ABS-14-2002.pdf
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1、 GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS SEPTEMBER 2002 NOTICE NO. 1 January 2004 Note: In order to clarify the required capabilities and qualification of NDT personnel, Subsection 1/5 and Paragraph 1/5.1 are updated based on feedback from the industry. The effective date of these updated
2、requirements is 1 JANUARY 2004. SECTION 1 GENERAL 5 Personnel The Surveyor is to be satisfied that personnel responsible for conducting nondestructive tests are thoroughly familiar with the equipment being used and that the technique and equipment used are suitable for the intended application. NDT
3、personnel are to be qualified by training and experience and certified to perform the necessary calibrations and tests and to interpret and evaluate indications in accordance with the terms of the specification of each inspection method. Personnel certified in accordance with a recognized standard f
4、or training, qualification and certification of NDT personnel shall be classified in any one of the following three levels. Personnel who have not attained certification may be classified as trainees. 5.1 Recognized Certifying Programs The recognized international/national certifying programs e.g.,
5、ASNT Centered Certification Program (ACCP) are to be used for qualification of NDT personnel in the following three levels. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking
6、permitted without license from IHS -,-,- GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS 2002 SEPTEMBER 2002 American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 Copyright 2002 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 US
7、A Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentionally Left Blank Copyright American Bureau of Shipping Provided
8、 by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS . 2002iii Foreword This Guide is the third edition of the Rules for Nondest
9、ructive Inspection of Hull Welds, which was originally published in 1975 and updated as the second edition in 1986. This Guide aims to introduce further details of inspection criteria and additional inspection techniques, which are considered as being widely recognized by the industry as a reliable
10、means of inspection of welds in the construction of surface vessels, offshore structures and other related marine structure. It is intended that these new criteria be published as a Guide, rather than Rules, in order to collect more feedback from industry during its use and be able to reflect this f
11、eedback back into the Guide in a timely manner. Upon completion of this further calibration period, it is intended that the criteria will be published as the Rules for Nondestructive Inspection of Hull Welds. ABS welcomes any questions, comments and feedback as regards the application of this Guide.
12、 The effective date of the Guide is 1 September 2002. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentionally Left
13、Blank Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS . 2002v GUIDE FOR NONDE
14、STRUCTIVE INSPECTION OF HULL WELDS CONTENTS SECTION 1General1 1Preparation for Inspection. 1 3Methods of Inspection. 1 5Personnel 1 5.1Other Recognized National Certifying Programs.1 5.3NDT Trainee1 5.5NDT Level 1 2 5.7NDT Level 2 2 5.9NDT Level 3 2 7NDT Procedures and Techniques. 3 9Inspection for
15、Delayed (Hydrogen Induced) Cracking 3 9.1 Time of Inspection.3 9.3Delayed Cracking Occurrences.3 11Acceptance Standards 3 13Documentation 4 15References 4 SECTION 2Radiographic Inspection5 1General 5 3Surface Condition 5 3.1General5 3.3Cause for Rejection.5 5Radiographic Procedure . 5 5.1Personnel5
16、5.3Technique5 7Film Identification 6 7.1General6 7.3Multiple Films 6 9Radiography Quality Level 6 9.1General6 9.3Radiographic Contrast.6 9.5Radiographic Definition .6 9.7Geometric Unsharpness7 9.9Source-to-Film Distance7 Copyright American Bureau of Shipping Provided by IHS under license with ABS Li
17、censee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking permitted without license from IHS -,-,- viABS GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS . 2002 9.11Minimum Quality Level . 7 11Image Quality Indicator (IQI). 7 11.1General. 7 11.3Hole-type IQI.
18、7 11.5Plaque Design (Penetrameter) . 8 11.7Wire Design IQI 8 11.9IQI Selection. 8 11.11Location of IQI 8 13Radiographic Density 9 13.1General. 9 13.3Calibration of Densitometer 9 13.5Step-Wedge Film Density. 9 13.7Radiographic Film Density Requirements. 9 15Radiographic Film Quality. 10 15.1General.
19、 10 15.3Artifacts and Blemishes 10 17Radiographic Film Interpretation. 10 17.1General. 10 17.3Film Viewing Facilities 10 19Storage of Radiographs 10 19.1General. 10 19.3Temperature and Humidity Control. 11 19.5Documentation and Filing System 11 21Extent of Radiographic Inspection 11 21.1General. 11
20、21.3High Proportion of Non-conforming Indications 11 21.5Surface Vessels 11 21.7Reduction of Inspection Frequency 11 21.9Other Marine Structures . 11 23Location of Radiographic Inspection. 11 23.1General. 11 23.3Surface Vessels 12 23.5Other Marine Structures . 12 25Applicable Criteria. 12 25.1Surfac
21、e Vessels Class A Criteria. 12 25.3Surface Vessels Class B Criteria. 12 25.5Other Marine Structures . 12 25.7Applicability. 12 27Acceptance Criteria. 13 27.1Cracks 13 27.3Incomplete Fusion or Incomplete Penetration 13 27.5Slag 13 27.7Porosity. 13 27.9Multiple Indications. 14 27.11Undercut. 14 29Trea
22、tment of Welds with Non-conforming Indications 15 29.1General. 15 Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:47:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDE FOR NON
23、DESTRUCTIVE INSPECTION OF HULL WELDS . 2002vii 29.3Extent of Indication at One Location15 29.5Extent of Indication at the End of a Radiograph 15 29.7Additional Inspection .15 31References 16 TABLE 1Geometric Unsharpness 17 TABLE 2Hole-type Image Quality Indicator (IQI) Requirements 17 TABLE 3Wire Im
24、age Quality Indicator (IQI) Requirements. 17 FIGURE 1Class A and Class B Incomplete Fusion and Incomplete Penetration Acceptable Length . 18 FIGURE 2Class A Slag Acceptable Length 19 FIGURE 3Class B Slag Acceptable Length 20 FIGURE 4Class A and Class B Porosity Chart for 12.5 mm (0.5 in.) Thick Mate
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