MODUK DEF STAN 02-729: PART 5 PDF

This part of Defence Standard 02-729 covers the procedures and methods to be used for the Quality Assessment of Ultrasonic Examining Authorities and for the ultrasonic examination of welded and brazed joints, cast and wrought materials, weld metal cladding, pipes and tubes in HM Submarines and Surface Ships not in Class. The methods described are the minimum requirements for the detection of surface and sub-surface imperfections and for the measurement of plate, and tube wall, thickness.

This Defence Standard (Def Stan) also includes the minimum requirements for the ultrasonic examination of RN GRP structures for the detection of delamination(s). The effective application of ultrasonic examination techniques and methods described in this standard may be restricted in materials with inherently high or variable attenuation or which produce severe scattering of the ultrasonic beam. Complex shapes may also limit satisfactory application and the examination is to be applied at stages during manufacture when the geometry of the component is relatively simple, provided that subsequent specified treatments of the material do not render the examination ineffective.

This Def Stan does not contain acceptance criteria for any imperfection thus revealed and does not apply to nuclear plant and machinery to which DG Ships/PS/5108 applies. The extent to which ultrasonic examination is required is not included herein but will be stated in the relevant Contract Documents.