Guidefor
Nondestructive Inspection
September2020
GUIDEFOR
NONDESTRUCTIVEINSPECTION SEPTEMBER2020
American Bureau of Shippingthe State of New York 1862 Incorporated by Aet of Legislature of
Foreword(1September2020)
This Guide for Nondestructive Inspection of Hull Welds was originally published in 1975 and subsequentlyupdated in 1986 2002 2011 2017 and 2018. This Guide introduces details of inspection criteria andof inspection of structure members and their welds during the construction of surface vessels and other inspection techniques which are considered as being widely recognized by the industry as a reliable meansrelated marine and offshore structures.
The 2017 edition incorporates a new Section 4 with criteria for Phased Array Ultrasonic Testing (PAUT).PAUT has bee a mon nondestructive testing method in use in shipyards for marine and offshore structures across the world as it provides quicker examination than conventional UT tcchnique forplex geometries.
The February 2018 edition incorporated a new Section 5 for Time of Flight Diffraction (TOFD) ultrasonic inspection. The TOFD ultrasonic examination technique can provide improved detection and sizingcapabilities of discontinuities pared to standard ultrasonic pulse-echo techniques. Both PAUT and
to “Nondestructive Inspection". A new Appendix 6 for Requirements for Nondestructive Testing Suppliers The September 2020 edition modifies the document title from *Nondestructive Inspection of Hull Welds"is added in accordance with IACS UR W35. ISO NDT aceptance criteria is included in accordance withIACS UR W33. Additionally requirements for Advanced Nondestructive Testing have also been updated. in accordance with IACS UR W34 in Subsection 2/1l for Radiographic Testing-Digital (RT-D) Section 4for Phased Array Ultrasonic Testing and Section 5 for Time of Flight Diffraction respectively. This edition also includes requirements for inspection of T-K-Y joints.
It is intended that this Guide is continually published as a Guide rather than Rules in order to collect moreo e u pn o ou xpeq oeqp s u qe oq pue sn s up snpu o xpmanner.
This Guide bees effective on the first day of the month of publication.
Uscrs are advised to check periodically on the ABS website to verify that this version ofthis Guide is the most current.
We wele your feedback. Comments or suggestions can be sent electronically by email to rsd@.
GUIDEFOR
NONDESTRUCTIVEINSPECTION
CONTENTS
SECTION General. .13Application. 131.1 Scope... ..131.3 Conventional NDT and Advanced NDT (ANDT) Techniques.... .131.5 Base Metals.. 131.7 Welding Joints.. Welding Processes... 141.11 1.9 Applicable Methods for Testing of Weld Joints.. 14 152 Preparation for Inspection (1 September 2011).. 162.3 2.1 Weld Surface Appearance.. Visual Inspection of Welds. 162.5 Inspection for Delayed (Hydrogen Induced) Cracking... 17 17Methods of Inspection 183.1 NDT Plan Locations.. General Plan.. .183.5 Method Selection... 18 19Personnel. 205.3 5.1 NDT Trainee.. 20 205.5 NDT Level 1.. NDT Level l. 215.7 NDT Level IlI. 215.9 Supervisor. 22NDT Procedures and Techniques.. 7.1 Conventional NDT. 22 227.3 Advanced NDT. 227.5 T-K-Y Joints.. 239 11 Documentation. Acceptance Criteria 24 .2413 References of Qualification/Certification Standards andRemended Practices/Guidelines... 24
TABLE 1 Applicable Conventional NDT Methods for Testing ofMaterials and Weld Joints ... ..15TABLE 2 Applicable Advanced NDT Methods for Testing of Materials and Weld Joints .. 15
SECTION 2 Radiographic Inspection... 26
1 3 Surface Condition.. General. 26 263.1 General. 26Radiographic Procedure... 3.3 Cause for Rejection. 265 5.1 Personnel (1 September 2011). 26 265.3 Technique (1 September 2011).. 265.5 Film Identification. 275.7 5.9 Radiography Quality Leve.... Image Quality Indicator (IQI).. .27 .295.11 Radiographic Density.. .325.13 Radiographic Film Quality.. .335.15 Storage of Radiographs.. Radiographic Film Interpretation... .34 .347.1 General (1 September 2011) 347.3 Temperature and Humidity Control (1 September 2011).. 347.5 Documentation and Filing System... .349 Report (1 September 2011). 3411 Digital Imaging Systems (1 September 2011). 11.1 General. 35 3511.3 Procedure and Report.. 3511.5 Record. 3713 Extent of Radiographic Inspection. 13.1 General (1 September 2011). 38 3813.3 Surface Vessels. 3813.4 Multi-Hull Vessels. 3813.5 Other Marine and Offshore Structures (1 September 2011)..13.7 Materials and Other Welds. 3915 Location of Radiographic Inspection. 3915.1 15.3 Surface Vessels. General. 39 3915.5 Other Marine and Offshore Structures (1 September2011).. .39
