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1、Last week, our economic work Conference held today, held the Countys rural areas for work and five water treatment, three to split Conference, which this year was a matter of Thirteen-Five important meeting of our Countys economic and social development. The main task of the meeting was, on rural wo
2、rk and conscientiously implement the Central, provincial and municipal five water treatment, three to split series of important conferences, learn from the past, study deployment priority tasks this year. Just now, the XXX Deputy head and Deputy County magistrate, respectively, on the work of the XX
3、 was fully deployed, and put forward specific measures and requirements about is in place. County Environmental Protection Bureau, the XX town, town of XX 3 units for a position statement, resounding, demonstrated determination and confidence. Conference also recognition has advanced representative,
4、 this, I also representative County, and County Government, to by recognition of advanced said warm of congratulated! to rural, and water and three modified a split front General cadres workers extend sincere of greeting! following, I again told five points views: a, and deepening awareness, further
5、 enhanced work of sense and urgency since party of 18 session v plenary proposed has innovation, and coordination, and green, and open, and shared five big development concept Hou, rural and environment governance work can said was upgrade to has more high of strategy level, is Thirteen-Five build w
6、ell-off a top priority task. XX, County besides lingxi, Longgang, jinxiang, the Treasury, the hills, several industrial town outside the city centre, is basically belong to other rural areas, area, the vast rural population. Same time, the current and coming period, is the County into a crucial peri
7、od of the South Gate of XX beautiful, environmental regulation directly affects the effectiveness of the strategic objectives can not be achieved. Therefore, the focus on rural work and five water treatment, three to split, the XX economic and social development has an important role. Last year, thr
8、ough the joint efforts of the County, reform of the agricultural and rural development has made great progress in our County, environmental remediation and achieved initial results. Three agriculture agricultural modernization level continues to increase, new 4-level modern agriculture Park, release
9、d 20 agricultural leading enterprises above the county level, the County area of 200 acres of land more than eco-leisure, investments of more than 5 million Yuan reached more than more than 100 agricultural projects. Rural development has improved continuously, boutique line 1 completed the beautifu
10、l countryside, fine village 17, beautiful rural development conference was held in lingxi peach Lake in the city. Promote comprehensive rural reform, included in the provinces building three in one system of farmers cooperative economic organization first promoting the County. Improvement of farmers
11、A 初版实施REV版次签名日期签名日期签名日期MODI.修改STATUS状态编写 AUTH.审核 CHKD BY批准 APPD BY广东火电工程总公司GUANGDONG POWER ENGINEERINGCORPORATION文件号DOCUMENT NO.GPEC/JHP/OG/GL/002永安工程项目部 T型焊接接头焊缝超声检测专用版权所有COPYRIGHT GPEC/JHP 2009 Page 1 of12methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe
