1 Scope
This standard specifies classification, technical requirements, inspection methods, inspection rules, etc. of blocks (or penetrant blocks) for penetrant testing.
This standard is applicable to the type inspection and end-of-manufacturing inspection of penetrant blocks and can also serve as acceptance basis for the ordered goods of the users.
Note: the penetrant blocks to which this standard is applicable do not include Types 1 and 2 blocks specified in GB/T 18851.3.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3190 Wrought Aluminium and Aluminium Alloy - Chemical Composition
GB/T 4237 Hot Rolled Stainless Steel Plate Sheet and Strip
GB/T 5231 Designation and Chemical Composition of Wrought Copper and Copper Alloys
GB/T 12604.3 Non-destructive Testing – Terminology - Terms Used in Penetrant Testing
GB/T 19001 Quality Management Systems - Requirements
GB/T 27025 General Requirements for the Competence of Testing and Calibration Laboratories
JB/T 7523 Non-destructive Testing - Materials for Penetrant Testing
3 Terms and Definitions
For the purpose of this document, the terms and definitions given in GB/T 12604.3 apply.
4 Classification
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Technical Requirements
5.1 Type A Block
5.2 Type B Block
5.3 Type C Block
6 Inspection Methods
6.1 Chemical Composition
6.2 Surface Roughness
6.3 Size
7 Inspection Rules
7.1 Batching Rules
7.2 Inspection Classification
7.3 Inspection Items
8 Marking
8.1 General Principles
8.2 Marking Format
8.3 Example
9 Marking and Label
10 Packaging, Transport and Storage
Bibliography
Figure 1 Type A Block
Figure 2 Five-point Type B Block
Figure 3 Three-point Type B Block
Figure 4 Type C Block
Table 1 Long Diameter of Crack Zone on the Surface of Five-point Type B Block
Table 2 Size of Crack on Type C Block Surface
Table 3 Inspection Items of Type A Block
Table 4 Inspection Items for Five-point Type B Block
Table 5 Inspection Items for the Three-point Type B Block
Table 6 Inspection Items for Type C Block
