英国劳氏船级社无损检测验收要求

RT 验收标准
Acceptance criteria for radiographic testing, see Note 1 射线检测接受标准，见注释1 Not accepted 不允许 1）Continuous maximum length t/2 or 25 mm, whichever is the less, see Note 2 连续最大长度不大于 min（t/2，25） 2）Intermittent cumulative length maximum t or 50 mm,whichever is less, see Note 3 断续累积长度不大于min（t，50） Not accepted in butt joints welded from one side 单面焊不允许 1）Not accepted in butt joints welded from one side 单面焊不允许 2）Continuous maximum length t/2 or 25 mm, whichever islesser, see Note 2 连续最大长度不大于 min（t/2，25） 3）Intermittent cumulative maximum length t or 50 mm,whichever is less, see Note 3 断续累积长度不大于min（t，50） 1）Continuous maximum length t or 50 mm, whichever is less, see Note 2. 连续最大长度不大于 min（t，50） 2）Intermittent cumulative length maximum 2t or 100 mm, whichever is less, see Notes 3 and 4 断续累积长度不大于min（2t，100） Maximum dimension for a single pore:d . 0,2t, max. 4,0 mm, see Note 5 单个气孔最大直径d≤min（t/5，4） Maximum dimension of the area of imperfections: 不合格区域尺寸 1）For single run welds: . 1,5% 单道焊：1.5% 2）For multi-run welds: . 3% 多道焊：3% See Notes 6 and 7 Maximum dimension of the summation of the projected area of the imperfection: 8%, See Notes 6 and 7 缺陷区域最大累积面积：8% h ≤0,3t, max. 3,0 mm l ≤ t, max. 50 mm See Notes 8 and 9 宽度 h≤ min（0.3t，3.0）长度 L≤ min（t，50） h ≤0,3t, max. 3,0 mm l ≤ t, max. 50 mm See Notes 8 and 9 宽度 h≤ min（0.3t，3.0）长度 L≤ min（t，50） h ≤0,3t, max. 3,0 mm See Note 8 非铜金属夹杂，宽度 h≤min（0.3t，3） Not permitted 不允许
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NOTES（注释） 1. t is the thickness of the thinnest plate. t为最薄的板厚 2. Two adjacent individual discontinuities of length ld1 and ld2 situated on a line and where the distance ld between them the shortest discontinuity are to be regarded as a continuous discontinuity of length ld1 + ld + ld2 . 位于同一直线上的两独立不连续ld1/ld2，如果其间距ld小于两者中较小段的长度，则视作为一个缺陷，其长度L=ld1+ 3. Sum of the length of individual continuous discontinuities. 独立连续缺陷的总长 4. Parallel inclusions not separated by more than 3 times the width of the largest inclusion are to be regarded as one cont 平行夹渣如其间距小于其中最大夹渣3倍宽度的，则视作一个连续夹渣 5. d is the diameter of the gas pore. d为气孔的直径 6. The limits for the maximum single gas pore within this group still apply. 在此，最大气孔直径的规定仍然适用 7. Further reference to porosity limits may be obtained in ISO 5817:2007. 更多有关气孔限值信息参考ISO 5817-2007 8. h is the width of the imperfection. h为不连续的宽度 9. l is the length of the imperfection. l为不连续的长度
RT 验收标准
Discontinuity 不连续 Crack 裂纹 Classification according to ISO 6520-1 按ISO 6520-1分类 100
Lack of fusion 未熔合
401
Lack of root fusion 未熔合
4013
Incomplete root penetration 根部未焊透
4021
Slag inclusion 夹渣
wk.baidu.com
301
Gas pore 气孔
2011
Uniformly distributed porosity 规则分布气孔
2012
Clustered (localised) porosity 密集气孔（局部） Elongated cavity 线性内凹 Wormholes 虫孔 Metallic inclusions other than copper 非铜金属夹渣 Copper inclusions 铜夹渣
a line and where the distance ld between them is shorter than of length ld1 + ld + ld2 . 小段的长度，则视作为一个缺陷，其长度L=ld1+ld+ld2
largest inclusion are to be regarded as one continuous discontinuity.