NDT Quality Hub

  NDT inspection workflow showing ITP review, RFI, hold and witness points, examination, evaluation, repair, re-examination, reporting and final acceptance. Introduction In NDT, welding inspection, fabrication and QA/QC activities, inspection does not happen randomly. Important inspection stages are normally defined in an Inspection and Test Plan (ITP) so that the right activity is checked at the right time and the required inspection records are generated. Two terms that frequently create confusion on site are Hold Point (HP) and Witness Point (WP) . A technician or inspector may hear: “This is a Hold Point. Stop the work.” or: “This is a Witness Point. Raise the inspection request and inform the client.” Although both are inspection control points, they do not have the same meaning. A Hold Point is a mandatory control stage where work must not proceed beyond the specified point until the required inspection, verification or release has been completed according to the approved p...

Complete NDT inspection workflow covering planning, equipment verification, examination, indication evaluation, and final reporting. Introduction Non-Destructive Testing (NDT) is an important part of quality control and inspection because it allows materials, welds, components and structures to be examined without damaging their intended serviceability. However, reliable NDT does not depend only on selecting a testing method and performing an examination. A proper NDT inspection procedure involves several stages, starting with reviewing the applicable drawings and specifications and continuing through examination, evaluation, acceptance, documentation and reporting. An inspector may have the correct equipment and technical knowledge, but an inspection can still produce an unreliable result if the wrong procedure, examination extent, calibration requirement or acceptance criterion is used. A systematic NDT inspection procedure helps ensure that: The correct component is inspec...