Welding technology is special process in a norms EN 29 000 series. Types of welded steel and aluminium constructions. The pressure vessel. Structure of concrete reinforcing bar from . The approval of welding procedures for in terms of valid legislation ČSN EN ISO. The approval of welding procedures for special structures, steel pipes, in terms of valid legislation, pressure equipment. The quality management system in welding ČSN EN ISO 3834 and ČSN EN ISO 9001. Trade surveillance according to ČSN EN ISO 14731 – tasks and accountability. The testing of welders according to ČSN EN 287-1 and ČSN EN ISO 9606. The testing of welded joints to applicable standards and regulations. The documentation of welded joints.