Visible (Type II)



Visible inspection penetrants are used primarily for field applications where darkening the inspection area and the use of a black light (UV-A) is impractical, such as maintenance weld repair and safety checks. They are used to locate repair work areas on large rough castings and for through leak testing of heat exchangers and tanks where penetrant is applied to one side and developer to the other. Discontinuities in the range of 50μ are routinely detectable and under the right conditions even smaller discontinuities may be highlighted. Special high temperature visible penetrant materials are available which permit inspection of surfaces at temperatures up to 177deg. C (350deg. F). The majority of the applications use the solvent wipe off (Method C) technique of processing because most applications are spot or localized inspections. Production or full part inspection may be performed with visible penetrants using Methods A, B or D.

NAME TYPE METHOD
class/form
SENSITIVITY
LEVEL
AMS-2644
QPL4
GENERAL DESCRIPTION
VP-30 II A & C NA YES Welding, nuclear and general metal work.
VBP-300 II A & C NA YES Oil & solvent free, general metal working

Post Emulsifiable

NAME TYPE METHOD
class/form
SENSITIVITY
LEVEL
AMS-2644
QPL4
GENERAL DESCRIPTION
VP-31A II B & C NA YES Welding, nuclear and general metal work.

Cleaners & Removers

NAME TYPE METHOD
class/form
SENSITIVITY
LEVEL
AMS-2644
QPL4
GENERAL DESCRIPTION
E-50 II B NA YES Lipophilic emulsifier for VP-31A.
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-502 II C, class 3 NA NA Special high temperature remover for VP-302.
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-78B I & II form c NA YES Aqueous suspendable developer.

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