TANGRA's Quality Management System is ISO 9001. It was introduced and implemented in the company in 2003.
TANGRA is a member of:
- REHVA - European Federation of Heating, Ventilation & Air conditioning Associations
- Bulgarian Chamber of Machine Building (Dipl. Eng. July Armianov, owner of TANGRA is also in the board of the chamber).
- Bulgarian Chamber of Construction.
- CEIB - Confederation of Employers and Industrialists in Bulgaria.
- German-Bulgarian Chamber of Industry and Commerce
- Bulgarian Business Leaders Forum (in Association with International Business Leaders Forum)