitivity Level 3 – FP-95A(M) with E-58D
  • Sensitivity Level 4 – FP-97A(M) with E-57 Sensitivity Level 4 – FP-97A(M) with E-58D


Post Emulsifiable

NAME TYPE METHOD
class/form
SENSITIVITY
LEVEL
AMS-2644
QPL4
GENERAL DESCRIPTION
E-57 I B NA YES Lipophilic emulsifier for FP-93/95/97A(M).
E-58D I D NA YES Hydrophilic remover for FP-93/95/97A(M).
E-59 I & II C, class 2 NA YES Solvent remover for all penetrants.
E-59A I & II C, class 2 NA YES Solvent cleaner/remover for all penetrants.
R-503 I & II C, class 2 NA YES Petroleum solvent free cleaner/remover.
R-504 I & II C, class 2 NA YES Flash dry solvent cleaner/remover, phenol free.

Developers

NAME TYPE METHOD
class/form
SENSITIVITY
LEVEL
AMS-2644
QPL4
GENERAL DESCRIPTION
D-70 I & II forms d & e NA YES Nonaqueous developer, all penetrants.
D-72A I form a NA YES Dry powder developer, all Type I penetrants.
D-76B I form b NA YES Aqueous soluble developer.
D-78B I & II form c NA YES Aqueous suspendable developer.

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