DIN Standards Committee Materials Testing
ISO 3545-1
Steel tubes and fittings; symbols for use in specifications; part 1: tubes and tubular accessories with circular cross-section
Stahlrohre, Fittings und Hohlprofile für den Stahlbau - Symbole und Definition von Begriffen für die Verwendung in Erzeugnisnormen
Responsible national committee
NA 178 BR - Steering Committee of DIN Standards Committee process and plant technology