This standard specifies the film requirements, pinhole classification and evaluation rules for X-ray radiographic inspection and evaluation of aluminum alloy casting pinholes (circular). This standard applies to aluminum alloy castings with a transillumination thickness of no more than 50mm. This standard does not apply to aluminum alloy die castings. GB/T 11346-1989 Pinhole (circular) classification for X-ray radiographic inspection of aluminum alloy castings GB/T11346-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Classification of pin hole by radiographic examinationfor aluminium alloy casts
1 Subject and scope of application
GB 11346—89
This standard specifies the film requirements, pinhole classification and assessment rules for the X-ray film inspection and assessment of pinholes (round) in aluminium alloy castings. This standard applies to aluminium alloy castings with a transillumination thickness of not more than 50 mm. This standard does not apply to aluminium alloy die castings. 2 Reference standards
GB5618 Linear image quality meter
ZBJ04004 Radiographic flaw detection method
3 Personnel qualifications
Personnel engaged in radiographic film assessment must hold a qualification certificate of level 2 or above issued by the relevant national competent authorities and suitable for their work.
4 Requirements for negative film
4.1 The preparation of negative film shall be carried out in accordance with the provisions of ZBJ04004. 4.2 The image quality meter used for negative film photography shall comply with the provisions of GB5618, and the minimum aluminum wire diameter required to be displayed is shown in the following table. mm
Transillumination thickness
Required to be displayed
Minimum aluminum wire diameter
>0～2
5 Pinhole (shape) classification
>2～4
5.1 Divided into two groups A and B according to the thickness of the transillumination
>4～6
>6～8
Group A classification is applicable to castings with a transillumination thickness of less than 13mm. Group B classification is applicable to castings with a transillumination thickness of 13~50 mm. Note: The thickness of the standard sample of Group A is 6mm, and the thickness of the standard sample of Group B is 20mm. 5.2Group A is divided into 8 grades, see classification diagram 1.
Group B is divided into 8 levels, see classification diagram 2. bzxz.net
Note: See the separate book for Figure 1 and Figure 2.
Approved by the State Administration of Technical Supervision on May 8, 1989>8～12
>12～18
>18~~26
>26～38
>38～50
Implementation on January 1, 1990
6 Assessment rules
GB 11346-89
6.1 Take the area with the most serious pinhole (circular) defect on the X-ray film of the casting and assess it according to the provisions of Chapter 5. 6.2 When the pinhole (circular) defect shown on the X-ray film of the casting is between two adjacent levels, assess it according to the severity level. 7 Film evaluation result record
The film evaluation result record shall at least include: casting drawing number, film number, assessed pinhole (circular) grade, film evaluation personnel signature and film evaluation date.
Additional remarks:
This standard is proposed and managed by the National Technical Committee for Nondestructive Testing Standardization. This standard is drafted by the 621st Institute of the Ministry of Aerospace Industry. 336
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