An industry standard for decades, liquid penetrant testing—also known as zyglo testing, PT services, fluorescent testing, or dye penetrant testing—remains one of the most reliable, efficient, and cost-effective nondestructive methods for detecting surface flaws in non-porous metals. 

Liquid penetrant inspection is a valuable tool for evaluating the surfaces of welds, castings, and other components that cannot be destroyed. In addition to checking for cracks, it can also be used to determine other surface characteristics, such as porosity. 

Liquid penetrant inspection is performed by examining defects made visible by a penetrant fluid. After applying a liquid dye and allowing for proper dwell time, the part is cleaned and a developing powder is applied. The developer pulls up liquid that has seeped into cracks or pores, resulting in visible marks that identify defects. An inspector can then provide a report with the type, number and size of defects on a component.

Element’s Expertise in Penetrant Inspection

Element’s non-destructive experts are well-trained in liquid penetrant inspection, and hold Level II and III certifications from ASNT, among other qualifications. Element experts provide Type II non-fluorescent NDT services to all of the various commercial and nuclear codes, as well as Type I fluorescent inspection to aerospace, government, nuclear, and after-market applications. 

Element offers a variety of liquid penetrant inspection options, including:

  • A 55’ x 15’ wet room equipped with a 2.5-ton hoist for processing large specimens
  • All methods of dye penetrant inspection, including lipophilic and hydrophilic emulsified systems, as well as water washable and solvent removable to meet any sensitivity requirements.
  • Certification by major prime contractors for the inspection of fracture critical hardware.
  • In-house pre-penetrant etch capability, which allows for "one-stop lab" processing
Liquid Penetrant Inspection

Standards We Test To

American Metals Society
AMS 2645, AMS 2646, AMS 2647
American National Standards Institute
ANSI/ASME B31.1, ANSI/ASME B31.3
American Petroleum Institute
API 1104
American Society of Mechanical Engineers
ASME Section III, ASME Section V, ASME Section VIII
American Society for Metals
ASM 2700
American Society of Non-Destructive Testing
NDT 8
American Society for Testing and Materials
ASTM E165, ASTM E1417, ASTM E1418
American Welding Society
AWS D1.1
Deutsches Institut Fur Normung E.V.
DIN EN 571-1, DIN EN ISO 3452-5, DIN EN ISO 3452-6, DIN EN 10228-2, DIN EN ISO 3452-2, DIN EN 1371-1, DIN EN 1371-2
Euronorm
EN 571
Military Standard
MIL STD 271F, MIL STD 6866, NAVSEA T9074-AS-GIB-010/271, MIL-STD-2132, MIL-I-6866, MIL-STD-1907
National Aerospace Standard
NAS410
Society of Automotive Engineers
SAE J426
Various Customer Specifications
Including Aerojet Rocketdyne, Boeing, Bombardier, Cessna, GE, Hamilton Sunstrand, Honeywell, Northrop Grumman, Rolls Royce, etc.
 
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Comprehensive Non Destructive Testing Services

Element offers a complete range of NDT capabilities along with unparalleled expertise and worldwide capacity. Element’s NDT services can be provided both in the laboratory and at virtually any customer site across the US, UK, and Europe.

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