无损检测工艺规程液体渗透

1、NJBST Co.,Ltd.QCD-015Rev.:0Page:1 of 8Title: PROCEDURE FOR LIQUID PENETRANT EXAMINATIONPROCEDURE FOR LIQUID PENETRANT EXAMINATION液体渗透检验工艺规程CONTROLLED 在控本口UNCONTROLLED非在控本口COPY NO副本编号：PREPARED BY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 8Title: PROCEDURE

2、FOR LIQUID PENETRANT EXAMINATIONDEMONSTRATION CERTIFICATIONThis is to certify that this procedure has been demonstrated on atest specimen with known defects to the satisfaction of the AuthorizedInspector according to ASMEDodeSection V, T-150 as required by the Section WDiv.1, Appendix 8.Test Specime

3、n No.:Demo. Report No.:NDE Level m : AI:NJBST Co.,Ltd.QCD-015Rev.:0Page:3 of 8Title: PROCEDURE FOR LIQUID PENETRANT EXAMINATION1. General1 .概述This procedure is applied to dye liquid penetrant examination of metal material and weldment for ASME Code items.This procedure is only suitable for detecting

4、 the defects that are open to the surface of material or weldment.This procedure shall be demonstrated to the satisfaction of the AI prior to implementation.2. Personnel2.1The personnel engaged in the penetrantexamination shall be qualifiedand certified inaccordance with the requirement of NJBSTCo.,

5、 Ltd. s“ Written Practice for NDE Personnel TrainingExamination,QualificationCertification (No.:QCD-011).3. Penetrant Materialsand3.1Theenetrant materials is intendedto. 1本规程适用于 ASM觊范产品金 属材料和焊件着色液体渗透检验。. 2本规程仅适用于探测材料或焊件 表面开口类缺陷。. 3本规程在执行之前，须演示至AI满意。.人员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

6、任命的 合格人员。. 渗透材料渗透材料包括检验过程中使用的 所有渗透剂、溶剂或清洗剂、显像剂等。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include all penetrnts, solvents or cleaning agents,developers, etc, used in the examination process.3.2 The liquid penetrant examination materialsshall be designated and recommended,a

7、s shownin Tablet ,制造厂材料鹿号衣3.2上海沪渗透剂HD-RS船助剂显像剂HD-XS厂清洗剂HD-BX3.2. The materialsused for examination shall be thesame type. Intermixing of penetrant materials from different families or different manufacturers is notpermitted.Table 3.2 ManufacturerMaterialModelShanghaiPenetrantHD-RS(Ship Brand)Develop

8、erHD-XS3.3当检验奥氏体不锈钢或钛材时，必须根据ASM觊范第V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。Cleaning AgentHD-BX3.3 When examining austenitic stainless steel or3.4当检查馍基合金时，必须按照ASME 规范第V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。titanium,all materialsshall be analyzedindividua

9、lly for chlorine and fluorine content in accordance with the procedure shown in T-641(b) of ASMEDode Section V. The total chlorine plus fluorine content shall not exceed 1%of the residue by weight.The certificate of compliance from manufacturer be obtained.3.4W商悔躲阳阳0n nickebase alloys,materials shal

10、l be analyzed individually for sulphur content in accordance with the procedure shown in 丁-6414 of SecteaNVTnfeDuiinphur content shall not exceed 1%of the residue by weight. The certificatecompliance昨0佻胸汜取胡曲班到shall be obtained.表向制备预清洗，干燥施加渗透剂shallallofNJBST Co.,Ltd.QCD-015Cleaningtle: PROCEDURE FOR

11、LIQUID PENETRAN4. Examination ProcedurePage:4 of 8T EXAMINATION币吉Rev.:04.1Fig.4.1.ExaminationFlow-Chart as shown inDrying4.检验程序4.1检验程序流程单僚图4.1Development and Inspection显像、检验评定、记录Evaluation and RecordPost Cleaning后清洗4.2图4.1表面制备Fig. 4.14.2 Surface PreparationPrior to all penetrant examination, surface

12、 to be examined and all adjacent areasthe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。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

13、 with forced air, as appropriate.The minimum drying time shall ensure that the cleaning solution has evaporated prior to application of the pepetrant.4.那能隔trant Applcation F0rmDwell Times (min)4.4.1 The penetrant may be appliednetr0nt DeveloperCastings & weldsQCD-015Wrought material- e TxtiesiOnR0cg

14、EDUREFOR0LIQUID PfNETsuitablemeanssuchas dipping, brushingor spraying.4.4.2 The temperature of the penetrant and the surface to be examined shall not be below 500F(10C) nor above125F(52C) throughout the examination period. When itexamination procedure at the proposed lower or higher temperature rang

15、e shall be qualified using a quench cracked aluminum block according to ASME Code Section V, T-6 Penetration time is critical. The minimumdwell 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

16、Recommended minimum dwell timesbeRev材料型式滞留时间(min)渗透剂显象剂铝、镁、铸件和焊缝57)钢、黄铜、Page:5of 8nTExA他TON1b板材107penetrantrange,thewithin 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 pr

