VP-31A is a visible (Type 2), post emulsifiable (Method B) and solvent removable (Method C) inspection penetrant. It is designed for use in general metalworking, welding, nuclear and automotive applications for surface flaw and through leak detection. VP-31A is used with E-50 emulsifier for Method B processing which renders the penetrant water washable. Visible penetrants are not rated by sensitivity levels per AMS-2644 but are considered approximate to level 1 fluorescent penetrants. 50ì discontinuities are readily detected and under controlled
conditions 30ì size defects may be high lighted by visible penetrants. ISO-3452-2005 does rate visible penetrants by sensitivity level with #2 being the most sensitive. VP-31A is a level 2 per this specifications requirements.
VP-31A is listed on the Qualified Products List for AMS-2644E. It meets the requirements of ASME Boiler and Pressure Vessel Code, ASTM E-165, ASTM E-1417, and ISO- 3452-2005 for penetrant
inspection materials. It is low in Sulfur, Chlorine, Fluorine and other Halogens, making it safe for use on Titanium and high Nickel alloys found in aerospace, medical and nuclear components.
Specifications
AMS-2644E
ASME B & PV code 07 sec V
ASTM E-165
ASTM E-1417
ISO-3452-2005
NAVSEA-T9074-AS-GIB-010/271
RCC-M rev 2000
Typical Physical Properties
Form: red liquid
Density: 880 g/L
Flash Point: > 93.3¢ªC (> 200¢ªF)
Viscosity: 6.2 mm2/s
Water Tolerance: > 5%
Corrosion of aluminum: none
Corrosion of carbon steel: none
Corrosion of magnesium: none
Corrosion of stainless steel: none
Corrosion of titanium: none
Chloride content: < 100 ppm (< 0.01%)
Fluoride content: < 50 ppm (< 0.005%)
Sulfur content: < 150 ppm (< 0.015%)
Mercury: none
VOC¡¯s: 0 g/L
Ozone layer depleting substances: none
PCB¡¯s: none
