Assembly and welding
The works are carried out on:
- universal assembly and welding tables;
- building berths for assembly and welding of beams and columns.
Welding certificate EN 1090-2 +А1:2018 (steel constructions):
- 121 – submerged arc welding with compact wire (SAW);
- 135 – metal – active gas welding (MАG)
- Degree of steel cleaning - up to Sa3 (according to ISO 12944-4);
- Stages of the process:
- control of the degree of surface cleaning (according to ISO 8501-1);
- analysis of the requirements of the supplier of the coating system in terms of roughness and degree of cleaning;
- abrasive blasting with a capacity of up to 9 sq.m/h;
- dedusting of cleaned surfaces (according to ISO 8502-3);
- evaluation of the degree of cleaning and roughness of the cleaned surface (according to ISO 8501-1)