无损检测工艺规程（液体渗透）

NJBST Co Ltd QCD 015Rev 0Page 1 of 8 Title PROCEDURE FOR LIQUID PENETRANT EXAMINATION PROCEDURE FOR LIQUID PENETRANT EXAMINATION 液液 体体 渗渗 透透 检检 验验 工工 艺艺 规规 程程 CONTROLLED 在控本 UNCONTROLLED 非在控本 COPY NO 副本编号 PREPARED BY 编制 DATE 日期 REVIEWED BY 审核 DATE 日期 APPROVED BY 批准 DATE 日期 NJBST Co Ltd QCD 015Rev 0Page 2 of 8 Title PROCEDURE FOR LIQUID PENETRANT EXAMINATION DEMONSTRATION CERTIFICATION This is to certify that this procedure has been demonstrated on a test specimen with known defects to the satisfaction of the Authorized Inspector according to ASME Code Section V T 150 as required by the Section Div 1 Appendix 8 Test Specimen No Demo Report No NDE Level AI NJBST Co Ltd QCD 015Rev 0Page 3 of 8 Title PROCEDURE FOR LIQUID PENETRANT EXAMINATION 1 General 1 1 This procedure is applied to dye liquid penetrant examination of metal material and weldment for ASME Code items 1 2 This procedure is only suitable for detecting the defects that are open to the surface of material or weldment 1 3 This procedure shall be demonstrated to the satisfaction of the AI prior to implementation 2 Personnel 2 1 The personnel engaged in the penetrant examination shall be qualified and certified in accordance with the requirement of NJBST Co Ltd s Written Practice for NDE Personnel Training Examination Qualification and Certification No QCD 011 3 Penetrant Materials 1 概述 1 1 本规程适用于 ASME 规范产品 金属材料和焊件着色液体渗透检验 1 2 本规程仅适用于探测材料或焊 件表面开口类缺陷 1 3 本规程在执行之前 须演示至 AI 满意 2 人员 2 1 从事液体渗透检验的人员必须是 根据南京定色钛业有限公司 资料号 QCD 011 进行考试和资格 任命的合格人员 3 渗透材料 3 1 渗透材料包括检验过程中使用的 制造厂 材料 牌号 上海沪 渗透剂 HD RS 船助剂 显像剂 HD XS 厂 清洗剂 HD BX 3 1 The penetrant materials is intended to include all penetrants solvents or cleaning agents developers etc used in the examination process 3 2 The liquid penetrant examination materials shall be designated and recommended as shown in Table 3 2 The materials used for examination shall be the same type Intermixing of penetrant materials from different families or different manufacturers is not permitted Table 3 2 Manufacturer Material Model Shanghai Penetrant HD RS Ship Brand Developer HD XS Cleaning Agent HD BX 3 3 When examining austenitic stainless steel or titanium all materials shall be analyzed individually for chlorine and fluorine content in accordance with the procedure shown in T 641 b of ASME Code Section V The total chlorine plus fluorine content shall not exceed 1 of the residue by weight The certificate of compliance from manufacturer shall be obtained 3 4 When examining nickel base alloys all materials shall be analyzed individually for sulphur content in accordance with the procedure shown in T 641 a of Section V The sulphur content shall not exceed 1 of the residue by weight The certificate of compliance from manufacturer shall be obtained 所有渗透剂 溶剂或清洗剂 显像剂 等 3 2 液体渗透探伤材料 必须是指定 的和推荐的 见表 3 2 检验使用的材 料必须是同一类型的 不允许用不同 类型的或不同制造厂的渗透材料混合 使用 表 3 2 3 3 当检验奥氏体不锈钢或钛材时 必须根据 ASME 规范第 卷 T 641 b 中的程序 对所有材料分别分析氯和 氟的含量 残留氯和氟总含量不得超 过残留物重量的 1 必须有制造厂相 应的合格证 3 4 当检查镍基合金时 必须按照 ASME 规范第 卷 T 641 a 中的程序 对所有材料分别分析硫含量 硫含量 不得超过残留物重量的 1 必须有制 造厂相应的合格证 NJBST Co Ltd QCD 015Rev 0Page 4 of 8 Title PROCEDURE FOR LIQUID PENETRANT EXAMINATION 4 Examination