GB/T 25343.2-2026Railway applications - Welding of rolling stock and components - Part 2: Basic requirements (English PDF)

5.1 General Requirements

5.1.1 The welding quality of fusion-welded components shall conform to GB/T 12467.2 for CL1 grade and GB/T 12467.3 for CL2 grade. According to regulations, CL3 grade should comply with the provisions of GB/T 12467.4.

5.1.2 The welding quality of resistance welded components shall comply with the requirements of ISO 14554 (all parts).

5.1.3 The welding quality of components subjected to friction stir welding shall comply with the provisions of GB/T 34630 (all parts).

5.1.4 Welding manufacturers shall perform welding activities for components of the corresponding classification level. Manufacturers meeting CL1 requirements may perform CL2 or CL3. Activities for CL2-classified components. Manufacturers meeting CL2 requirements can perform the same activities for CL3-classified components. Meeting specific activities. The CL3 requirement stipulates that manufacturers can only perform the same activities on parts classified as CL3.

5.2 Welders and welding operators Welding manufacturers should have welders or welding operators who meet the requirements of GB/T 25343.4. The skills assessment for welders or welding operators should cover the welding processes, material groups, joint types, and welding positions required in production. The number of welders or welding operators should not be less than two.

5.3 Welding Responsible Personnel

5.3.1 General Requirements Welding activities shall be conducted under the supervision of a designated welding supervisor. The welding supervisor shall meet the requirements of GB/T 19419. Staff are divided into the following three levels.

---Level A. Personnel possessing the comprehensive technical knowledge and professional experience specified in GB/T 19419;

---Class B. Personnel with the specialized technical knowledge and professional experience specified in GB/T 19419;

---Level C. Personnel with the basic technical knowledge and professional experience specified in GB/T 19419. The responsibilities and division of labor of the welding personnel shall meet the requirements of Appendix B, and the number and level of the welding personnel shall meet the requirements of Appendix C. The technical skill level of the welding personnel is specified in Appendix D.

5.3.2 Management of Welding Personnel The tasks and responsibilities of welding personnel should comply with the provisions of GB/T 19419, clearly defining their powers and responsibilities to ensure their effectiveness. Unaffected by production or other factors. Welding personnel should ideally be directly employed by the welding manufacturer; if the manufacturer outsources welding personnel, Then it should meet the requirements of 5.3.3. The responsibilities, capabilities, and relationships of management, design, production, or inspection personnel who affect welding quality should be documented, and should at least include the following. content.

a) The tasks and responsibilities of the welding personnel (when there are multiple welding personnel with equal authority, their work and responsibilities should be clearly defined).

b) Regulations for the representative of the person in charge of welding (also applicable to externally hired welding personnel).

c) Activities requiring the participation of the person responsible for welding, such as technical reviews.

d) Measures to be taken when the person in charge of welding is absent (regulations regarding the representative of the person in charge of welding; welding work still permitted; requirements) (Welding work to be terminated).

e) Other processes involving the welding personnel (such as quotation preparation, design, subcontracting). All personnel responsible for welding at welding sites must comply with the provisions of Appendix C.

5.3.3 Requirements for External Welding Personnel Externally hired welding personnel should meet the following requirements.

a) The external welding personnel were able to complete their tasks in accordance with Appendix B;

b) The work of the external welding personnel shall be performed and recorded in accordance with the requirements of 5.3.2, and the record shall include at least the date, location, duration, and... Information such as activity types.

5.4 Inspection personnel Welding inspectors shall comply with the provisions of GB/T 25343.5.

5.5 Technical Requirements

5.5.1 Equipment and Facility Requirements Welding manufacturing (P) or repair (M) activities shall have suitable equipment, facilities, and sites, and shall include at least the following.

a) A roofed, dry, well-ventilated, and bright workshop and work area;

b) A storage area for storing welding filler materials and auxiliary necessities;

c) If welding different groups of materials (such as aluminum and aluminum alloys or stainless steel), each material should be welded using separate tools, processing equipment, and... Equipment, or materials, tools, and fixtures should be cleaned before use;

d) Sufficient energy supply;

e) Suitable testing equipment;

f) Lifting devices for transporting and overturning components;

g) Working platform;

h) A flipping device or robotic arm to allow welding in a convenient horizontal position;

i) Clamping devices for welded components (e.g., floor, sidewalls, endwalls, roof, underframe, bogie, container, and fuel tank);

j) Corrective equipment;

k) Protect aluminum and aluminum alloys or stainless steel when welding to avoid dust and spatter that may reduce the corrosion resistance of the base material or the quality of the weld. and pollutants.

5.5.2 Other technical requirements Other technical requirements for welding manufacturing (P) shall comply with the provisions of GB/T 25343.4.

5.6 Welding Procedure Specification (WPS) The welding procedure specification shall comply with the provisions of GB/T 25343.4.