ASME V-2008 pdf download NONDESTRUCTIVE EXAMINATION.
(a) This Section of the Code contains requirements and methods for nondestructive examination (NDE), which are Code requirements to the extent they are specically refer- enced and required by other Code Sections or referencing document. These NDE methods are intended to detect sur- face and internal imperfections in materials, welds, fabri- cated parts, and components. They include radiographic examination, ultrasonic examination, liquid penetrant examination, magnetic particle examination, eddy current examination, visual examination, leak testing, and acoustic emission examination. See Nonmandatory Appendix A of this Article for a listing of common imperfections and damage mechanisms, and the NDE methods that are gener- ally capable of detecting them. (b) For general terms such as Inspection, Flaw, Discon- tinuity, Evaluation, etc., refer to Mandatory Appendix I. T-120 GENERAL (a) Subsection A describes the methods of nondestruc- tive examination to be used if referenced by other Code Sections or referencing documents. (b) Subsection B lists Standards covering nondestruc- tive examination methods which have been accepted as standards. These standards are nonmandatory unless spe- cicallyreferencedinwholeorinpartinSubsectionAoras indicated in other Code Sections or referencing document. (c) Any reference to a paragraph of any Article in Sub- section A of this Section includes all of the applicable rules in the paragraph. 1 In every case, reference to a paragraph includes all the subparagraphs and subdivisions under that paragraph.
(a) The Inspector concerned with the fabrication of the vessel or pressure part shall have the duty of verifying to his satisfaction that all examinations required by the referencing Code Section have been made to the require- ments of this Section and the referencing document(s). He shall have the right to witness any of these examinations to the extent stated in the referencing document(s). Throughout this Section of the Code, the word Inspector means the Authorized Inspector who has been qualied as required in the various referencing Code Sections. (b) The special distinction established in the various Code Sections between inspection and examination and the personnel performing them is also adopted in this Code Section. In other words, the term inspection applies to the functions performed by the Authorized Inspector, but the term examination applies to those quality control functions performed by personnel employed by the Manufacturer. One area of occasional deviation from these distinctions exists. In the ASTM Standard Methods and Recommended Practices incorporated in this Section of the Code by refer- ence or by reproduction in Subsection B, the words inspec- tion or Inspector, which frequently occur in the text or titles of the referenced ASTM documents, may actually describe what the Code calls examination or examiner.
method: the following is a list of nondestructive exami- nation methods and respective abbreviations used within the scope of Section V: RT — Radiography UT — Ultrasonics MT — Magnetic Particle PT — Liquid Penetrants VT — Visual LT — Leak Testing ET — Electromagnetic (Eddy Current) AE — Acoustic Emission nondestructive examination (NDE): the development and application of technical methods to examine materials and/or components in ways that do not impair future use- fulness and serviceability in order to detect, locate, mea- sure, interpret, and evaluate aws. operation: a specic phase of a method or technique. personnel demonstration: when an individual displays an understanding of the examination method and pro- ciency in conducting the examination, by performing a demonstration examination using the employer’s written nondestructive examination procedure. procedure: an orderly sequence of actions describing how a specic technique shall be applied. procedure demonstration: when a written procedure is demonstrated, to the satisfaction of the Inspector, by applying the examination method using the employer’s written nondestructive examination procedure to display compliance with the requirements of this Section, under (a) normal examination conditions per T-150(a), or (b) special conditions as described in T-150(b). procedure qualication: when a written nondestructive examination procedure is qualied in accordance with the detailed requirements of the referencing Code Section. sensitivity: a measure of the level of response from a discontinuity by a nondestructive examination. technique: a technique is a specic way of utilizing a particular nondestructive examination (NDE) method.