17、epared by grinding or machining.4.3 PrecleaningThe areas to be examined and adjacent areas within at least 1in. (25.4mm) shall surfaceAluminum, magn-NJBSTCob囹5 or bronze, titanium and high temperatureofalWysrkpieces to Ipafexamined by any is not practical to conduct a liquid examination within above

18、 temperature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。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。施加渗透剂可以用浸渍、涂刷或喷涂等任一合适 的方法，在被检工件在整个检验期间，渗透剂和被检表面的温度不得低于500F(10 0C),不得高于 1250F(52 0C)O当在上述温度范围内不能满足时，则按照ASM觑范第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。严格控制渗透时间，最小滞留时间见表4.4.3 。适当的温度

19、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Excess Penetrant RemovalExcess solvent removable penetrant shall be removed by wiping with a cloth or absorbent paper. The remaining traces shall be removed by lightly wiping the surface with a cloth or absorbent paper moistened with solvent. To avoid over

20、removing, flushing the surface with solvent shall be prohibited.Developer ApplicationThe developer shall be applied as soon as possible after excess penetrant removal and drying surface. The surface may be dried by normal evaporation before the developer is applied. The drying time shall be within 5

21、 to 20 min.The developer shall be applied by spraying. A uniform thin coating shall be provided and the coating thickness shall be suitable.Prior to applying wet developer to the surface, the developer must be thoroughly agitated.Dipping or flooding the part with non-aqueous developer is prohibited,

22、 since it will dissolve the penetrant in the discontinuities through its solvent action.InterpretationDeveloping time for final interpretation begins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后溶剂的布或 纸在表面轻轻地擦去。为了防止清洗 过分，禁止用溶剂清洗表面。施加显像剂多余的渗透剂被清除且工件干燥后，必须尽快地施加显像剂。显 像剂施加之前，工件表面可以自然挥 发干燥，干燥时间必须在5-20分钟以内。施加显像剂必须采用喷

23、涂法， 薄且均匀，涂层厚度适中。在施加湿型显像剂至工件表 面之前，显像剂必须充分搅拌。禁用非水湿显像剂浸渍或灌 洗工件，因非水湿显像剂会通过溶解 作用将缺陷中的渗透剂溶解掉。判断最终判断显像时间应从施加NJBST Co.,Ltd.QCD-015Rev.:0Page:6 of 8Title: PROCEDURE FOR LIQUID PENETRANT EXAMINATIONas soon as a wet developer coating is dry. The minimum developing time shall be 7min.Final interpretation shall

24、be madewithin 7 to 60 min after the requirements of Para. 4.7.1 are satisfied.The developing trace can be examined either by natural light or artificial light. A minumum lightintensity of 50 fc (500Lx) is required to ensure adequate sensitivityduring the examination andevaluation of indications.The

25、surface shall be divided into several parts to be examined if the surface is so large that the干显像剂后或从湿显像剂涂层干燥后 立即起算，不得少于7分钟。在满足4.7.1要求后，最终判 断必须在7-60分钟内作出。显像痕迹可以通过自然光或人 工白光进行检验，要求最小灯光强度 为50fc(500LX),以保证在检验和评价 显示过程中有充分的灵敏度。如果受检表向太大，无法在规 定时间内完成检验，则应将表面分成 几个部进行检验。显像情况可以用肉 眼或放大镜进行观察。4.8后清洗检验后，必须完全清除工件上的渗

26、透examination can not be finished within the given time. The developing condition can be observed either by eyes or by means of a magnifier.4.8 Post-cleaningThe penetrant materials shall be clearly removed away from parts after examination. The post cleaning must be performed if remaining penetrant m

27、aterials can result in corrosion by the combination with other materials during the operation.The suitable cleaning process shall be adopted for post cleaning such as flushing with water, mechanical cleaning, solvent soaking, etc.The developer shall be cleaned as soon as possible after examination i

28、f the part requests the post cleaning so as to avoid it condensed on the part.Evaluation of IndicationsBroad areas of pigmentation which could mask indications of discontinuities are unacceptable and such areas shall be cleaned and reexamined.An indication is the evidence of a mechanical imperfectio

29、n. Only indications with major dimensions greater than 1/16in(1.6mm) shall be consideredrelevant.Linear indications are those indications in which the length is more than three times the width . Rounded indications are indications which are circular or ellipsoidal with the length less than three tim

30、es the width.Any questionable or doubtful indications shall be reexamined to determine whether or not they are relevant. Surface conditioning may proceed before the reexamination.The indication of a discontinuity may be larger than the discontinuity that causes it; however, the size of the indicatio

31、n is the basis of acceptance or rejection.Acceptance StandardsThe following relevant indications are unacceptable: a. any cracks or relevant linear indications;relevant rounded indications greater than 3/16in. (4.8mm);材料，如果残余渗透材料在操作过程 中与其它材料混合后会导致腐蚀，则 必须进行后清洗。可以采用如用水冲 洗、机械清洁、溶剂浸泡等适当的清 洁工作，来进行后清洗。如果需要后清洗，则检验后必须尽快 进行，以免显像剂凝固在工件上。. 显示评价大面积颜料沉淀会掩盖缺陷显 示，是不合格的，这些区域