#ASME SECTION V ARTICLE 6 FREE#

UV-A lights should achieve a minimum of 1000 ОјW/cm2 on the surface of the part being examined throughout the examination.The examination area should be illuminated with UV-A lights that operate in the range between 320 nm and 400 nm.Glasses or lenses worn by examiners should not be photosensitive. Examiners should be in a darkened area for at least 5 min prior to performing examinations to enable their eyes to adapt to dark viewing.It should be performed in a darkened area with a maximum ambient white light level of 2 fcВ (21.5 lx) measured with a calibrated white light meter at the examination surface.Nonaqueous developers should be applied by spraying however, Nonaqueous developers can be applied by brushing when safety or restricted access doesnвЂ™t allow the application of developer by spraying.Drying time can be decreased by using warm air, provided the surface temperature of the part is not raised above 125вЏ (52вЊ). It should be applied by dipping, brushing, spraying, or other means provided a thin coating is obtained over the entire surface being examined. The aqueous developer can be applied to either a wet or dry surface.Thin and Uniform Developer Coating Wet Developer Application. Dry Developer Application.Дry developer should be applied only to a dry surface by a soft brush, hand bulb, powder gun, or other means, provided the powder is dusted evenly over the entire surface being examined. The developer should be applied as soon as possible after penetrant removal and test surface becomes dry. For the solvent removable technique, the surfaces can be dried by normal evaporation, blotting, wiping, or forced air.For the water-washable or post-emulsifying technique, the surfaces can be dried by blotting with clean materials or by using circulating air, provided the temperature of the surface is not raised above 125вЏ (52вЊ).WARNING: Flushing the surface with solvent, following the application of the penetrant and prior to developing, is prohibited. Note: To minimize removal of penetrant from discontinuities, care should be taken to avoid the use of excess solvent.The remaining traces should be removed by wiping the surface with a cloth or absorbent paper, lightly Moistened with solvent.Excess solvent removable penetrants should be removed by wiping with a clean, dry, lint-free cloth or absorbent paper, repeating the operation until most traces of penetrant have been removed.

Note :To minimize removal of penetrant from discontinuities, care should be taken to avoid the use of excess water.

The remaining traces should be removed by wiping the surface with a cloth or absorbent paper, lightly moistened with water.

As an alternative to (a), water-washable penetrants can be removed by wiping with a clean, dry, lint-free cloth or absorbent paper, repeating the operation until most traces of penetrant have been removed.

the water temperature should not exceed 110вЏ (43вЊ).

The water pressure should not exceed 50 psi (350 kPa),.

Excess water-washable penetrants should be removed with a water spray.

The penetrant can be applied by any suitable means, such as

MATERIALS used should be in within expiry due date provided by the manufacturer APPLICATION OF PENETRANT If meters have not been in use for one year or more, calibration should be done before being used.

Local heating or cooling is permitted provided the part temperature remains in the Range of 40вЏ to 125вЏ (5вЊ to 52вЊ) during the examination.Д®quipment like Light meters, both visible and fluorescent (black) light meters, should be calibrated at least once a year or whenever the meter has been repaired.

As a standard technique, the temperature of the penetrant and the surface of the part to be processed should not be below 40вЏ (5вЊ) nor above 125вЏ (52вЊ) throughout the examination period.

drying of the surfaces to be examined should be accomplished by normal evaporation or with forced hot or cold air after Precleaning.

Prior to the application of the penetrant, it should be ensured that the cleaning solution has evaporated.

Note: Cleaning operations like power wire brushing, grit blasting, shot peening and other metal smearing operations must be avoided. Degreasing and ultrasonic cleaning methods can also be used.

Typical cleaning agents which can be used are detergents, organic solvents, descaling solutions, and paint removers.

#ASME SECTION V ARTICLE 6 FREE#

(25 mm) becomes dry and free of all dirt, grease, lint, scale, welding flux, weld spatter, paint, oil, and other extraneous matter that could obscure surface openings or otherwise interfere with the examination. Precleaning should be carried out so that the surface to be examined and all adjacent areas within at least 1 in.the surface of the part should be in the as-welded, as-rolled, as-cast, or as-forged condition.To learn more about above mentioned steps read our blog : INTRODUCTION TO LIQUID PENETRANT TESTING(PT)

Asme section v article 6