12、 welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels
13、7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vesse
14、l steel welded specification for construction and acceptance of oil tank 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering
15、 construction and acceptance specification for lifting 6 HG20201-2000 construction installation engineering construction standard 7, HG . Pressure gauges, using an installed spark arrestor for acetylene cylinders, illegal carrying, using gas cylinders, each operator fined 20 Yuan. Gas bottle without
16、 the hot sun exposure measures, responsibilities of team a fine of 50 Yuan. (7) at height and the opening and provisional protective measures have been taken,living standards, poor farmers in less than complete elimination of 4600 Yuan, 8949, 19008. Five waters rule: the County invested 2.169 billio
17、n yuan, similar counties line the citys first complete the 42 km of sewage pipe network construction, completion rate ranked first in the city, won the provincial rural sewage treatment work better; key pollution sources such as electroplating, papermaking, chemical industry management through verif
18、ication and acceptance of the municipal government, the County removed Black and odorous River, River waste, beginning of river ecological restoration effects. Three modified a split aspects: County total demolition illegal area up 2.759 million square meters, completed City issued annual task of 15
19、3%, split against area ranking city second; completed three modified area 4.846 million square meters, completed City issued annual task of 403%, ranking city third, which village in the a target completed total city ranking first; County Government was named city level three modified a split work a
20、dvanced. These achievements are hard won and should be appreciated. However, we are fully aware, the new period, and work in the countryside and the environment facing higher standards and requirements, provincial party Committee offered to high level build a comprehensive well-off society goal requ
21、ires no filth, dirty environment illegal buildings, into a well-off; municipal party Committee also proposes to build into the well-off benchmark goals of the city. Compared with the superior claim, South Gate of XX beautiful goal, my County San Nong and environment there are a number of weaknesses
22、and gaps, highlighted in the following five aspects: first, agriculture remained low pattern. Low is reflected in the quality and low; short, value added of the industry chain is low; 123 fusion yield low employee age, low quality. Small is reflected in smaller, specialized cooperatives throughout t
23、he County there were 3,396, but on the scale of too little. San is reflected in production, management, services, decentralized, centralized, standardized, brand, information and organizational level is not high. Second, the countryside is still in dirty phase. Dirty is dirty of rural sanitation sit
24、uation has not changed. Chaos is a village in rural housing construction planning, construction of disorder, no drawings, no construction, no vetting four no phenomenon, heap lying there. Bad is the weak rural base, village governance is poor. Thirdly, farmers continued to be persistent look. Old is