Procedure 4 1 Examination Flow Chart as shown in Fig 4 1 4 检验程序 4 1 检验程序流程图见图 4 1 Surface Preparation Precleaning and Drying Penetrant Application Cleaning Drying Development and Inspection Evaluation and Record Post Cleaning 表面制备 预清洗 干燥 施加渗透剂 清洁 干燥 显像 检验 评定 记录 后清洗 Fig 4 1 4 2 Surface Preparation Prior to all penetrant examination the surface to be examined and all adjacent areas within at least 1in 25 4mm shall be dry and free of dirt grease lint scale welding flux weld spatter paint oil and other extraneous matter If necessary surface shall be prepared by grinding or machining 4 3 Precleaning 4 3 1 The areas to be examined and adjacent areas within at least 1in 25 4mm shall be cleaned using cleaning agent before the penetrant is applied 4 3 2 After cleaning drying of the surface to be examined shall be accomplished by normal evaporation or with forced air as appropriate The minimum drying time shall ensure that the cleaning solution has evaporated prior to application of the penetrant 4 4 Penetrant Application 4 4 1 The penetrant may be applied on the surface 图 4 1 4 2 表面制备 所有渗透检验前 被检工件表面及其附近 至少为 1 英寸 25 4mm 的区域内都应干燥清 洗干净 不得有任何脏物 纤维屑 氧化皮 焊剂 油和其它外来物 必要时 应对表面 进行打磨或机加工 4 3 预清洗 4 3 1 在施加渗透剂之前 被检区域及其附 近至少为 1 英寸 25 4mm 的区域内均需用清 洁剂进行清洗 4 3 2 清洗后 通过适当的方法 自然挥发或 人工通风 对被检表面进行干燥 最少干燥 的时间以保证在施加渗透剂之前清洁剂已完 全挥发为界 4 4 施加渗透剂 4 4 1 可以用浸渍 涂刷或喷涂等任一合适 的方法 在被检工件 NJBST Co Ltd QCD 015Rev 0Page 5 of 8 Title PROCEDURE FOR LIQUID PENETRANT EXAMINATION of workpieces to be examined by any suitable means such as dipping brushing or spraying 4 4 2 The temperature of the penetrant and the surface to be examined shall not be below 500F 100C nor above 1250F 520C throughout the examination period When it is not practical to conduct a liquid penetrant examination within above temperature range the examination procedure at the proposed lower or higher temperature range shall be qualified using a quench cracked aluminum block according to ASME Code Section V T 653 4 4 3 Penetration time is critical The minimum dwell time is shown in Table 4 4 3 For suitable temperature the area being examined shall remain wetted by the penetrant for the dwell time Table 4 4 3 Recommended minimum dwell times 4 5 Excess Penetrant Removal Excess solvent removable penetrant shall be removed by 表面施加渗透剂 4 4 2 在整个检验期间 渗透剂和 被检表面的温度不得低于 500F 100C 不得高于 1250F 520C 当在上述温度范围内不能满 足时 则按照 ASME 规范第 V 卷 T 653 对提议采用的温度范围 使用 有淬火裂纹的铝试块进行验证 4 4 3 严格控制渗透时间 最小滞 留时间见表 4 4 3 适当的温度条件 下 在滞留时间内 被检区域必须 用渗透剂保持潮湿 表 4 4 3 推荐的最少滞留时间 4 5 多余渗透剂的清除 多余渗透剂必须用布或吸纸擦去 剩下的痕迹必须用蘸有溶剂的布或 纸在表面轻轻地擦去 为了防止清 Material Form Dwell Times min Penetrant Developer Aluminum magn Castings however the size of the indication is the basis of acceptance or rejection 6 Acceptance Standards The following relevant indications are unacceptable a any cracks or relevant linear indications b relevant rounded indications greater than 3 16in 4 8mm c four or more relevant rounded indications in a line separated by 1 16 in 1 6mm or less edge to edge 5 3 线性缺陷是指长度大于三倍宽度 的缺陷 面形缺陷是指长度小于 3 倍 宽度的圆形或椭圆形缺陷 5 4 任何有疑问或难以判断的显示 必须重新检验以确认是否是缺陷显示 重新检验前可先作表面修整 5 5 缺陷显示可能大于缺陷本身 但 是以显示的尺寸作为合格与否的依据 6 合格标准 下列缺陷显示为不合格 a 任一裂纹或相应的线性缺陷 b 大于 3 16 英寸 4 8mm 的面形 缺陷 c 一条直线上有 4 个