R-502 finds wide use in field weld and weld repair inspection. It is used in the inspection of refinery processing equipment that is at elevated temperatures, speeding up the inspection process time by eliminating the cool down required for standard penetrant processing. Protective gloves should be worn while working on hot surfaces to avoid burns.
R-502 is a special application high temperature inspection penetrant remover used as a Method C remover. It is used with high temperature visible penetrant VP-302. The use range is 51.6 ˚C – 176.6 ˚C (125˚F -350˚F). R-502 is applied to a cloth and used to wipe remove the penetrant from the inspection surface. On smooth surfaces the penetrant may wipe off readily, but on rougher surfaces the use of the remover helps to reduce the background color. This makes the actual flaw indications easier to see.