厦门船舶重工股份有限公司
XiaMen Shipbuilding Industry Co.,Ltd. 年 5 月 20 日 第 1 版 / 第 0 次修改 2012 无损检测
（UT）工艺规程 XSI/QMD-NDT-UT-01
图9 安放式管座角焊缝 Figure 9 Pipe bestowing weld
①在接管内壁采用直探头检测，见图8位置1。
① In the inner wall of joint pipe adopts the straight probe detection, see Figure 8 position 1.
②在容器内壁采用直探头检测，见图9位置1。
② In the inner wall of the container using straight probe detection, see Figure 9 position 1. ③在接管外壁采用斜探头检测，见图9位置2。
③ In the outer wall of joint pipe adopts oblique probe detection, see Figure 9 position 2. ④在按管内壁采用斜探头检测，见图8位置3和图9位置3。
④ In the inner wall of joint pipe adopts oblique probe detection, see position 3 in figure 8 and Figure 9.
⑤在容器外壁采用斜探头检测，见图8位置2。
⑤ In the outer wall of the container adopts oblique probe detection, see Figure 8 position 2.
⑶管座角焊缝以直探头检测为主，探头频率、尺寸及扫查方法应按12.7条的规定执行。对直探头扫查不到的区域，可采用斜探头检测。
⑶ The pipe seat fillet welds inspected by straight probe primarily, the probe frequency, size and scanning methods should be according to the regulation of 12.7 article. The region that straight probe can not scan, can inspected by oblique probe.
12.8.4
T型焊缝的检测 T weld detection
⑴腹板厚度不同时，选用的折射角见表6，斜探头在腹板一侧作直射法和一次反射法探伤见图10位置2。
⑴ When the web thickness is distinctness, the selection of refraction angle shown in Table 6. Oblique probe testing on web side with the inspection method of straight eradiation and principal reflection is shown in figure 10 position 2.
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厦门船舶重工股份有限公司
XiaMen Shipbuilding Industry Co.,Ltd. 年 5 月 20 日 第 1 版 / 第 0 次修改 2012 无损检测
（UT）工艺规程 XSI/QMD-NDT-UT-01
图10 T型接头 Figure 10 T joint
图11 T型接头 Figure 11 T joint
⑵采用折射角45°（K1）探头在腹板一侧作直射法和一次反射法探测焊缝及腹板侧热影响区的裂纹（图11）
⑵ Using the angle of 45° (K1) probe with inspection methods of straight eradiation and principal reflection on the web side to detect crack in weld and heat affected zone of web side (Figure 11).
⑶为探测腹板和翼板间未焊透或翼板侧焊缝下层撕裂状缺陷，可采用直探头（图10位置1）或斜探头（图11位置3）在翼板外侧探伤或采用折射角45°（K1）探头在翼板内侧作一次反射法探伤（图10位置3）。
⑶ In order to detect the incomplete penetration defects between web and wing plate or avulsion defects in underlayer weld of wing plate, can use straight probe (FIG. 10 position 1) or oblique probe(Figure 11 position 3) on the wing plate lateral to inspect, or use the refraction angle of 45°(K1) probe on the wing plate inside to inspect with principal reflection testing (Fig 10 position 3).
12.8.5 角接焊缝的检测 Corner weld detection 角接接头探伤面及折射角一般按图12和表6选择。
The choice of inspection surface and refraction angle of probe in corner joint detection is according to Figure 12 and table 6.
质量管理部 第 16 页 让更多“厦门型”船舶航行于四海 NDT室
厦门船舶重工股份有限公司
XiaMen Shipbuilding Industry Co.,Ltd. 年 5 月 20 日 第 1 版 / 第 0 次修改 2012 无损检测
（UT）工艺规程 XSI/QMD-NDT-UT-01
图12 角接接头 Fig 12 Corner joint
13 评定 Assessing
13.1 缺陷定量检测 Quantitative detection of defects 13.1.1 灵敏度应调到定量线灵敏度。
13.1.1 The sensitivity should be transferred to the quantitative line sensitivity.
13.1.2对所有反射波幅超过定量线的缺陷，均应确定其位置、最大反射波幅和缺陷当量；缺陷定量应根据缺陷最大反射波幅确定缺陷当量直径Ф或缺陷指示长度ΔL。
13.1.2 All the defects that echo amplitude over the quantitative line, should be determined location, maximum echo amplitude and equivalent defect; quantitative defect should be based on the maximum echo amplitude determined equivalent diameter Φ or indicated length ΔL of defects.
⑴缺陷当量直径Ф，用当量平底孔直径表示，主要用于直探头检测，可采用公式计算，距离一幅曲线和试块对比来确定缺陷当量尺寸。
⑴ The equivalent diameter Φ of defect, denoted of equivalent hole diameter, is mainly used in straight probe detection, can calculate with formula, or determine by DAC curve contrast to test block.
⑵缺陷指示长度ΔL的测定、：
⑵ The indicated length ΔL meterage of defects: ①缺陷回波位于Ⅰ区： ① Defect echo is in region Ⅰ:
当只有一个峰幅时，以峰幅降到评定线的绝对灵敏度法测其指示长度。
When there have only one peak amplitude, measured the indicating length by the absolute sensitivity method that dropping peak amplitude to evaluating line.
当有多个峰幅时，以端点峰幅降到评定线的绝对灵敏度法测其指示长度。
When there have many peak amplitudes, measured the indicating length by the absolute sensitivity method that dropping extremity peak amplitude to evaluating line.
②缺陷回波高于Ⅱ区：
② Defect echo is in region Ⅱ:
当只有一个峰幅时，以峰幅降低6dB的相对灵敏度法测其指示长度。
When there have only one peak amplitude, measured the indicating length by the relative sensitivity method that dropping low 6dB of peak amplitude.
