1.0.1 This Part in DL/T 5210 specifies the relevant requirements in quality acceptance and quality grade evaluation of welding project of plant unit installation, maintenance, modification projects and accessorial construction project in fuel electric plant.
1.0.2 This standard is applicable to the thermal generating unit burnt coal, gasses, fuel oil and other solid fuels.
2 Normative References
The following documents contain contents which, through reference in this text, composite provisions of this standard. For dated reference, subsequent amendments (excepting corrigenda content) to, or revisions of, any of these publications do not apply. Parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to apply in the standard.
GB/T 3323 Radiographic Examination of Fusion Welded Joints in Metallic Materials
GB/T 11345 Method for Manual Ultrasonic Testing and Classification of Testing Results for Ferritic Steel Welds
JB/T 4730.3 Nondestructive Testing of Pressure Equipments Part 3: Ultasonic Testing
DL/T 754-2001 Code of the Welding Technique for Aluminium Bus
DL/T 819 The Code of the Welding Heat Treatment for Power Plant
DL/T 820 The Code of Ultrasonic Inspection Section for Butt Welds Of Pipes
DL/T 821 The Code of Radiographic Examination of Butt Welded-joints of Pressure Steels Pipes and Tubes
DL/T 869-2004 The Code of Welding for Power Plant
DL/T 1097 The Code of Welding for Tube-plate of Condenser of Power Plant
3 Terms And Definitions
The following terms and definitions are applicable to this part of DL/T 5210.
3.0.1
Visual examination
Visual inspection on the parts of welding joints which is visible directly or indirectly, or inspected by instruments; and visual examination on the surface quality of welding joint by touch method.
3.0.2
Measuring examination
Visual examination on the quality of welding joints surface by measuring tools (such as welding inspection ruler).
3.0.3
Secondary inspector
Professional inspectors for inspect the welding project of construction organization.
3.0.4
Triple inspector
Professional inspectors for inspect the welding quality of construction organization.
