This part of GB/T 3323 specifies techniques of radiographic examination of fusion welded joints of metallic materials.
This part is applicable to the radiographic examination of welded joints of plates and pipes or other welded joints.
This part does not specify acceptance levels for radiographic examination of welded joints of metallic materials.
If contracting parties apply lower test criteria, it is possible that the quality of tested image is declined significantly.
Note: This part meets the requirements of GB/T 19943, and the detector used is film.
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 9445 Non-destructive testing - Qualification and certification of NDT personnel (GB/T 9445-2015, ISO 9712:2012, IDT)
GB/T 12604.2 Non-destructive testing - Terminology - Terms used in radiographic testing (GB/T 12604.2-2005, ISO 5576:1997, IDT)
GB/T 19348.1 Non-destructive testing - Industrial radiographic film - Part 1: Classification of film systems for industrial radiography (GB/T 19348.1-2014, ISO 11699-1:2008, MOD)
GB/T 19348.2 Non-destructive testing - Industrial radiographic films - Part 2: Control of film processing by means of reference values (GB/T 19348.2-2003, ISO 11699-2:1998, IDT)
GB/T 19802 Non-destructive testing - Industrial radiographic illuminators - Minimum requirements (GB/T 19802-2005, ISO 5580:1985, IDT)
GB/T 19943 Non-destructive test - Radiographic examination of metallic materials by X- and gamma-rays - Basic rules (GB/T 19943-2005, ISO 5579:1998, IDT)
GB/T 23901.1 Non-destructive testing - Image quality of radiographs - Part 1: Determination of the image quality value using wire-type image quality indicators (GB/T 23901.1-2019, ISO 19232-1:2013, IDT)
GB/T 23901.2 Non-destructive testing - Image quality of radiographs - Part 2: Determination of the image quality value using step/hole-type image quality indicators (GB/T 23901.2-2019, ISO 19232-2:2013, 1DT)
GB/T 23901.4 Non-destructive testing - Image quality of radiographs - Part 4: Experimental evaluation of image quality values and image quality tables (GB/T 23901.4-2019, ISO 19232-4:2013, IDT)
GB/T 25758
(All parts) Non-destructive testing - Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing
EN 12679 Non-destructive testing - Radiographic testing - Determination of the size of industrial radiographic gamma sources
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 12604.2 and the followings apply.
3.1
nominal thickness
t
nominal thickness of the parent material only where manufacturing tolerances do not have to be taken into account
3.2
penetrated thickness
w
thickness of material in the direction of the radiation beam calculated on the basis of the nominal thicknesses of materials
3.3
penetration thickness change
change of the actual penetrated thickness relative to the nominal thickness due to beam angle
3.4
object-to-film distance
b
distance between the surface of the tested object at the side of radiation source and the film measured along the central axis of the radiation beam
3.5
source size
d
size of the radiation source or focal spot size
3.6
source-to-object distance
f
distance between the radiation source (or focus) and the tested object at the side of radiation source measured along the central axis of the radiation beam
3.7
source-to-film distance
SFD
distance between the radiation source (or focus) and the film measured in the direction of the radiation beam
3.8
external diameter
De
nominal external diameter of the pipe
GB/T 3323.1-2019 The following standards are cited：
GB/T 3323.1-2019 Cited by the following standards：