25、 aging, rural labor force accounted for 70% over the age of 50. Big is that the reform measures ground resistance, such as the transactions of property rights, land replacement; public service supply gap, rural education, health care, pensions and other services can not meet the demand still difficu
26、lt for poverty alleviation, with emphasis on poverty alleviation and 191. Hard is a peasants, peasants. Four water effects still lacks广东火电/建晖T型焊接接头角焊缝超声检测专用 版次：A 日期: 2009年11月目 录1.适用范围32.引用标准33.检验等级和扫查部位34.检验准备45.检验过程86.缺陷判定的规定107.检测结果的质量等级10发文范围：（共 份） 归档夹类：作业指导 夹号：14发文份数发文份数发文份数项目经理计划主管金检、焊接项目工地经理财务
27、主管调试项目总工程师合同主管资料归档施工部经理物资主管施工部副经理锅炉项目经营管理部汽管项目质安部电仪项目行政主管综合项目本版文件于 2004 年 月 日开始实施。 批准人：T型焊接接头角焊缝超声检测专用作业指导书1. 适用范围1.1. 本指导书适用于机械设备和钢结构焊接结构件。1.2. 板厚大于等于8mm的非奥氏体钢T形焊接接头角焊缝。1.3. 平板、管板、十字接头和直径大于500mm的管材T形焊接接头角焊缝。2. 引用标准2.1. GB5616常规无损探伤应用导则2.2. GB11345钢焊缝手工超声波探伤方法和探伤结果分级2.3. GB50205钢结构工程施工质量验收规范2.4. ZBY
28、232超声探伤用1号标准试块技术条件2.5. DL/T542钢熔化焊T形接头角焊缝超声波检验方法和质量分级2.6. DL5009.1-2002电力建设安全工作规程第一部分:火力发电厂3. 检验等级和扫查部位3.1. 检验等级钢结构T形焊接接头焊缝的检验分A、B、C三种等级。3.1.1. A级检验为普通检验等级，属于较为经济的检验，适用于承受静载荷焊接钢结构件。3.1.2. B级检验为中等检验等级，属于以质量控制为目的的完善性检验，适用于承受重复载荷焊缝强度要求较高的焊接钢结构件。3.1.3. C级检验为最高检验等级，属于高质量检验，适用于承受交变载荷、工况条件恶劣、因破坏能引起重大灾害事故的焊
29、接钢结构件。3.2. 扫查部件3.2.1. A级检验从翼板外侧用直探并没有和斜探头扫查焊缝及热影响区、扫查部位示意图1（a）（图见DL/T542-94，下同）。垂直于焊缝走向的探头移动的探头移动区为：P12K2+1+50P222tg+2K2+1+50式中：P1直探头移动区，mm；P2斜探头移动区，mm；1腹板厚度，mm；斜探头折射角K2翼板上的焊角尺寸，mm。3.2.2. B级检验一般情况下同3.2.1，但对焊接工艺不稳定，缺陷难于判定或者焊缝区易产生延迟裂纹的情况，还应从腹板两侧用斜探头进行辅助扫查，扫查部位见图1（b）。腹板表面垂直于焊缝走向的探头移动区为：P321tg+ K 1+50式中
30、：P3腹板上斜探头移动区，mm；1腹板厚度，mm；斜探头折射角，mm；K 1腹板上焊角尺寸，mm；3.2.3. C级检验应从翼板外侧用直探头和斜探头扫查焊缝及热影响区，同时还必须用斜探头从腹板两侧扫查焊缝，扫查部位见图1（a）、（b）。3.2.4. 如果受条件限制，腹板上的检测只能从一侧表面上进行，或者只能用斜探头的一次扫查时，应在检验记录和报告中加以注明。4. 检验准备4.1. 检测人员执行和实践本指导书的检测人员，必须持有国家技术监督检验检疫局颁发的UTII级及以上资格证书，并在有效期内。4.2. 探伤仪选用的超声探伤仪的各项性能指标，均应符合本公司的检测通用作业指导书规定。4.3. 探头
31、4.3.1. 推荐采用双晶片组合式直探头和斜探头，也可以使用普通的直探头和斜探头。在使用聚焦探头时直探头的聚焦深度应与T形接头焊缝的板厚相适应。斜探头的聚焦，在声束的有效探测区域内应使声束不发散且趋于收敛，焦点直径不大于5mm。4.3.2. 斜探头折射角的选择，见表1表1焊缝类型折射角度非熔透型角焊缝40或45熔透型角焊缝45或55 45或604.4. 系统性能探伤仪与探头组合性能应符合本公司的超声波检测通用作业指导书的条文规定。4.5. 试块4.5.1. 标准试块(采用CSK-1A)，试块技术条件应符合ZB7232的规定。4.5.2. 参考试块标准规定采用DL-1和DL-2两种型号的参考试块
32、。参考块应采用与被检验材料相同或声学性质相近的钢材制成。绘制距离波幅曲线时，DL-1参考试块用于调整和校验检测灵敏度。DL-2参考试块主要用于测量非熔透型角焊缝的未熔点有宽度，以及熔透型角焊缝钝边未焊透宽度（即根部未焊透宽度）。DL-2参考试块分为以下五种规格，见表2表2试块尺寸A、B值组别DL-2ADL-2BDL-2CDL-2DDL-2EA1015202530B60555045404.6. 探测面和焊缝表面的修整4.6.1. 探头移动区域内，应消除焊接飞溅、铁屑、油垢等妨碍声耦合的外部杂质。探测面应平整光滑，必要时应进行修磨。4.6.2. 保留余高的焊缝，表面有咬边、较大的隆起或凹陷等也应进
33、行适当地修磨或补焊，形成圆滑过渡。4.7. 缺陷定位坐标的设定4.7.1. 翼板外侧面上定位坐标的设定4.7.1.1. 检测前应在翼板探测面上划出相应腹板厚度的中心线，作为两侧焊缝缺陷定位用的X坐标轴线。4.7.1.2. 在X坐标轴上设置一个易于查找的永久性标志，作为坐标原点。4.7.1.3. 通过坐标原点作与X轴相垂直的直线，即Y坐标轴。4.7.2. 腹板面上的定位坐标的设定缺陷在腹板面上定位时，可利用翼板外侧面上的定位坐标，也可以另行设定。4.8. 探伤仪的调校4.8.1. 时间扫描调整检测前必须对所使用的探头进行时间扫描调整，使进入钢材的声束入射点调整到荧屏机械标尺的零刻度时，基线按比例
34、调节。一般采用深度定位、水平定位或声程定位，检测时可根据实际需要进行选择。4.8.2. 距离波幅曲线的绘制4.8.2.1. 距离波幅曲线由选用的仪器、探头系统在参考试块上以规定的同一基准孔，不同位置或不同声程的回波幅度的实测数据绘制而成。一般用X轴表示基准的位置或声程范围，Y轴表示信号幅度。4.8.2.2. 距离-波幅曲线由高（H）、中（M）、低（L）三条电平控制线组成。彼此相差6dB，见图2波 波高 幅 100%IV 80% 60%III 40%II 20%I声程mm距离mm面板曲线 坐标曲线4.8.2.3. 直探头和斜探头的距离-波幅曲线都使用DL-1参考试块上3横孔的回波进行绘制。4.8
35、.2.4. 距离-波幅曲线可以绘制在坐标纸上（坐标纸曲线），也可以直接绘制在仪器示波面板上（面板曲线）。当采用面板曲线时，在整个检验范围内曲线均应处在示波屏满刻度的20%以上，不足部分可分段绘制。分段绘制时应在示波屏水平刻度的某个读数之后提高一定的分贝值，重新绘制，分段绘制的面板曲线示意图见图34.8.2.5. 如果焊接母材与绘制DAC曲线所用试块之间存在有2dB以上的声能衰减与耦合差，则应对声能衰减与传输损失给予补偿。直探头与斜探头的表面声能损失测定方法见附录A、附录B。4.8.2.6. 所绘制 的距离-波幅曲线只在焊缝检验中使用，不在母材检验中使用。4.8.3. 灵敏度的的设定4.8.3.
