nternal Rotary Inspection System Tube Eddy Current Tube Standards. Ready to request a quote for a standard? Here's what we need... What is the material? (Alloy, OD and Wall) Is NDE supplying the material or will it be customer supplied? What defects are needed and what size? (most depths are given in % of tube wall) Is there a specification the standard needs to comply with? (ASME, etc.) If you have a drawing, or even a simple hand sketch, please send that along as well. We specialize in custom eddy current tubes, and have years of experience in machining a huge range of defects. From TWHs and FBHs, OD and ID grooves, milled flats, and OD and ID thinning bands, to ID FBHs, ID contoured flats, 120°/180° wearscars, tapered flaws, and tube-to-tube wear,