BS 7257:1989被替代
Methods for radiographic examination of fusion welded branch and nozzle joints in steel
出版：British Standards Institution
专家解读视频
基本信息
标准编号： BS 7257:1989
发布时间：1989/12/31 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：36
标准简介
Techniques, film types, radiation sources, protection, surface condition, identification, marking, IQIs, screens, processing and viewing. Appendices give background information on techniques and guidance on their use.
标准备注
© British Standards Institution 2013
Amendment notes:
AMD 6641 published 21 December 1990
替代本标准的新标准