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厦门船舶重工股份有限公司
XiaMen Shipbuilding Industry Co.,Ltd. 年 5 月 20 日 第 1 版 / 第 0 次修改 2012 无损检测
（UT）工艺规程 XSI/QMD-NDT-UT-01 当有多个峰幅时，以端点峰幅低6dB的相对灵敏度法测其指示长度。
When there have many peak amplitudes, measured the indicating length by the relative sensitivity method that dropping low 6dB of extremity peak amplitude.
13.2缺陷评定 Defect evaluation
13.2.1超过评定线的信号应注意其是否具有裂纹等危害性缺陷特征，如有怀疑时，应采取改变探头K值、增加检测面、观察静、动态波型并结合结构形式和焊接工艺等要素作判断，如对波型不能判断时，应辅以其它检测方法作综合判定。
13.2.1 Defect signal over the evaluating line signal should be paid attention to whether it has character of harmfulness flaw like crack. In case of doubt, should change K value probe, increase detection surface, observe static and dynamic wave from and combined with structure and welding technics to judge. If the wave shape can not be judged, should be supplemented by other detection methods for comprehensive judgement.
13.2.2缺陷指示长度小于8mm时按4mm计。
13.2.2 When the indicated length of defect less than 8mm counted with 4mm.
13.2.3相临两缺陷在一直线上，其间距小于其中较小的缺陷长度时，应作为一条缺陷处理，以两缺陷长度之和作为其指示长度（间距不计入缺陷长度）。
13.2.3 When two near defects on a straight line, the span less than the smaller defect length, should be as one defect, the sum of two defect lengths as the instruction length (the span without defect length).
13.3 缺陷等级评定 Defects classification 13.3.1不允许存在下列缺陷：
13.3.1 The following defects are not allowed: ⑴反射波幅位于判废线及Ⅲ区的缺陷；
⑴ Defects that its reflex amplitude in the sentence line and III area. ⑵检测人员判定为裂纹等危害性的缺陷；
⑵ Defects that judged to harmfulness flaw like crack by detection personnel. 13.3.2最大反射波幅位于Ⅰ区的非裂纹类缺陷，均评为Ⅰ级。
13.3.2 Non crack defect that its maximum reflection amplitude is in regionⅠ, rated as gradeⅠ.
13.3.3最大反射波幅位于Ⅱ区的缺陷，应根据其指示长度按表7的规定予以评级。 13.3.3 The defect that its maximum reflection amplitude is in region Ⅱ, should be rated according to the instruction length based on rules in Table 7.
表7 Ⅱ区缺陷的等级评定 Table 7 Evaluation of defect in the region Ⅱ
等级 单个缺陷指示长度 L L＝1/3T，最小为8， 最大不超过24 L＝1/2T，最小为12， 最大不超过36 L＝3/4T，最小为16， 最大不超过48 任意6T或150mm（二者取较小）内多个缺陷的累积指示长度L′ 2T Ⅰ Ⅱ Ⅲ 2.5T 3T 质量管理部 第 18 页 让更多“厦门型”船舶航行于四海 NDT室
厦门船舶重工股份有限公司
XiaMen Shipbuilding Industry Co.,Ltd. 年 5 月 20 日 第 1 版 / 第 0 次修改 2012 Ⅳ Ⅴ 注：⑴板厚不等的焊缝，以薄板为准。
无损检测
（UT）工艺规程 XSI/QMD-NDT-UT-01 4T L＝T，最小为20， 最大不超过60 大于Ⅳ级 Note:⑴ When the thickness of base materials are difference, take the thinness.
⑵最小—指T小于某一厚度时的允许值；如Ⅰ级焊缝，当T≤24mm时，允许单个缺陷指示长度为8mm。
⑵ Minimum - Allowed values that T is less than a certain thickness; such as for grade I weld, when T≤24mm, allows a single defect indication length is 8mm.
⑶最大--指T大于某一厚度时的允许值；如Ⅰ级焊缝，当T≥24mm时，允许单个缺陷指示长度不得大于24mm。
⑶ Maximum - Allowed values that T is more than a certain thickness; such as for grade I weld, when T≥24mm, allows a single indicated defect length should not more than 24mm.
⑷当焊缝长度不足6T或150mm时（二者取较小）时，可按比例折算，折算后允许的累计长度小于单个缺陷的允许长度时，以单个缺陷的允许长度作为限值。
⑷ When weld length less than 6T or 150mm (take the smaller), can converted according to proportion, when the converted permit cumulative length less than the permit length of single defect, take the permit length of single defect limit value.
⑸两个缺陷在任意6T或150mm时（二者取较小）焊缝长度内都能取到一部分，则应将这两个缺陷全部指示长度计入总长评定。
⑸ When two defects in any 6T or 150mm (take the smaller) of weld length can be taken parts, all the instruction length of two defects should be included in the total length for evaluation.
13.3.4不合格的缺陷应予以返修。返修部位及热影响区仍按原检测工艺进行检测。 13.3.4 Unqualified defect should be repaired. Repair position and heat affected zone still be tested according to the original detection technology.
13.3.5抽检部位的一端或者两端出现超标缺陷时，应在其延伸方向追加检测，并不应少于原抽检量，若追加的检测部位仍发现超标缺陷，则应对整条焊缝进行检测。
13.3.5 When unqualified defect appear in sampling site at one end or two ends, should be additional tested in the extending direction, and should not less than the original sample amount, if additional testing site is still found unqualified defect, the entire weld should be checked.
14 记录 Records
14.1《超声检测申请单》
14.1 \14.2《超声波检测记录》 14.2 \
15 报告 Report
15.1《超声波检测报告》
15.1 \
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