NM01291050055

The Met-L-Chek® FP-922 Fluorescent Penetrant, available in a substantial 55 Gallon Drum (208 Liters), is a meticulously engineered liquid penetrant designed for the non-destructive testing (NDT) of materials to reveal surface-breaking flaws. Classified as a Level 2 sensitivity penetrant according to industry standards, FP-922 offers a balanced capability for detecting both fine and medium-sized surface discontinuities in a wide array of non-porous materials, including metals, ceramics, and certain composites.

This penetrant is a Type 1 fluorescent product, meaning it contains specialized fluorescent dyes that, when exposed to ultraviolet-A (UV-A) light (black light) after the inspection process, will emit a bright yellow-green glow. This fluorescence sharply contrasts against the typically darker background of the test surface, making even subtle indications of flaws such as cracks, seams, laps, porosity, and lack of fusion readily visible to the trained inspector.

A key feature of Met-L-Chek® FP-922 is its dual method of excess penetrant removal. It is primarily designed as a water-washable penetrant (Method A). Following the designated dwell time, during which the penetrant seeps into any surface flaws, the excess material on the surface can be efficiently and effectively removed by a simple rinse with water. This water-washable characteristic streamlines the inspection process, often eliminating the need for separate, potentially hazardous solvent removers, contributing to a more environmentally friendly and cost-effective operation.

However, FP-922 also holds approval for Method C (solvent removable) as outlined in AMS-2644. This provides flexibility for specific inspection scenarios where a solvent wipe-off technique is preferred or necessary. In such cases, designated non-aqueous solvent removers, compatible with the penetrant and the material under inspection, can be used to carefully remove the excess penetrant from the surface prior to the application of a developer.

The approval of Met-L-Chek® FP-922 to the stringent requirements of AMS-2644 is a testament to its high quality and reliable performance. AMS-2644 is a critical aerospace material specification that sets rigorous standards for penetrant testing materials. This approval underscores the suitability of FP-922 for use in aerospace applications and other industries that demand high levels of quality assurance in their material inspection processes.

Furthermore, the formulation of FP-922 is notable for its low sulfur and halogen content. This characteristic is essential when inspecting sensitive metallic alloys, such as titanium, nickel-based alloys, and stainless steels, as high levels of sulfur or halogens can potentially lead to corrosion, embrittlement, or other detrimental effects on these materials.

Physically, Met-L-Chek® FP-922 is typically a clear, yellow-green viscous liquid. Its viscosity is carefully controlled to allow for effective penetration into flaws while also facilitating ease of application through various methods, including immersion of parts, spraying onto surfaces, or localized application using a brush or wipe.

As a Level 2 sensitivity penetrant, FP-922 is designed to strike a balance between the high sensitivity of Level 3 penetrants (for very fine flaws) and the lower sensitivity of Level 1 penetrants (for larger, more obvious defects). This medium sensitivity makes it a versatile choice for a broad range of inspection tasks where the expected flaw sizes fall within this spectrum.

In addition to AMS-2644, Met-L-Chek® FP-922 also meets the requirements of several other key industry specifications, including AMS-2647, ASME Boiler and Pressure Vessel Code Section V, ASTM E-165, and ASTM E-1417. This broad compliance further validates its quality and applicability across diverse industrial sectors.

Supplied in a large 55 Gallon Drum, FP-922 offers a cost-effective solution for facilities with significant and ongoing penetrant testing needs. The bulk packaging reduces the frequency of reordering and minimizes waste associated with smaller containers, making it a practical choice for larger operations.