where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
NDT.net Issue - 2018-11 - NEWS
NDT.net Issue: 2018-11
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)

Introducing the multiple-angle TOFD wedge

Innovation Polymers7, Kitchener, Ontario, Canada

High Density Poly Ethylene (HDPE) pipe is becoming a popular substitute for steel pipe. Varieties of polyethylene used in industry can have an acoustic velocity range from about 2100m/s to about 2600m/s. Using PMMA or polystyrene as a refracting wedge material could result in very little refraction or even negative refraction. Elastomeric materials designed by Innovation Polymers range from approximately 1025m/s to about 1600m/s, ensuring positive refraction for all applications on polyethylene.

Innovation Polymers has designed wedges specifically for TOFD applications on HDPE. Interchangeable plugs made from Innovation Polymers’ low velocity elastomeric polymers permits the user to select a refracted-angle option best suited for the TOFD inspection at hand. These wedges are primarily intended for the TOFD inspection of high density polyethylene butt fusion joints. The modular concept consists of a standard housing, replaceable plug inserts and a threaded plate to accommodate different sized probes up to 12.5mm (0.5 inch) diameter.

  • Standard plates are anodized aluminium with either 3/8-32 or 11/16-24 threaded opening for probes.
  • Standard incident angle is 35° on a flat contact surface.
  • Standard plugs are available in ACETM, AqualeneTM, and AqualinkTM.

    The standard materials provide refracted angles based on the polymer tested. User determines the best plug material, based on the polymer tested, its thickness, and the Probe Centre Spacing (PCS) for the desired depth of the beam crossing point.

    The flat wedge design with the soft polymer plugs allows the wedge to form to radii as low as 3” OD. Radiused wedges are available as a special order.

    Supplied with irrigation nozzles. Custom modifications can be made to accommodate different incident angles for the holder, different size of threaded probe-plates and curvatures can be added to the holder to better adapt the wedge holder to curved surfaces.

    Scan of 25.5mm HDPE plate (2530 m/s) with ACETM400 insert. PCS=82mm. Five 10mm long Vee notches

    For further information download PRODUCTS & APPLICATIONS

    Visit: Innovation Polymers

    Feedback: ()

    More from "Innovation Polymers" (5 of 6)
    2020-07New Elastomeric Wedge Design Improves Phased Array Sectorial Scanning of HDPE Butt-Fusion Joints NEWS
    2019-04Advanced Ultrasonic Couplant for Long Term Probe Placement NEWS
    2017-03Low Velocity Elastomer Polymer Wedges Applied to Phased Array Probes
    2016-12A Multi-Modality 3D Image Quality Assessment Standard
    2016-05Low Velocity Elastomer Polymer Wedges Applied to TOFD
    ... All 6 Details >
    We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
    this is debug window