標準號：SIS SS-ISO 9404-1-1992
中文標準名稱：防護致電離輻射外圍設備．150毫米、200毫米及250毫米厚墻鉛屏蔽構件．第1部分：厚度為150毫米和200毫米的人字形構件
英文標準名稱：Enclosures for protection against ionizing radiation — Lead shielding units for 150 mm,200 mm and 250 mm thick walls — Part 1: Chevron units of 150 mm and200 mm thickness
發(fā)布日期：1992/6/3 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This part of ISO 9404 specifies the properties of the various lead units used in the construction of shielded enclosures for protection against ionizing radiation. The units dealt with are:— basic units: bricks, posts;— functional units: aperture bricks, windows, sphere units, plugs and reducing units.Only bricks for walls of 150 mm thickness are standardized in this part of ISO 9404. Since four- and five-chevron bricks are not manufactured, 200 mm and 250 mm thick walls are con-structed with bricks of 50 mm, 100 mm and 150 mm thickness.The 150 mm and 200 mm shielding units are dealt with separately in two sections for clarity. The 50 mm and 100 mm shielding units are standardized in ISO 7212.