工艺技术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 COP Y 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 8Title: PROC

2、EDURE FOR LIQUID PENETRANT EXAMINATIONDEMONSTRATION CERTIFICATIONThis is to certify that this procedure has bee n dem on strated 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 忸 Div.1, Appe ndi

3、x 8.Test Specime n No.:Demo. Report No.:NDE Level 川：AI:Manu facturerMaterialModelSha nghai(Ship Brand)Pen etra ntHD-RSDeveloperHD-XSClea ning Age ntHD-BXTable 3.21 . 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

4、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 所有渗透剂、溶剂或清洗剂、显像剂等。 in 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制造厂材料牌号上海沪 船助剂厂渗透剂HD-RS显像剂HD-XS清洗剂HD-BX3.3当检验奥氏体不锈钢或钛材时， 必 须根据ASME规范第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。3.4当检查镍基合金时，必须按照 ASME规范第

5、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。NJBST Co.,Ltd.QCD-015Rev.:0Page:3 of 8Title: PROCEDURE FOR LIQUID PENETRANT EXAMINATION1. General1.概述1.1 This procedure is applied to dye liquid penetrant exam in atio n of metal material and weldme nt for ASME Code items.1.2 This procedure

6、 is only suitable for detecting the defects that are ope n to the surface of material or weldme nt.1.3 This procedure shall be dem on strated to the satisfaction of the AI prior to implementation.2. Pers onnel2.1 The pers onnel en gaged in the pen etra nt exam in atio n shall be qualified and certif

7、ied in accordanee with the requireme nt of NJBST Co., Ltd. “ Written Practice for NDE Pers onnel Trai ning Exam in ati on, Qualificati on and Certification ”(No.-QCQ.3. Pe netra nt Materials3.1 The penetrant materials is intended to include all pen etra nts, solve nts or clea ning age nts, developer

8、s, etc, used the exam in ati on process.3.2 The liquid pen etra nt exam in atio n materials shall be designated and recommended, as shown in Table 3.2. The materials used for exam in ati on shall be the same type. Intermixing of penetrant materials from different families or differe nt manu facturer

9、s is not permitted.3.3 Whe n exam ining auste nitic sta ini ess steel or tita nium, all materials shall be analyzed individually for chlorine and fluorine content in accordanee with the procedure shown in T-641(b) of ASME Code Section V. The total chlorine plus fluori ne content shall not exceed 1%o

10、f the residue by weight. The certificate of complianee from manufacturer shall be obta in ed.3.4 When exam ining ni ckel base alloys, all materials shall be analyzed individually for sulphur content in accordanee with the procedure shown in T-641(a) of Section VThe sulphur content shall not exceed 1

11、%of the residue by weight. The certificate of complia nee from manu facturer shall be obta in ed.Title: PROCEDURE FOR LIQUID PENETRANT EXAMINATION4. Exam in ati on Procedure4.检验程序4.1检验程序流程图见图4.14.1 Exam in ati on Flow Chart as show n in Fig.4.1.NJBST Co.,Ltd.QCD-015Rev.:0Page:8 of 8所有渗透检验前，被检工件表面及其附

12、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。d 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4.2 Surface Preparati onPrior to all pen etra nt exam i

13、n atio n, the surface to be exam ined and all adjace nt areas withi n at least 1in. (25.4mm) shall be dry and free of dirt, grease, lint, scale, welding flux, weld spatter,paint, oil and otherextra neous matter. If n ecessary, surface shall be prepare by grinding or mach ining.4.3 Preclea ning4.3.1

14、The areas to be exam ined and adjace nt areas with in at least 1in. (25.4mm) shall be clea ned using clea ning age nt before the pen etra nt is applied.4.3.2 After cleaning, drying of the surface to be exam ined shall be accomplished by no rmal evaporatio n or with forced air, as appropriate. The mi

15、nimum drying time shall ensure that the cleaning solution has evaporated prior to applicati on of the pen etra nt.4.4 Pen etra nt Applicati on4.4.1 The pen etra nt may be applied on the surfaceTitle: PROCEDURE FOR LIQUID PENETRANT EXAMINATION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50F(10C)，不得高于 1250F(5

16、2C)。当在上述温度范围内不能满 足时，则按照ASME规范第V卷 使用of workpieces to be examined by any suitable means such as dipp ing, brush ing or spray ing.4.4.2 The temperature of the pen etra nt and the surface to be examined shall not be below 50 F(10C) nor above 125F(52C) throughout the exam in atio n period. Whe n it is no

17、t practical to con duct a liquid pen etra nt exam in ati on within above temperature ran ge, the exam in ati on procedure at the proposed lower or higher T-653, 对提议采用的温度范围, temperature range shall be qualified using a quench cracked alumi num block accordi ng to ASME Code Section V T-653.4.4.3 Penet

