NA 041
DIN Standards Committee Heating and Ventilation Technology and their Safety
Technical rule
[CURRENT]
AGFW FW 446
AGFW FW 446
Welded joints on steel pipes in district heating supply - Performing, examination and evaluation
Title (German)
Schweißverbindungen an Rohrleitungen aus Stahl in der Fernwärmeversorgung - Herstellung, Prüfung und Bewertung