This standard provides a reference guide for the kinds ofnondestructive examination methods that are used to verify thatwelds meet the requirements of a code or specification. Thenondestructive examination methods described are:
(1) Visual
(2) Penetrant
(3) Magnetic Particle
(4) Radiographic
(5) Ultrasonic
(6) Electromagnetic
(7) Leak
The types of discontinuities detected with each method aredisclosed and their causes discussed. Acceptance criteria are notaddressed in this standard. Such requirements may be in theapplication code. Requirements for nondestructive examination andacceptance criteria not provided in the application should be thespecified in procurement documents prior the award ofcontracts.
Nondestructive examination (NDE) is a general term used in thistext to identify the common inspection methods for evaluation ofwelds and related materials without destroying theirusefulness.
Principal factors to consider when choosing an inspection methodare the advantages and limitations of the method, anticipated typeand size of discontinuity, acceptance standards, and cost. Annex Ais a guide to process selection.
AWS has chosen nondestructive examination (NDE) as the preferredterminology for these inspection methods. In other standards,literature, and industry usage, other expressions are commonlyused. Among these are: nondestructive evaluation (NDE),nondestructive inspection (NDI), and nondestructive testing (NDT).It must be emphasized that all of these expressions are commonlyused and may be considered equivalent.
- Edition:
- 4
- Published:
- 01/01/2009
- ANSI:
- ANSI Approved
- Number of Pages:
- 66
- File Size:
- 1 file , 2.8 MB
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