36、1. 检测灵敏度4.8.3.2. 斜探头的检测灵敏度灵敏度的基准设定应使用同一斜头对DL-1型参考试块上不同位置的3mm横孔进行扫查.按4.8.2的规定制作距离-波幅曲线，即DAC基准线。要据DAC基准线按表3确定检测灵敏度，即M控制线。表3 过检测灵敏度检验等级检测灵敏度dBADAC+0BDAC+6CDAC+124.8.3.3. 直探头的检测灵敏度对于各检验等级，直探头的检测灵敏度即实测ABC基准线。4.8.3.4. 扫查灵敏度对最高扫查灵敏度不作规定，但最低扫查灵敏度至少高于检测灵敏度6dB。5. 检验过程5.1. 检测5.1.1. 检测方法一般采用25MHz直探头或斜探头的单探头脉冲反射
37、式检测（直接接触或间接接触）。5.1.2. 直探头检测5.1.2.1. 焊缝检测前应在规定的扫查范围内先用直探头对母材扫查。5.1.2.2. 母材检测检测探头移动区内母材中的缺陷，对非危害性缺陷定位、定量，确定这些缺陷是否影响焊缝中缺陷的检出，如果有影响，应在检验记录和报告中加以注明。测定材质对超声波的衰减情况，确定表面状态对声能传输的影响，以便检测时选定检测灵敏度补偿量。5.1.2.3. 焊缝检测检测翼板上位于焊缝根部的层状撕裂。检测翼板侧的角焊缝的焊趾裂纹。检测熔透型角焊缝（带钝边的单面或双面V、J形坡口）中的体积型缺陷及层间和边壁未熔合。检测熔透型角焊缝中钝边未焊透宽度和长度。检测腹板端
38、部I型坡口不完全熔透型角焊缝的未熔占宽。5.1.3. 斜探头检测5.1.3.1. 检测焊缝中纵向裂纹、根部裂纹、边壁或层间未熔合以及夹渣、气孔等。5.1.3.2. 检测焊缝中横向缺陷，如横向裂纹、针孔、运条中断等。5.2. 扫查5.2.1. 全面扫查探头沿整个探测面上无一遗漏地循序移动，扫查间距应小于探头晶片直径或晶片宽度。全面扫查按探头相对于焊道的移动方式分为前后扫查，左右扫查及W形扫查。全面扫查主要用于粗检测，以发现母材或焊道中各种缺陷存在的大体方位和数量，对焊接缺陷的分面进行初步评价。5.2.2. 局部扫查探头在探测面上只作局部范围的移动。主要用于精检测，对全面扫查已发现的缺陷进行精确地
39、定量、定位。直探头扫查时应采用直线扫查、格子扫查、缺陷轮廓扫查、点扫查等。斜探头扫查时应采用摆动扫查、平行扫查、交叉扫查、定点转动扫查及串列扫查等。5.2.3. 扫查速度扫查速度不大于0.15m/S5.2.4. 使用聚焦探头测定未焊透宽度时(包括未熔合占宽在内)，为了提高测量精度，应使探头隔声片方向与焊道走向平行。测定缺陷长度或间距时，应使探头隔声片方向与缺陷长度或间距方向垂直。6. 缺陷判定的规定6.1. 点状缺陷的批示长度均按5mm计值6.2. 相邻两缺陷作为单个缺陷的批示长度计值时应符合表4的规定表4 单个缺陷的批示长度检验等级相邻两缺陷的各向间距1单个缺陷的批示长度A1013LmL=L