18、ration time is critical. The minimum dwell time is show n in Table 4.4.3. For suitable temperature, the area being exam ined shall rema in wetted by the pen etra nt for the dwell time.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443。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443推荐的最少滞留时间MaterialFormAlu minum, magnes

19、ium. steel, brass or bron ze, tita niumCasti ngs & weldsWrought material- and high temperature extrusi ons, forgings, alloysplateDwell Times (mi n)Pen etra nt Developer57107材料吕、镁、钢、黄铜、青铜、钛咼温合金4.5多余滞留时间(min)渗透剂显象剂57107型式铸件和焊缝轧材-挤压件锻件，板材4.5 Excess Pen etfa nt RemovalExcess solve nt removable pen etra

20、nt 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 absorbe nt paper moiste ned with solve nt. To avoid over rem oving, flush ing the surface with solve nt shall be prohibited.4.6 Developer Applicati on4.6

21、.1 The developer shall be applied as soon as possible after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。为了防止清洗 过分，禁止用溶剂清洗表面。4.6施加显像剂4.6.1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Table 4.4.3 Recommended minimum dwell times4.6.2施加显像剂必须采用喷涂法, 薄且均匀，涂层厚度适中。4.6.3在施加湿型显像剂至工件表 面之前，显像剂必

22、须充分搅拌。4.6.4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。4.7判断4.7.1最终判断显像时间应从施加excess pen etra nt removal and dryi ng surface. The surface may be内。 dried by normal evaporation before the developer is applied. The drying time shall be within 5 to 20 min.4.6.2 The developer shall be applied by spray ing

23、. A uniform thin coati ng shall be provided and the coat ing thick ness shall be suitable.4.6.3 Prior to applying wet developer to the surface, the developer must be thoroughly agitated.4.6.4 Dipp ing or flood ing the part with non-aqueous developer is prohibited, since it will dissolve the penetran

24、t in the disc ontinu ities through its solve nt action.4.7 In terpretati on4.7.1 Develop ing time for final in terpretati on begiqsTitle: PROCEDURE FOR LIQUID PENETRANT EXAMINATIONas soon as a wet developer coating is dry. The minimum develop ing time shall be 7min.4.7.2 Final interpretation shall b

25、e made within 7 to 60 min after the requirements of Para. 4.7.1 are satisfied.4.7.3 The develop ing trace can be exam ined either by n atura light or artificial light. A minumum light intensity of 50 fc (500Lx) is required to ensure adequate sensitivity during the exam in atio n and evaluati on of i

26、n dicati ons.4.7.4 The surface shall be divided in to several parts to be exam ined if the surface is so large that the exam in atio n 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-clea ningThe penetrant materia

27、ls shall be clearly removed away from parts after exam in ati on. The post clea ning must be performed if remaining penetrant materials can result in corrosion by the comb in ati on with other materials duri ng the operatio n.The suitable cleaning process shall be adopted for post cleaning such as f

28、lushing with water, mechanical cleaning, solve nt soak ing, etc.The developer shall be cleaned as soon as possible after exam in atio n if the part requests the post clea ning so as to avoic it conden sed on the part.5. Evaluati on of In dicati ons5.1 Broad areas of pigmentation which could mask in

29、dicati ons of disc ontin uities are un acceptable and such areas shall be clea ned and reexam in ed.5.2 An indication is the evidenee of a mechanical imperfection. Only indications with major dimensions greater tha n 1/16 in (1.6mm) shall be con sidered releva nt.5.3 Lin ear in dicati ons are those

30、in dicatio ns in which the length is more than three times the width . Rounded indications are in dicati ons which are circular or ellipsoidal with the len gth less than three times the width.5.4 Any questi on able or doubtful in dicati ons shall be reexam ined to determ ine whether or not they are

31、releva nt. Surface con diti oning may proceed before the reexam in atio n.5.5 The in dicati on of a disc on ti nu ity may be larger tha n the disc on ti nu ity that causes it; however, the size of the in dicati on is the basis of accepta nee or rejecti on.6. Accepta nee Stan dardsThe follow ing rele

32、va nt in dicatio ns are un acceptable:a. any cracks or releva nt lin ear in dicati ons;b. releva nt roun ded in dicati ons greater tha n 3/16i n. (4.8mm);c. four or more releva nt roun ded in dicati ons in a li ne separated by 1/16 in. (1.6mm) or less (edge to edge);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。4.7.2在满足4.7.1要求后，最终判断 必须在7-60分钟内作出。4.7.3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。4.7.4如果受检表面太大，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透 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