[en] This specification sets out the techniques for the radiographic (X-radiation or gamma-radiation) examination of fusion welded joints of vessels and pipelines fabricated from (a) mild steel, stainless steel and Ni-Cr iron alloy; (b) aluminium and aluminium alloys; and (c) copper and copper alloys, nickel and nickel alloys (excepting Ni-Cr iron), up to specified thicknesses. (U.K.)