40、m+LnB1014LmC1015LmA、B、C110L=Lm+Ln+1注:表中Lm、Ln分别为相邻两缺陷的指示长度，Lm为二者中较长的指示长度。6.3. 条状缺陷的指示长度的测定应采用半波高度法（6dB法）或端点峰值法。6.4. 在非熔透性角焊缝中，判定根部未焊透的缺陷时，其首要条件必须是未熔合占宽大于腹板厚度。7. 检测结果的质量等级7.1. 焊缝中允许不计数的点状缺陷时，其各向最小间距应符合表5的规定。表5点状缺陷各向允许最小间距质量缺陷IIIIIIIVK25605040小于III级K25604030K为焊角尺寸7.2. 相邻点状缺陷各向最小间距小于表5规定时，按表4和表6的规定评级。质量
41、等级检验等级指示长度KABCIK25K10K8K5K25K/3，最大20K/4，最大15K/5，最大15IIK25K15K10K8K25K/2，最大30K/3，最大20K/4，最大204IIIK25K20K15K10K252K/3，最大40K/3，最大30K/3，最大20IVK25缺陷长度大于III级者K25注：对于I型坡口角焊缝，K为焊脚尺寸；对于单V双J型、或双V型坡口角焊缝，K为腹板厚度。7.3. 条状缺陷应根据缺陷的指示长度按表6规定评级。7.4. 条状缺陷允许的各向最小间距应符合表7的规定。表7：条状缺陷允许的各向最小间距检验等级各向最小间距LAL3lmBL4lmCL5lm7.5.
42、每条焊缝端部30mm范围内不得有条状缺陷。7.6. I型坡口角焊缝，腹板端部允许未熔合区域占宽H小于等于腹板厚度，但当H大于时，则多出部分（H=H-）属于根部未焊透。C级检测级内不允许存在根部未焊透。B级检验级内允许根部未焊透的指示长度为条状缺陷指示长度之半。A检验级内允许根部未焊透的指示长度与条状缺陷指示相同。7.7. 熔透型角焊缝允许钝边未焊透的量限按7.6.I型坡口角焊缝根部未焊透7.8. 焊缝中存在最大反射波幅低于M线的点状缺陷时，可评定为I级，但存在密集性缺陷时，应降级处理。7.9. 焊缝中存在返射波幅位于I区的非裂纹性缺陷时，可评定为I级。7.10. 对异常反射信号当检验人员判定为
43、裂纹性缺陷时，无论其波幅及缺陷指未长度如何，该类焊缝均评为IV级。7.11. 在条状缺陷评定区内，同时存在未焊透与点状缺陷时，应各自评级，将二者级别之各减1作为最终级别。7.12. 按质量分级评为不合格的缺陷应给予返修，返修后的部位和受到返修影响的部位都应该用原检测条件进行复检和质量分级。8. 安全作业要求8.1. 现场作业遵守DL5009.1-2002电力建设安全工作规程第一部分:火力发电厂相关规定。 8.2. 高空作业需有作业平台，携带仪器采取背挎式固定仪器的装置，并系挂安全带。8.3. 检测中如有高空及平面交叉作业的，应采取防护措施及人员监护作业。8.4. 采用机油、煤油等易燃品作为偶合剂的，检测时注意流淌和环境污染，检测完毕应彻底清理干净以免引发火灾。8.5. 进入锅炉安装区域一律佩带安全带、安全帽，并系好帽带，2米高以上必须使用安全带，安全带挂钩应系挂于牢固可靠的且应位于胸部以上位置。作业指导GPEC/JHP/OG/JJ/001Page：11 of 13
