阀门受压铸钢件射线照相检测 评定区的大小及夹砂、夹渣的最大允许点数
缺陷等级 |
透 照 厚 度 mm |
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≤10 | >10~20 | >20~40 | >40~80 | >80~120 | >120~200 | >200~300 | |
评 定 区(直径) mm |
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20 | 30 | 50 | 50 | 70 | 70 | 100 | |
夹 砂 和 夹 渣 的 最 大 允 许 点 数 | |||||||
1 | 5 | 8 | 12 | 16 | 20 | 24 | 28 |
2 | 7 | 11 | 17 | 22 | 28 | 34 | 42 |
3 | 10 | 16 | 23 | 29 | 36 | 44 | 55 |
4 | 14 | 23 | 30 | 38 | 46 | 54 | 76 |
5 | 21 | 32 | 40 | 50 | 60 | 70 | 90 |
6 | 缺陷点数超过5级者;缺陷尺寸超过30mm者 |
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